Part 104

Spigelia, 346

Spikenard, 213 False, 525

Spindle-tree, 110

Spiraea, 153, _153_

Spiranthes, 501

Spirodela, 552

Spleenwort, 683

Spoonwood, 319

Sporobolus, 645

Spring-beauty, 91

Spruce, 491

Spurge, 452

Spurrey, 90 Sand, 89

Squaw-root, 394

Squaw-weed, 293

Squirrel-corn, 60

Stachys, 421

Staff-tree, 110

Stagger-bush, 316

Staphylea, 118

Star-flower, 329

Star-grass, 512, 516

Star-of-Bethlehem, 523

Starwort, 86, 255 Water, 182

Statice, 327

Steeple-bush, 153

_Steetzia_, 724

Steironema, 330

Stellaria, 86, 733

Stenanthium, 534

Stenosiphon, 193

Stickseed, 362

Sticktight, 284

Stillingia, 460

Stipa, 641

Stitchwort, 87

Stonecrop, 177 Ditch, 176

Stone-root, 407

Storax, 333

Storksbill, 104

Stramonium, 377

Strawberry, 158 Barren, 158

Strawberry-bush, 110

Streptopus, 526

Strophostyles, 145

_Struthiopteris_, 690

Stuartia, 96

Stylophorum, 58

Stylosanthes, 142

STYRACACEAE, 333

Styrax, 334

Suaeda, 434

Subularia, 69

Succory, 298

Sugar-berry, 463

Sullivantia, 171

Sumach, 118

Sundew, 178

Sunflower, 277

Supple-Jack, 111

Sweetbrier, 164

Sweet-cicely, 210

Sweet-flag, 551

Sweet-gale, 469

Sweet-gum, 180

Sweet-leaf, 334

Sweet-scented shrub, 167

Sweet William, 83 Wild, 354

Sycamore, 466

Symphoricarpos, 220

Symphytum, 367

Symplocarpus, 550

Symplocos, 334

Synandra, 419

Synthyris, 386

Syringa, 174

Tacamahac, 487

Talinum, 91, 733

Tamarack, 493

Tanacetum, 290

Tansy, 290

Taraxacum, 303

Tare, 142

Taxodium, 493

Taxus, 494

Tea-berry, 316

Tea Family, 95

Tea, Labrador, 321 Mexican, 433 New, Jersey, 112 Oswego, 414

Tear-thumb, 442

Teasel, 229

Tecoma, 398

Tephrosia, 133

TERNSTROEMIACEAE, 95

Tetragonotheca, 274

_Tetranthera_, 447

Teucrium, 406

Thalictrum, 39, 39

Thaspium, 204, _208_

Thelesperma, 285

Thelypodium, 72

Thermopsis, 126

Thimbleberry, 155

Thistle, 295 Canada, 296 Cotton, 297 Plumeless, 296 Scotch, 297 Sow, 305 Star, 297

Thlaspi, 73

Thorn, 165 Black, 152 White, 165

Thoroughwax, 206

Thoroughwort, 239

Thuya, 493

Thyme, 411 Basil, 411 Creeping, 411

THYMELAEACEAE, 448

Thymus, 411

Tiarella, 171

Tickseed, 281

Tiedemannia, 202

Tilia, 101

TILIACEAE, 101

Tillaea, 177

Tillandsia, 511

Timothy, 645

Tinker's-weed, 291

Tipularia, 499

_Tissa_, 89

Toadflax, 379 Bastard, 450

Tobacco, 377 Indian, 307

Tofieldia, 532

Toothache-tree, 106

Toothwort, 64

Touch-me-not, 106

Townsendia, 254

Trachelospermum, 338

Tradescantia, 539

Tragia, 460

Tragopogon, 298

Trantvetteria, 39

Tread-softly, 457

Tree-of-heaven, 107

Trefoil, 128 Shrubby, 107 Tick, 138

Trichocolea, 709

Trichomanes, 692

Trichostema, 405

_Tricuspis_, 657, 658

Trientalis, 329

Trifolium, 128

Triglochin, 557

Trilisa, 243

Trillium, 530

Triodia, 657

Triosteum, 219

Tripsacum, 636

Trisetum, 653, 735

_Triticum_, 671, 672

Trollius, 45

Troximon, 302

Trumpet-creeper, 398

Trumpet-flower, 398

Trumpets, 57

Trumpet-weed, 239

Tsuga, 492

Tulip-tree, 50

Tumbleweed, 428

Tupelo, 215

Turnip, Indian, 549

Turnsole, 361

Turtlehead, 381

Tussilago, 291

Twayblade, 499, 501

Twin-flower, 219

Twin-leaf, 53

Twisted-stalk, 526

Typha, 547

TYPHACLAE, 547

Ulmus, 462

UMBELLIFERAE, 198

Umbrella-leaf, 53

Umbrella-tree, 49, 50

Unicorn-plant, 399

Uniola, 662

Urtica, 464

URTICACEAE, 461

Utricularia, 395

Uvularia, 527, _528_

_Vaccaria_, 83

Vaccinium, 312

Valeriana (Valerian), 228 Greek, 356

VALERIANACEAE, 228

Valerianella, 228

Vallisneria, 496

Vanilla-plant, 243

Velvet-leaf, 99

Venus's Fly-trap, 179 Looking-glass, 308

Veratrum, _533_, 533

Verbascum, 379

Verbena, 401

VERBENACEAE, 401

Verbesina, 280

Vernonia, 238

Veronica, 386

Vervain, 401

_Vesicaria_, 69

Vetch, 142 Joint, Sensitive, 137 Milk, 134

Vetchling, 143

Viburnum, 217

Vicia, 142

_Vilfa_, 645, 646

Vincetoxicum, 344

Vine Family, 112

Viola, 78

VIOLACEAE, 78

Violet, 78

Violet, Dame's, 71 Dog's-tooth, 528 Green, 81 Water, 328

Virginian-creeper, 115

Virgin's-bower, 35

VITACEAE, 112

Vitis, 113, 114

Waahoo, 110

Wake-robin, 530

Waldsteinia, 157

Walking-leaf, 685

Wallflower, Western, 71

Walnut, 467

Watercress, 69

Waterleaf, 357

Water-nymph, 55

Water-shield, 55

Waterweed, 495

Waterwort, 91

Wax work, 110

Wayfaring-tree, 217

Weigela, 222

Weld, 75

Wheat, Cow, 393 India, 443

Whin, 127

Whiteweed, 289

Whitlow-wort, 426

Wicky, 319

Willow, 480

Willow-herb, 188

Wind-flower, 36, 38

Winterberry, 109

Wintergreen, 315, 323 Aromatic, 315 Chickweed, 329 Creeping, 315 Spotted, 313

Wistaria, 134

Witch hazel, 179

Wolf berry, 220

Wolfsbane, 46

Woodbine, 115, 220

Woodsia, 690

Woodwardia, 683

Wood-waxen, 127

Wormseed, 434

Wormwood, 289 Roman, 273

Xanthium, 274

Xanthorrhiza, 48

_Xanthosoma_, 550

Xanthoxylum, 106

Xerophyllum, 532

XYRIDACEAE, 536

Xyris, 537

Yam, 517

Yarrow, 289

Yaupon, 108

Yellow-eyed, Grass, 537

Yellow-rattle, 392

Yellow-root, 48

Yellow-wood, 126

Yew, 494

Yucca, 524

Zannichellia, 565

Zephyranthes, 516, 735

Zizania, 635

Zizia, _206_, 207

Zostera, 565

Zygadenus, 534

PLATES

WITH EXPLANATIONS.

EXPLANATION OF PLATE I.

CYPERUS.--(1) Small plant of C. diandrus; (2) a spikelet magnified; (3) a piece of the rhachis with one scale enclosing its flower; (4) a separate flower more magnified.--(5) C. erythrorhizos, a spikelet magnified; the lower scales and flowers have fallen, showing the small internal scales of the section Papyrus, formed of the winged margins of the joints of the rhachis detached; (6) a separate one, more enlarged; (7) a flower; (8) an achene, cut in two.--(9) C. dentatus, a piece of the rhachis of a spike with the lower part of one scale, showing how it is decurrent on the joint beneath (cut across) to form scale-like wings.

DULICHIUM.--(1) Upper part of a plant of D. spathaceum; (2) part of a spikelet somewhat enlarged; (3) piece of rhachis, and one scale decurrent on the joint beneath; (4) magnified flower.

KYLLINGA.--(1) Plant of K. pumila; (2) one-flowered spikelet on a piece of the rhachis, enlarged; (3) the same, more enlarged and open; (4) achene; and (5) section of same magnified.

EXPLANATION OF PLATE II.

HEMICARPHA.--(1) Plant of H. subsquarrosa, natural size; (2) a spikelet enlarged, with its bract; (3) magnified scale of the same; (5) a flower, with its single stamen and minute internal scale, magnified; (6) achene, magnified.

LIPOCARPHA.--(1) Upper part of plants of L. maculata, with spikelets; (2) diagram of a flower, representing the ovary between the two internal scales, a single stamen, the scale of the spikelet on one side, and the axis of the spikelet on the other; (3) scale of spikelet detached; (4) a flower with its two inner scales; (5) achene, magnified.

FUIRENA.--(1) Upper portion of plant of F. squarrosa, var. pumila; (2) scale of spike enclosing a flower; (3) open scale of same; (4) flower; (5) one of the scales and one of the bristles of the perianth; (6) achene, and (7) section of same.

EXPLANATION OF PLATE III.

ELEOCHARIS.--(1) Small plant of E. olivacea; (2) the spikelet enlarged; (3) detached scale; (4) flower; (5) achene and bristles.--(6) E. quadrangulata, spikelet; (7) a scale; (8) flower; (9) achene and bristles.--(10) E. tuberculosa; the achene with its great tubercle, and bristles.

SCIRPUS.--(1) Summit of plant of small S. debilis; (2) a spikelet; (3) a scale of the same, and (4) flower; (5) achene with its bristles.

ERIOPHORUM.--(1) Small plant of E. alpinum, in flower; (2) spikelet; (3) a scale, and (4) a flower from the same; (5) the spikelet, in fruit, the bristles forming a cottony tuft; (6) achene and its bristles.--(6, under _Scirpus_) a small portion of the inflorescence of E. cyperinum; (7) a flower; (8) a spikelet in fruit; (9) achene from the same, with the tortuous bristles; (10) section of the achene.

FIMBRISTYLIS.--(1) Summit of a small flowering stem of F. laxa; (2) a spikelet of the same; (3) a detached scale, and (4) a flower of the same; (5) achene.--F. autumnalis, (6), a spikelet, enlarged; (7) flower; (8) achene, and (9) section of the same.

EXPLANATION OF PLATE IV.

DICHROMENA.--(1) Head and involucre of D. latifolia; (2) a scale from one of the spikelets, and (3) the same cut across; (4) a flower; (5) achene with its tubercle.

PSILOCARYA.--(1) Part of plant, (2) enlarged spikelet, (3) detached scale, (4) flower, and (5) achene with its beak, of P. scirpoides.

RHYNCHOSPORA.--(1) Upper part of flowering stem of R. Torreyana; (2) a spikelet; (3) detached flower; (4) achene, with short bristles at its base; (5) one of these bristles more magnified.

R. (Sec. CERATOSCHOENUS).--(1) Upper part of fruiting plant, (2) detached spikelet, (3) flower, and (4) beaked achene, with its bristles, of R. macrostachya.

EXPLANATION OF PLATE V.

CLADIUM.--(1) Summit of a plant of C. mariscoides; (2) detached spikelet; (3) same, open, showing a staminate and a perfect flower; (4) the nut-like achene, and (5) the longitudinal section of the same.

SCLERIA.--(6) Summit of a flowering stem of S. reticularis; (7) three spikelets from a cluster, the middle one pistillate, the lateral ones staminate; (8) staminate spikelet displaying four male flowers, the filaments of two of them having lost their anthers; (9) pistillate spikelet displaying a single pistillate flower; (10) achene with the 3-lobed double cup underneath.

CAREX.--(11) Plant of C. pauciflora; (12) a staminate flower with its scale; (13) scale, and (14) mature pistillate flower, in its perigynium; (15) cross section of perigynium and of the contained achene; (16) achene on its stalk, style and stigmas.--(17) C. Jamesii, upper part of flowering plant; (18) the spike enlarged; (19) a staminate flower and its scale; (20) pistillate flower in its perigynium; (21) the same with half the perigynium cut away to show the contained achene and style.

EXPLANATION OF PLATE VI.

CAREX.--(1) C. trisperma, upper part of a stem in fruit; (2) enlarged spike displayed, with three staminate and two pistillate flowers; (3) a scale, and (4) a ripe perigynium, of the latter; with (5) a section of the perigynium near the base, and of the contained achene.--(6) C. straminea, var. brevior, summit of a fruiting plant; (7) a spike enlarged; (8) scale of a pistillate flower; (9) the winged perigynium and the contained achene cut across; (10) detached achene with persistent style and stigmas.--(11) C. umbellata, whole plant; (12) a perigynium and its scale; (13) cross-section toward the base of perigynium and its contained achene; (14) detached achene with its persistent style and stigmas.--C. bullata; (15) upper part of plant in fruit, with one pistillate and two staminate spikes; (16) one of its staminate flowers with the scale; (17) a pistillate scale, and (18) mature perigynium; (19) longitudinal section of the latter, showing the achene and its style, and (20) cross-section of the same.

EXPLANATION OF PLATE VII.

LEERSIA.--(1) Panicle of L. oryzoides, reduced in size; (2) a branchlet of the same, with its spikelets, of the natural size; and (3) an open spikelet in flower, enlarged.

ZIZANIA.--(1) A staminate, and (2) a pistillate flower or spikelet of Z. aquatica; (3) a magnified pistil with a pair of squamulae or hypogynous scales; (4) a grain, and a magnified longitudinal section of the lower part of the same, showing the embryo at the outside of the base of the albumen.

ALOPECURUS.--(1) Part of a plant of A. geniculatus, in flower; (2) a few spikelets from the spike-like inflorescence, moderately magnified; (3) an open spikelet in flower, more magnified, and (4) the single flowering glume detached.

PHLEUM.--A detached spikelet of P. pratense, having the flower with its glume and palet raised above the empty glumes, magnified.

HELEOCHLOA.--(1) Inflorescence of H. schoenoides; (2) a separate enlarged spikelet; and (3) the same open, in flower.

SPOROBOLUS.--(1) A spikelet of S. cryptandrus, magnified; (2) the same, with the flower open, raised above the empty glumes; and (3) the fruit, more magnified, showing the seed loose in the pericarp (utricle).--(4) An enlarged spikelet of E. vaginaeflora; and (5) the same displayed.

AGROSTIS.--(1) Panicle of A. alba, var. vulgaris, with (2) an enlarged open spikelet of the same; also (3) the rough pedicel and glumes of A. scabra, with the flower separated, the latter having no palet.

EXPLANATION OF PLATE VIII.

POLYPOGON.--(1) Spike-like contracted panicle of P. Monspeliensis; (2) an enlarged detached spikelet, showing the long awns to the empty glumes; (3) the same open in flower; and (4) a separate flower without the empty glumes.

CINNA.--(1) A magnified spikelet of C. arundinacea; and (2) the same open, displaying the flowering glume and palet, the single stamen, and the pistil.

MUHLENBERGIA.--(1) A magnified closed spikelet of M. sylvatica; (2) the same with the open flower raised out of the empty glumes.--(3) A magnified spikelet of M. diffusa; (4) its minute and unequal empty glumes more magnified; and (5) an open spikelet of the same.

BRACHYELYTRUM.--(1) A spikelet of B. aristatum enlarged; (2) the same displayed.

CALAMAGROSTIS.--(1) An open spikelet of C. Canadensis, enlarged, displaying all the parts; (2) the same with the flower raised out of the empty glumes, showing the hairy rudiment behind the palet.

ORYZOPSIS.--(1) An open magnified spikelet of O. asperifolia; and (2) the flower of the same removed from the empty glumes. Notice the remarkably long squamulae or hypogynous scales, which here nearly equal the glume in length.

STIPA.--Empty glumes and flower (a little separated) of S. avenacea, enlarged.

ARISTIDA.--A spikelet of A. purpurascens, enlarged.

EXPLANATION OF PLATE IX.

SPARTINA.--(1) Portion of the inflorescence of S. stricta, of the natural size; (2) a spikelet enlarged; and (3) the same displaced, the flower raised above the empty glumes.

CTENIUM.--(1) Spike of C. Americanum; (2) a single spikelet magnified; and (3) the same displayed, the empty glumes separated.

BOUTELOUA.--(1) A portion of the compound spike of B. racemosa, of the natural size; and (2) a spikelet displayed and magnified, the flowers raised out of the empty glumes.

GYMNOPOGON.--(1) Inflorescence of G. racemosus, reduced in size; and (2) a magnified spikelet with the parts displayed.

CYNODON.--(1) Inflorescence of C. Dactylon, of digitate spikes; (2) a spikelet magnified and displayed, showing a perfect flower and a rudiment.

ELEUSINE.--(1) One of the spikes from the digitate inflorescence of E. Indica; (2) a magnified spikelet; (3) the same with the flowers more displayed; (4) a flower from the last, showing its parts; (5) the fruit magnified, showing the seed loose in the utricle; and (6) the wrinkled seed detached.--(1, under _Dactyloctenium_) Inflorescence of E. AEgyptiaca, of digitate spikes; (2) one of the spikelets magnified; (3) the fruit magnified, showing the seed loose in the thin pericarp (utricle); and (4) the wrinkled seed more magnified.

DIPLACHNE.--(1) Small portion of the inflorescence of D. fascicularis; (2) one of its spikelets displayed and magnified; (3) an open flower of the same.

EXPLANATION OF PLATE X.

TRIODIA.--(1) Magnified spikelet of T. seslerioides; (2) the same displayed and the lowest flower open; (3) back view of the flowering glume spread out.

GRAPHEPHORUM.--(1) A magnified spikelet of G. melicoides, displayed; (2) a part of the hairy rhachis and one flower of the same.

DIARRHENA.--(1) A spikelet of D. Americana, enlarged; (2) the grain in its glume and palet.

DACTYLIS.--A spikelet of D. glomerata magnified and displayed.

KOELERIA.--(1) A magnified spikelet of K. cristata, expanded, showing the empty glumes, the three flowers, and a rudiment; (2) lower half of a flowering glume, partly spread open; it is much more folded and keeled in its natural condition.

EATONIA.--A magnified spikelet of E. obtusata, expanded, showing the empty glumes, the two flowers, and a rudiment.

MELICA.--A magnified spikelet of M. mutica, expanded, showing the empty glumes, two perfect flowers, and an abortive one.

GLYCERIA.--(1) A magnified spikelet of G. nervata; (2) a separate flower with one joint of the rhachis; and (3) the lower half of a flowering glume, showing its form (rounded on the back, not keeled).

DISTICHLIS--(1) A pistillate spikelet of D. maritima, enlarged; (2) a flower from the same; and (3) a flower from a staminate spikelet.

POA.--(1) Panicle of P. compressa, reduced in size; (2) a magnified spikelet; (3) a separate flower more magnified; (4) a flowering glume cut across and somewhat outspread.

ERAGROSTIS.--(1) A spikelet of E. pilosa, enlarged; (2) the same, from which the glumes and all of six lower flowers except the palets have fallen away; (3) a magnified flower, open; (4) the flowering glume of the same outspread.

BRIZA.--(1) A spikelet of B. media, enlarged; (2) a separate flower.

FESTUCA.--(1) A spikelet of F. elatior, enlarged; (2) a separate flower; (3) lower part of a flowering glume, outspread.

BROMUS.--(1) A spikelet of B. secalinus, or Chess; and (2) a separate flower, enlarged.

EXPLANATION OF PLATE XI.

UNIOLA.--(1) A spikelet of U. latifolia, of about the natural size; (2) a flower, enlarged; (3) empty flowering glume of the lowest (sterile) flower.

PHRAGMITES--(1) A spikelet of P. communis, enlarged; (2) one of the perfect flowers, enlarged; and (3) the lowest flower, which has stamens only.

ARUNDINARIA.--(1) A spikelet of A. macrosperma; and (2) a separate flower, magnified.

SCHEDONNARDUS.--(1) Portion of the spike of S. Texanus, enlarged; and (2) a flower, magnified.

LOLIUM.--(1) Portion of the spike of L. temulentum; and (2) a separate flower, magnified.

AGROPYRUM.--(1) Portion of the spike of A. repens, or Couch-Grass, of about the natural size; (2) a flower, magnified.

HORDEUM.--(1) The three one flowered spikelets from one joint of the spike of H. jubatum, with their awn-like empty glumes, the lateral flowers abortive and neutral, the middle one alone perfect; (2) this perfect flower (with an awn-like rudiment) open and enlarged.

ELYMUS.--(1) The two spikelets of one joint of the spike of E. Virginicus, about the natural size; (2) the empty glumes and the flowers of one spikelet, enlarged and displayed; and (3) an open flower, more magnified.

GYMNOSTICHUM.--(1) A spikelet of G. Hystrix; and (2) an expanded flower, magnified.

ASPRELLA.--(1) A spikelet of A. Hystrix; and (2) an expanded flower, magnified.

EXPLANATION OF PLATE XII.

DESCHAMPSIA.--(1) Panicle of D. flexuosa; (2) a spikelet, magnified, the parts displayed; and (3) one of the flowers detached and open.

DANTRONIA.--(1) Panicle of D. spicata; (2) a spikelet enlarged; and (3) a separate flower from the same.

TRISETUM.--(1) A spikelet of T. subspicatum, var. molle, expanded and magnified; and (2) a separate open flower.

AVENA.--(1) A spikelet of A. striata, displayed and magnified; and (2) a separate flower.

ARRHENATHERUM.--A spikelet of A. avenaceum, displayed and magnified; (1) the empty glumes; (2) the flowers, the lower one staminate only, the next perfect, and the third a rudiment.

HOLCUS.--(1) A spikelet of H. lanatus, magnified; (2) the same displayed to show the two flowers, the lower perfect and awnless, the upper staminate and awned.

EXPLANATION OF PLATE XIII.

HIEROCHLOA.--(1) A spikelet of H. borealis, enlarged; (2) the same displayed, the flowers separated from the empty glumes, the two lateral ones with 3 stamens and no pistil, the middle or terminal one with a pistil and only 2 stamens.

ANTHOXANTHUM--(1) The spike-like inflorescence of A. odoratum; (2) a spikelet magnified; (3) another with the parts displayed, the flowers raised from the lower empty glumes, the lateral glumes empty and awned, the terminal flower perfect and diandrous.

PHALARIS.--(1) A spikelet of P. arundinacea, enlarged, (2) the empty glumes, and a perfect flower with a hairy rudiment on each side of it.

MILIUM.--(1) Portion of the panicle of M. effusum; (2) a closed spikelet, magnified; and (3) the same displayed.

AMPHICARPUM.--(1) A spikelet from the panicle of A. Purshii, magnified; (2) the same, with the parts displayed; and (3) a radical (fertile) spikelet, enlarged.

PASPALUM.--(1) Inflorescence of P. laeve; (2) a closed spikelet, enlarged; (3) the same with the parts displayed.

PANICUM.--(1) Part of a spike of P. sanguinale; (2) one of its spikelets, magnified; (3) the same with its parts displayed, the three lower glumes empty.--(4) A spikelet of P. capillare, magnified; (5) the same displayed, the three lower glumes empty.--(6) A spikelet of P. clandestinum, magnified, (7) the same displayed, the lower flower represented by a glume and palet only.--(8) A spikelet of P. virgatum, magnified; (9) the same displayed, the lower flower staminate.

SETARIA.--(1) A magnified spikelet of S. glauca, with the accompanying cluster of bristles, (2) the spikelet displayed, showing the neutral lower flower, of a glume and palet only, and the perfect flower.

EXPLANATION OF PLATE XIV.

CENCHRUS.--(1) Involucre of C. tribuloides, in flower, enlarged; (2) longitudinal section of the same; (3) a spikelet displayed (the stigmas should belong to the right-hand flower; the left-hand or lower flower is only staminate).

TRIPSACUM.--(1) Piece of the spike (of the natural size), pistillate below, staminate above; (2) a longitudinal section of one of the pistillate spikelets; (3) a pistillate spikelet with its parts displayed; (4) a staminate (two-flowered) spikelet, with its parts displayed.

ERIANTHUS.--(1) Part of the hairy inflorescence with two spikelets of E. saccharoides, enlarged; (2) one of the spikelets displayed.

ANDROPOGON.--(1) Small portion of the spike of A. furcatus, enlarged, with one fertile and awned spikelet, and one staminate and awnless spikelet; (2) the fertile spikelet, and (3) the staminate spikelet, displayed.

CHRYSOPOGON.--(1) A fertile spikelet of C. nutans, enlarged, with a sterile pedicel on each side; (2) the spikelet displayed.

EXPLANATION OF PLATE XV.

BECKMANNIA.--(1) Inflorescence of B. erucaeformis, var., reduced in size; (2) a spike, enlarged; (3) a spikelet, and (4) the same opened; (5) the flower.

ERIOCHLOA.--(1) Inflorescence of E. polystachya, reduced; (2) a spikelet, enlarged, and (3) the same opened; (4) the flower opened.

ROTTBOELLIA.--(1) Portion of the spike of R. rugosa, somewhat reduced, and (2) a portion enlarged, with (3) the fertile spikelet and (4) the pedicelled sterile spikelet of the middle joint displaced; (5) the fertile spikelet opened; (6) the third empty glume, and (7) the flower.

AMMOPHILA.--(1) Inflorescence of A. arundinacea, reduced; (2) a spikelet, enlarged, and (3) the flower, with a hairy rudiment at the base of the palet.

LEPTOCHLOA.--(1) Inflorescence of L. mucronata, reduced; (2) portion of rhachis of a spike, bearing two spikelets; (3) a 3-flowered spikelet; and (4) a flower removed.

BUCHLOE.--(1) Staminate and (2) pistillate inflorescence of B. dactyloides; (3) a staminate spikelet, and (4) one of its flowers removed; (5) a pistil late spikelet, enlarged; (6) vertical section of same; and (7) the outer empty glume removed.

MUNROA.--(1) Inflorescence of M. squarrosa; (2) a spikelet, enlarged; and (3) a flower, opened.