Illustrating The Genera Of Gramineae Part 6 2698 spikelets 2-flowered, outer flower staminate, inner neuter; Illustrating The Genera Of Gramineae Part 6 2699 spikelets 2-flowered, the lower flower abortive; outer glume enclosing the flowers in a cavity of the thick, jointed rachis, with an aperture each side at base, the joints readily separating.

T. dactyloides L. St. slightly compressed, smooth, solid with pith, brown at the nodes, 4 to 6f; lvs. near an inch broad, long, lance-linear, smooth beneath, roughish above; spikes 5 to 8' long, usually 2 to 3 together, digitate, .terminal, evidently unilateral. -Illustrating The Genera Of Gramineae Part 6 2700 River banks and seashores, Mid., W. and S. States. A large, coarse and very singular grass, of little value as food for cattle. β. monostachyon. Spike single.

64. ZE'A, L. Indian Corn. (Gr.Illustrating The Genera Of Gramineae Part 6 2701 to live; as a life supporter of animals and man.) Flowers 8 , awnless; Illustrating The Genera Of Gramineae Part 6 2702 in a terminal panicle of racemes, the spikelets 2-flowered; glumes herbaceous, subequal; pales membranous, upper bifid; anthers 3, linear; Illustrating The Genera Of Gramineae Part 6 2703 partly imbedded in a thick, continuous axillary spike (spadix) which is enclosed in many spathaceous bracts; lower flower of each spikelet abortive; glume broad, thick, membranous, obtuse; style filiform, very long, exserted and pendulous; abortive flower of 2 pales. - Illustrating The Genera Of Gramineae Part 6 2704 Culm solid.

Z. Maya L. Rt. fibrous; culm erect, stout, 5 to 15f, grooved on one side, very smooth and leafy; lvs. ample, linear-lanceolate, 2 to 3f by 2 to 3'. channeled. - The varieties of this noble plant, produced by climate and culture, are numerous. It is native in S. Am., but bow widely cultivated and how important to man we need not write. Every part is known by familiar names. The panicle ofIllustrating The Genera Of Gramineae Part 6 2705 fls. at the summit is the tassel. The spike of the Illustrating The Genera Of Gramineae Part 6 2706 fls. is the ear, its rachis the cob, its pistils the silk, and the bracts of its spathe the husks. The kernels are in 8,10, 12, etc., rows, always some even number, yellow, white, red or spendidly purple.

65. ROTTBŒL'LIA, Brown. (A personal name.) Rat-tail Grass. Spikelets in pairs at each joint of a terete, jointed spike, one sessile in a cavity of the rachis, 2-flowered, the other pediceled, abortive; sessile spikl. with the lower flower abortive; glumes 2, subequal, outer concave, coriaceous, inner thin or hyaline, like the (smaller) pales; stamens 3. - Grass erect, tall.

1 R. campestris Nutt. ? Glabrous; culm simple, slender (2 to 4f), with blackish, somewhat geniculate joints; lvs. very narrow, involute-setaceous; spike solitary, terminal, little thicker than the culm, 2 or 3' long; ped. spikelet obsolete;Illustrating The Genera Of Gramineae Part 6 2707 gl. ovate, acute, faintly impressed-dotted. - La. (Hale.)

2 R. ragosa. Glabrous; culms rather stout, 3 to 5f, erect, branched; lvs. flat, linear; spikes solitary, several, terminal and axillary, 2 to 3', less thick than the base of the culm; ped. fl. of 2 empty glumes;Illustrating The Genera Of Gramineae Part 6 2708 outer gl. ovate, acute strongly reliculately rugous. - Prairies, La. (Hale.) (Apogonia, Nutt.)

66. STENOTAPHRUM, Trin. Spike compressed; spikelets 2-flow-crcd, in pairs at each joint, imbedded, 1 sessile and 1 pedicellate (or in 4s to 6s); glumes membranous, the outer minute, inner large; flowers each of 2 coriaceous pales, similar, but the lowerIllustrating The Genera Of Gramineae Part 6 2709 ; styles 2, slender; stamens 3; grain free. - Illustrating The Genera Of Gramineae Part 6 2710 Culms decumbent, branched joints of spikes not separable.

S. dimidiatum. Glabrous, very leafy; culm 2 to 4f; lvs. flat, broadly linear, on broad, open sheaths; spikes lateral and terminal, solitary, much compressed, 3' by 2 to 3", the rachis flat on the back, spikelets in 2 lateral rows in front, the sessile embraced by the pedicel of the other. - Low grounds, coastward, S. States. Jn. - Sept. (Rottboellia, Thumb. S. Americanum Schrank.)

67. ERIAN'THUS, Rich. Plume Grass. Beard Grass. (Gr.Illustrating The Genera Of Gramineae Part 6 2711 wool, Illustrating The Genera Of Gramineae Part 6 2712 ) Spikelets 2-flowercd, all fertile, in pairs at each joint of the slender rachis, one sessile, the other pedicellate; glumes membranous, subequal, longer than the flowers; pales hyaline, the lower flower of 1 neutral, the upper of 2, perfect, with the lower pale awned; spikelets involucrate at base, with a tuft of bristly hairs. - Illustrating The Genera Of Gramineae Part 6 2713 Stout, erect grasses, remarkable for their large woolly or silky, tawny panicles.

* Hairs of the involucre much longer than the spikelet..............................................


1, 2

* Hairs of the involucre shorter than the spikelet, or nearly none..............................


3, 4

1 3. alopecuroides Ell. Culm 5 to 8 or 10f, erect, stout, silky bearded, especially at the joints; lvs. broadly linear; flat, silky pubescent, 2 to 3f by 1 to '1: pan. dense, cylindric-oblong, very large (12' to 20' long); hairs of the invol. twice longer than the short (2 to 2 1/2') spikelets, a third as long as the straightish awn which is terminal on its pale. - Swampy pools in pine barrens, Va. to Fla. and La. The plume-like panicles are magnificent!

2 E. contortus E1l Culm 4 to 6f, erect, glabrous; lvs. broadly linear, flat, smooth, except a tuft of silky hairs at base; pan. contracted, oblong, 6 to 10'; hairs of the invol. long, silky, thrice longer than the spikelet'(which is 3"), 2/3 the length of the spirally contorted awn which issues from near the base of its deeply bifid pale. - Wet grounds, about Charleston, S. C. to N. Orleans. Pan. of a lighter hue than the last.