622 GRAMINEJS. (grass FAMILY.) 



Stamens 3. Rtijrmas pcnfil-fonn, purple. — Root perennial. Leaves short and 

 flat, thickish, l'-3' lonJ,^ (Xamc toniposcd of yvfju/us, naked, and Troiycoi/, a 

 beard, alluding lo the reduction of the uliortivc flower to a bare awn.) 



1. G. racembsUS, Beauv. Culms clustered from a short rootstock 

 (1° high), wiry, leafy; leaves ohlong-lanceolate ; sjiikes Jtoiver-lieariii;/ to the Ixise 

 (.')'- 8' long), soon divergent; awn of the abortive flower shorter than its stalk, 

 equalling the jKiinted (/luincs, not more than lialf the length of the awn of the 

 fertile flower. (A'nthopogon lepturoidcs, iVu/^) — Sandy pine-barrens, New 

 Jersey to Virginia, and southward. Aug., Sept. 



2. G. brevifbliUS, Trin. Filiform S])ikes long-pcdunded, i. e. flower-bfar- 

 ing only above the middle ; lower palct ciliate near the base, short-awned ; aicn 

 of the aliortivejlower obsolete or minute ; gluitieji acute. ( Anthojwgon brevifolius & 

 filifonnis, Nutt.) — Sussex County, Delaware, and southward. 



21. CYNODON, Richard. Bermuda or Scutch-Gr.vss. (PI. 9.) 



Spikelets 1 -flowered, with a mere naked short-pedicclled rudiment of a second 

 flower, imbricatc-spiked on one side of a flattish rhachis , the spikes usually 

 digitate at the naked summit of the flowering culms. Glumes keeled, pointless, 

 rather unequal. Talets pointless and awnless ; the lower larger, boat-shaped. 

 Stamens 3. — Low difiusely-branched and extensively creeping perennials, with 

 short flattish leaves. (Name composed of kuwc, a dog, and 68ovs, a tooth.) 



1. C. D.icTYLON, Pers. Spikes 3 -.") ; palets smooth, longer than the blunt 

 rudiment. — Penn. and southward ; troublesome in light soil. (Nat. from Eu.) 



22. DACTYLOCTENIUM, Willd. Egyptian Grass. (PI. 9.) 



Spikelets several-flowei-ed, with the uppermost flower imperfect, crowded on 

 o'<" side of a flattened rhachis, forming dense pectinate spikes, 2-5 in number, 

 digitate at the summit of the culm. Glumes compressed laterally and keeled, 

 membranaceous, the upper (exterior) one awn-pointed. Lower palet strongly 

 keeled and boat-shaped, pointed. Stamens 3. Pericarp a thin utricle, con- 

 taining a loose globular and rough-wrinkled seed. — Root annual. Culms dif- 

 fu.se, often creeping at the base. (Name compounded of baKTvKos, Jlmjer, and 

 KTfviov.1 a little comb, alluding to the digitate and pectinate spikes.) 



1. D. ^EGYPTiAtTM, Willd. Spikes 4 -.5; leaves ciliate at the base, 

 (Chloris mucronktii, J//'7/.r.) — Cultivated fields and yards, Virginia, Illinoi.Sv 

 and southward. (Adv. from Afr. !) 



23. ELEUSINE, Gartn. Crab-Grass. Yard-Grass. (PI. 9.) 



Spikelets 2-6-flowered, with a terminal naked rudiment, closely imbricatc- 

 spiked on one side of a flattish rhachis ; the spikes digitate. GliimCs membra- 

 naceous, pointless, shorter than the flowers. Palets awnless and pointless ; the 

 lower ovate, keeled, larger than the upper. Stamens 3. Pericarp (utricle) 

 containing a loose oval and wrinkled seed. — Low annuals, with flat leaves, 

 and (lowers much as in I'oa. (Name from 'EXtvaiv, the town where Ceres, the 

 goddess of harvests, was worshijjped.) 



