622 GRAMINE^E. (GRASS FAMILY.) 



Stamens 3. Stigmas pencil-form, purple. Root perennial. Leaves short and 

 flat, thickish, l'-3' long. (Name composed of yvpvos, naked, and Trco-yeoi/, a 

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



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

 (1 high), wiry, leafy; leaves oblong-lanceolate; spikes flower -bear ing to the base 

 (5' -8' long), soon divergent ; awn of the abortive flower shorter than its stalk, 

 equalling the pointed glumes, not more than half the length of the awn of the 

 fertile flower. (Anthopbgon lepturoides, Nutt.) Sandy pine-barrens, New 

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



2. G. brevifdlius, Trin. Filiform spikes long-peduncled, i. e. flower-bear- 

 ing only above the middle ; lower palet ciliate near the base, short-awned ; awn 

 of the abortive flower obsolete or minute; glumes acute. (Anthopbgon brevifolius & 

 filifdrmis, Nutt.) Sussex County, Delaware, and southward. 



21. CYNODON, Richard. BERMUDA or SCUTCH-GRASS. (PI. 9.) 



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

 flower, imbricate-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. Palets pointless and awnless ; the lower larger, boat-shaped. 

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

 short flattish leaves. (Name composed of KVO>V, a dog, and oSouy, a tooth.) 



1. C. DACTYLON, Pers. Spikes 3 - 5 ; palets smooth, longer than the blunt 

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



22. DACTYLOCTENTUM, Willd. EGYPTIAN GRASS. (PI. 9.) 



Spikelets several-flowered, with the uppermost flower imperfect, crowded on 

 one 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- 

 fuse, often creeping at the base. (Name compounded of SaKruAos, finger, and 

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



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

 (Chloris mucronata, Michx.) Cultivated fields and yards, Virginia, Illinois, 

 and southward. (Adv. from Afr. ?) 



23. ELEUSINE, Gsertn. CRAB-GRASS. YARD-GRASS. (PI. 9.) 



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

 spiked on one side of a flattish rhachis ; the spikes digitate. Glumes 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 flowers much as in Poa. (Name from 'EXevaiV, the town where Ceres, the 

 goddess of harvests, was worshipped.) 



