622 GRAMINEiE. (GRASS FAMILY.) 



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

 flat, thickish, l'-3' long. (Name composed of yvfivos, naked, and Trayoii', 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-bearing 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. brevifblius, Trin. Filiform spikes long-peduncled, i. e. flower-bear- 

 ing only above the middle ; lower palet ciliate near the base, short-a^vned ; awn 

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

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



21. CYNODON, Eichard. Bermuda or Soutch-Gkass. (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 difliisely-branched and extensively creeping perennials, with 

 short flattish leaves. (Name composed of Kvaii/, a dog, and obois, a tooth.) 



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

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



22. DACTYLOCTENIUM, WiUd. Egyptian Gkass. (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 haKTvKos, finger, and 

 KTfv'iov, a little comb, alluding to the digitate and pectinate spikes.) 



1. D. jSEgyptIacum, Willd. Spikes i-f>; leaves ciliate at the base. 

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

 and soutliward. (Adv. from Afr. 1) 



23. EIiEUSINE, Gairtn. Ceab-Grass. Yard-Gkass. (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 'EXeucri'i/, the town where Ceres, the 

 goddess of harvests, was worsliipped.) 



