554 GRAMINE^E. (GRASS FAMILY.) 



1. O. racem6suS,_Beauv. Culms clustered from a short rootsl >ck (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 fer- 

 tile flower. 1|. (Anthopogon lepturoides, Nutt.) Sandy pine barrens, New 

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



2. G. brevifdlillS, Triu. Filiform spikes long-pedunded, i. e. flower-bear- 

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

 of the, abortive flower obsolete or minute ; glumes acute, ty (Anthopogon brevifo- 

 lius & filiformis, Nutt.) Sussex County, Delaware, and southward. 



2O. CYNODON, Eichard. BEBMUDA GRASS. SCUTCH-GRASS 



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. Paleae 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>J/, a dog, and oSovs, a tooth.) 



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

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



21. DACTYL.OCTIJNIUBI, Willd. EGYPTIAN GRASS. 



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 palea strongly 

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

 ing a loose globular and rough-wrinkled seed. Culms diffuse, often creeping 

 at the base. (Name compounded of bdicruXos, finger, and Kreviov, a little comb, 

 alluding to the digitate and pectinate spikes.) 



1. I>. JEGYPTIACUM, Willd. Spikes 4- 5; leaves ciliate at the base. 

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

 and southward. (Adv. from Afr. ?) 



22. EL.EUSINE, Gaertn. CRAB-GRASS. YARD-GRASS. 



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

 gpiked on one side of a flattish rhachis ; the spikes digitate. Glumes membrar 

 naceous, pointless, shorter than the flowers. Palea3 awnless and pointless ; the 

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

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

 flowers much as in Poa. (Name from 'EAevo-iV, the town where Ceres, the god- 

 dess of harvests, was worshipped.) 



1. E. fioncA, Gsertn. (DOG'S-TAIL or WIRE GRASS.) Culms ascend- 

 ing, flattened; spikes 2-5 (2 f long, greenish). Yfffds, &c., chiefly southward, 

 (Nat. from Ind. 1 ?) 





