276 MONOCOTYLODENOtJS. 



scabrous. Tanicle secund, clustered. Glumes laaceolate, 2-4-flowered. Pd« 

 le<s with the keel cUiate. 



% June— July. In fields. 2-3 feet. 



Genus XXIII BROMUS. 



Glumes 2, usually many Howered, shorter than the florets, 

 which are imbricated in 2 rows. Lower palea cordate, emar- 

 ginate, with an awn sometimes below the summit. Scales 

 ovate, smooth. 



1 B Secalinus. Stem glabrous, swollen at the joints, erect. Leaves pu. 

 Descent on the upper surface, ciliate. Fanicle erect, or nodding, branched ; 

 spikelets oblong-ovate, compressed. Florets about 10, distinct, longer than 

 the bristles. 



# July. Cultivated lands. 2-3 ft. 



2 B CiLiATUS. S/fOT slender, swollen and hairy att^ejonts. leaves and 

 Sheaths hairy. Vanicle nodding. Spikes slender, cylindrical. Glumes pu- 

 bescent. Exterior palea pubescent, ciUate. Awn nearly as long as the valve, 

 interior one much smaller 



3 C PuRGANS. Stem erect, glabrous. Leaves scabrous. Sheaths villous. 



PanicZe nodding, diffuse. Pe<f«nc^s hairy ; spikelets 4-6-flowered. Glumes 

 pubescent, the interior one awned. Exterior palea awned, hairy at the sum- 

 mit. 



% July— September. Mountains. 1-2 ft. 



Genus XXIV POA. 



Glumes 2, usually many flowered. Spikelets compressed. 

 PalecE sometimes woolly at the base. Scales smooth. Pani- 

 cle more or less branchino^, or bcattered. 



■c 



1 P Capillaris. jS^em erect, glabrous. Leaves linear, hairy, short, flat. 

 Sheath longer than the joints, hairy at the throat Tanicle very large, ex- 

 panding, capillary ; spikelets 3-flowered, ovate. Glumes pubescent. Palea 

 pubescent. 



<v) Aug.—Sept. Sandy fields. 1-2 ft. 



2 P Tenuis. Stem somewhat compressed, much branched, glabrous. — 

 Leaves linear, long, scabrous. Throat of the sheath hairy. Vanicle diffuse, 

 capillary; spikelets 1-3-flowered. G'Zames glabrous. PaZe<? glabrous, the ex- 

 terior one keeled. 



%. Aug.—Sept. Upper Car. 12-18 in. 



^3 P HiRSUTA. Stem erect, compressed, glabrous, branching, hairy ai the 

 axils. Leaves glabrous, long, pubescent at the base. Sheath hairy. Glumes 

 glabrous, tinged with purple. 



% Aug— Oct. Dry fields. 1-2 ft. 



4 P Parviflora. Stem simple, decumbent, compressed, leafy. Leaves 

 distichous, flat, glabrous. S/tea«A glabrous. Pa/iic/e diffuse, capillary ; spike- 

 lets generally 3-flowered ; florets obtuse, caducous. 



% July, Shady woods. Middle Car. & Ga. 



5 P CoNFERTA. Stem erect, geniculate, terete, swollen at the joints. 

 Leaves glabrous flat. Fanicles terminal and axillary, erect. Spikelets 8-flow- 

 ered, smooth. Exterior palea with colored veins. 



% July— August. Middle Car. & Ga. 2-3 ft. 



6 P Annua. Stem glabrous, procumbent, geniculate. Leaves glabrous. 

 Tanicle diflfuse. Spikelets usually 4-5-flowered. Glumes slightly pubescent. 



aj} Feb. — April. Cultivated grounds. 6-8 in. 



