SPRI^IG FLORA OF MANHATTAN. 7 



Glumes avviied below the 2-cleft apex Bromus 



d. Spikelets sessile on opposite sides of a zig-zag rhachis. 



1-flowered Hordeum 



8-5-flowered Eh/mus 



PANICUM, L. 

 Lower glume usually small; tliiid glume empty or staminate; fourth 

 glume coriaceous, enclosing a pf-rfect tlower. 



P laxiflorum. Lam. Resembling the next but spikelets scarcely 2 

 mm. long. Prairie la'id 



P. scoparimn/L-dm. Stems usually several, 2-4 dm. high Sheaths 

 hairy. I'aniclH about idm. long Spikelets obovate, obtuse, 3 mm. 

 long; Id ^er iriume roundish, about one-lhird the length of the spikelet. 

 Piairie land, common. 



CHA.VI^RAPHIS, R. i3r.* 

 Spikelets as in Panicimi hut the p^^duncles bearing a few long 

 bristles below the joint. 



C viridis. (L ) Porter. Annual, upright; leaves straight (not 

 twisted as in U glauca). Spike 3-10 cm. long, usually somewhat taper- 

 ing upward. A common weed in cultivated ground. 

 ALOPECURUS, L. 

 Spikelets l-floweifd; lower glumes boat shaped, about as long as the 

 flowering giume which is avvned on the back below the middle. 

 Inflorescence spike-like 



A qeniculatii.^, L. Tufted, 2-4 dm. high, leaves short, the soft spike 

 2-5 cm long, often parLly enclosed in the upper sheath. Moist meadows, 

 frequent. 



AGROSTIS, L 

 Spikelets 1-flowered. Empty glumes usually longer than the flower- 

 ing one, allwithout terminal awns. 



A. Iiiemalis, (Walt ) B. S. P. Slender stems tufted, with a few- 

 short leaves at base, 3-4 dm higk l^auicle large, the branches capillary 

 and in fruit very long and spreading. Lower glume acute, about H mm. 

 long. Dry land, common. 



BULBILIS. Raf. 

 Dioecious; staminate spikelets 2-ranked in 1-sided short spikes, 

 2-3 flowered; spikes 1-3 at the summit of the short stem. Pistillate 

 spikelets 1-flowered in a cluster near the ground, each in the axil of a 

 leaf-like bract. 



B. dacU/loides, (Xutt. ) Raf. A low tufted grass, spreading extensively 

 by stolons. Prairie, frequent. 



EATON I A, Raf 

 Spikelets 2 flowered; empty glumes nearly equal in length but very 

 unequal in shape, lower narrow, upper broad and obovate. 



•It would seem best to retain Sptnria as a genus distinct from the Australian. 

 Chamaernphis, but as the name was used earlier lor a g-enus of lichens, a new name 

 should be g-iven. 



