ANDHOPOIJONE.E. 61 



15. A. EUiottii Cluipm. Fl. S. States, 5S1 (18(30). 



Culms sU'iitlcr. «3()-S() cm. high, bnmehing, intcniodes long, 

 bearck'd at the upi)er joints. Sheaths often hairy above, inflated by 

 several young or rudimentary sheaths and spikes : lower blades 30 

 cm. long, tliose farther up 'i cm. long, i mm. wide, the ui)per re- 

 duced and threadlike. Spikes 3 or moi-e, about 2 cm. long or 

 tlireadlike, exserted or enclosed, stems zigzag, hairs on racliis and 

 pedicels exceeding the spikelets. First glume of the sessile s})ike- 

 It't hinceolate, membranous, 4 or more mm. long. 2-nerved, margins 

 involute : second glume membranous, compressed-keeled, 1-nerved, 

 third hyaline. 3-4 nmi. long, fourth bifid, with a hout awn about 15 

 mm. long. Sterile floret represented by a threadlike pedicel 4-G 

 mm. long. Stamen 1. 



Florida, Chapman, Curtiss 3G3Ga ; Texas, ycallcy ; District 

 of C oluiubia, Ward. 



Mrginia to Florida and Texas, on wet or dry pine barrens. 



Vai". laxifiorus Scrib. ined. 



Sheaths of spikes shorter and narrower. Spikes 4-6 cm. long, 

 their ijiternodes twice as long as those of the sj^ecies. 



Florida. G. V. Xash 1597 in 1854. 



10. A. Virginicus L. Sp. PI. 104G (1753). A. dissitiflnrnm 

 Michx. Fl. lior. Am. 1 : 57 (1803). A. vayinatuH Ell. Hot. S. 

 C. and Ga. 1 : 148 (1817). 



Plant smooth, or sometimes soft hairy, GO-lOO cm. hijrh. 

 Culms flattened below, })anicle branching much or little. Sheaths 

 inflated, including spikes and slieatlis with spikes inside ; most 

 blades 15-40 cm. long, 2 mm. wide, the upper short. Spikes nearly 

 sessile, slender, zigzag, 2 sometimes 3 together, nearly sessile. 2 cm. 

 long, shorter than the sheaths the upper of which are 3-5 cm. 

 long, the soft dull white hairs on the rachis and peduncles much 

 longer than the spikelets. Sessile spikelet 3-5 mm. long: first 

 glume ovate-lanceol.ite, 2-keeled, 2-nerv(Hl; second glume com- 

 pressed-keeled, 1-nerved, 3 mm. long; third and fourth ghunes 

 shorter and hyaline, the awn straight or slightly twisted and bi-Jit, 

 1.3-2 cm. long. Pedicel slender, 4 mm. long, bearing a rudimen- 

 tary spikelet or not. Stamen 1. 



