178 



PANICACE^. 



Spikelets lanceolate- oblong, 3.5 mm. long, loosely imbricate. . 4 

 Spikelets semiovate. 1.5 mm. long 5 



1. H. Virginicus (Willd.) Britton, Trans. N. Y. Acad. Sci. 9: 14 

 [reprint 13] (1889). White Rice. Leersia Virginica Willd. Sp. 

 PI. 1 : 325 (1797). 



X. Virgmica Michx. Fl. Bor. Am. 1 : 37 (1803). 



Asprella Virginica R. & S. Syst. 2:266 (1817). 



Culms 40-70 cm. hig'n, often nearly smooth. Rootstocks 5 mm. 

 diam., covered with closely imbricated scales. Leaf-blades 5-12 

 cm. long. Spikelets linear-oblong, 3 mm. long, scarcely imbri- 

 cate, in slender simple panicles, the compressed floral glume curv- 

 ing to one side, becoming concave next to the axis, to whicli it is 

 closely appressed; floral glume and palea ciliate. Stamens 2. 



Michigan, Cooley, Clark 686, Beal 27, 28; North Carolina, 

 McCarthy; Minnesota, Holzinger 12; South Dakota, Duff eg; 

 Texas, Reverchon 1036, 



Wet woods, Canada to Florida and westward. 



2. H. oryzoides (L.) Mieg, Poll. Hist. PL Palat. 1 : 52 (1776). 

 RiCE-cuT Grass. Rice's Cousin. 



Phalaris oryzoides L. Sp. PI. 

 55 (1753). Ehrhartia clandestina 

 Wigg. Fl. Holsat. 695 (1780). As- 

 jn^ella oryzoides Lam. 111. 1 : 167 

 (1791). Leersia oryzoides Sw. Fl. 

 Ind. Occ. 1:21 (1797). Oryza 

 clandestina A. Br. Asch. Fl. Brand. 

 799 (1864). 



Culms 60-150 cm. high. Root- 

 stocks narrow, with internodes 2-3 

 cm. long. Leaf-blades 15-20 cm. 

 long, 10-25 mm. wide, supplied 

 Panicles 15-20 cm. long, with cal- 



FiG. 37. — Homalocenchrus oryzoides. 

 A. spikelet; a, floret. (Scribner.) 



with stout recurved prickles, 

 lous glands inside the base of the rays. Spikelets oval, flat, some- 

 what ciliate, 5 mm. long. Stamens 3. 



