63 



Fig. 41. Oryzopsis juncea (Mx.) B. S. P. {Oryzopsis canadensis Torr.) 

 SMALL MOUNTAIN RICE.— a, Empty glumes; b, a floret showing the blunt 

 callus at the base, the broad palea and snort awn. Other species of this genus 

 are illustrated by Figs. 92 to 97, in Bui. 7, and 441, in Bui. 17. 



41. ORYZOPSIS Michx. Fl. Bor. Am. 1 : 51. 1803. (Eriocoma Nutt. 1818.) 

 Spikelets 1-flowered, hermaphrodite; rachilla articulated above the empty 

 glumes, and not produced behind the palea, usually extended below the 

 flowering glume into a short and obtuse callus. Glumes 3, usually nearly equal, 

 obtuse or acuminate-pointed; the 3d or flowering glume a little shorter or a little 

 longer than the upper empty ones, rather broad, cartilaginous, or becoming 

 coriaceous in fruit, and terminated by a slender, deciduous awn. Stamens 3. 

 Styles distinct; stigmas plumose. Caryopsis free within the hardened fruiting 

 glume. Slender, perennial grasses, with flat or convolute leaves, and loosely- 

 flowered, spreading or narrow panicles. 



Species about 15, in the north temperate zone of both hemispheres. 



