488 PHANEROGAMOUS PLANTS. 



21. TRISETUM, Persoon. 

 1. Trisetum subspicatum, Beauv. 

 Hab. Cascade Mountains, Oregon ; west side. 



2. Trisetum cernuum, Trin. 

 Trisetum cernuum, Trin. in Act. Petrop. 1830, 1, p. 161. 

 Hab. Cascade Mountains, Oregon ; east side. 



22. AY EN A, Linn. 

 1. Avena fatua, Linn. 



Hab. On the Sacramento, California. — This is the well-known "wild 

 oat " of California, so valuable as a forage plant. It has generally 

 been regarded as introduced from Southern Europe, but Mr. Bolander, 

 who has especially noticed this grass, states in Trans. Cal. State Agri- 

 cult, Soc. 1864-65, p. 38, his opinion that it is indigenous. 



23. DANTHONIA, DC. 



1. Danthonia spicata, Beauv. ? 



Hab. Near the mouth of the Spokane. — On the Spipen River there 

 was collected what seems to be a much-reduced form of this species, 

 with the culms about 6 inches high ; sheaths clothed with long spread- 

 ing hairs, and leaves somewhat hairy; the panicle reduced to a single 

 terminal spikelet. General Munro states that he had called this D. 

 unispicata, in Herb. Trin. Coll. Dub., but that he since considered it 

 only an abnormal state of D: spicata. The same was collected by 

 Nuttall in the Rocky Mountains, and is his D. rnonostachya, Nutt, in 

 Herb. Phil. Acad. 



