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1. S. SETIGERA Presl. Panicle open, with 

 spreading rays; lower palet tubercalate, only 

 tlie nerves hairy. — Common. Summer. 



2. S. EMINENS Cas. Panicle open, with 

 spreading rays; lower palet hairy all over. — 

 Coast Ranges. Summer. 



3. S. VIRIDULA Trin. Panicle u arrow, with 

 short erect rays. — Coast Range. Summer. 



All the species of Stipa are by their long 

 awns more or less injurious to the wool of sheep, 

 which they make impure and intractable. Some 

 species even endanger the life of the animals, 

 as their awns are liable to work their way 

 from the wool through the skin into the lungs. 



12. Deyeuxia Clar. (Calamagrostis Adaus). 



Spikelets 1-flowered, flowers sessile, with a 

 bearded base and the rudiment of a superior 

 flower, reduced to a plumose pedicel. Glumes 

 2, canaliculate, awnless. Palets 2; inferior 

 aristate, superior 2-carinate. — 24!. Leaves flat- 

 tened. Panicles branched. 



1. D. ALEUTicATrin. — San Francisco. Sum- 

 mer. 



13. Spartina Scbreb. Marsh Grass. 

 Spikelets 1-sided, sessile, 1-flowered; flower 

 naked, sessile. Glumes 2, carinate, awnless; 

 the upper embracing the lower, which is much 

 smaller. Palets 2, awnless; the lower com- 

 pressed; the upper laj-ger navicular. Ovary 



