328 CALIFORNIA ACADEMY OF SCIENCES. 



Collected near the head of Willow Creek. This is an 

 extension of its range, although to be expected; since this 

 flora is similar in so many respects to that of New Mex- 

 ico and Arizona, where this species is found, according 

 to Vasey. (Gr. of the U. S., 11.) 



159. Sporobolus airoides Torr., in Marcy's Rep., 300. 

 Collected near the head of Willow Creek. It is said 



to be poor fodder for horses. 



160. Equisetum laevigatum A. Br. in Sillim. Journ., 



87 (1844). 

 (Reference not accessible). 

 Collected near the head of Willow Creek. 



161. Adiantum capillus-veneris L. 



This cosmopolitan species, found in Europe, Asia, 

 Africa, North and South America, was seen in only one 

 locality, the marshy ground above the pool at Butler 

 Spring. 



162. Chara . 



Collected in the pools near the head of Willow Creek. 



