VOL. III.] Botany of Mariposa. 131 



Trisetum canescens Buckl. Frequent below 4,500 feet. Ct. 

 Aira elongata Hook. Same range as last. S. Ct. 

 -VIelica bromoides Gray. Rocky places below 4,000 feet. Devil's 

 Gulch. 



Harfordi Bolander. Common. S. 



aristata Thurb. Frequent, especially above 4,000 feet. S. 

 Poa serotina Ehrh. Darrah. Local. 

 Festuca ovina L. var. duriuscula. Rocky stream beds at 4,500 



feet and above. S. 

 Ceratochloa breviaristata Hook. Frequent. S. 

 Adiantum pedatum L. Wet rocks. ' S. 



Cheilanthes gracillima Eaton. Rocks. Hite's Cove and above. 

 Y. S. 



myriophylla Desv. Devil's Gulch, 3,500 feet and above. S. 

 Asplenium Filix-foemina Bernhardi. Occasional. S. Ct. 



Out of the 122 species enumerated above 75 or more than half 

 e.xtend into the subalpine region, while 24 are also found on the 

 coast without appearing, as far as known, in the intervening terri- 

 tory. It is worth while to notice that of these 24 species 12 are 

 limited to the redwood district which corresponds very closely with 

 our coniferous belt and most of the others are probably stragglers 

 from the same region. 



Adding to these 122 species the 152 native and 40 introduced 

 species which appear in the first list as also belonging to the coast 

 region and the 44 native and 2 naturalized species which begin in 

 the lower zone and extend into this, we have 360 as the number of 

 known species belonging to the coniferous zone. The almost 

 continuous pine forest, which, originally at least, covered the whole 

 of this district, is no doubt the cause of the smaller number of 

 species found here, by preventing that variety of condition and situ- 

 ation which is requisite for producing a great variety of vegetation. 

 Out of the 317 native species found here 23, nearly 8 per cent., are 

 so far as known limited to this zone. 



