386 CALIFORNIA ACADEMY OF SCIENCES. 



view I sliould say, that in the Cerastes section of CeanotJms 

 where the prevailing species have entire leaves, and those 

 less common have them spinose-toothed, young seedlings of 

 the entire-leaved kinds always exhibit the spiny-toothed 

 foliage which, as it would seem, has become permanent in 

 the less common and more depauperate kinds. 



Before passing from the subject of the concentration of 

 Californian t^^pes on Santa Cruz, I will mention one or two 

 further instances of it: that of Zauschneria, the original 

 species of which is found here and there along the north- 

 ward slope only, while the valleys and canons of the interior 

 and at the south side are, in many places, a very garden in 

 the abundance of two large new ones; and lastly, Bloomeriay 

 which, although frequent along our southward mainland 

 districts, is far from ever growing in showy masses. It is 

 common on all parts ot Santa Cruz; but on grassy knolls in 

 the middle of the island it thrives in such abundance that 

 the umbels touch each other over almost acres together. 



Turning now to a different phase of the subject, it is very 

 evident that a goodly number of less common or even rare 

 plants of our southern counties have, within a compara- 

 tively recent period, been given to us from Santa Cruz it- 

 self. Comarostcq^hyUs diversifolia, a rare shrub of the San 

 Diego region, is now found to be one of the common small 

 trees of our island. This is its native land, and the scat- 

 tered and ill-grown individuals of the coast below indicate 

 that out of the island's abundance some of the light woody 

 nutlets drifted thither and germinated. In the spring 

 of 1885, I found a small and slender but well groAvn Bceria, 

 which was new to me, common along the shores of San 

 Diego Bay, not described in any of our books, and which I 

 had intended to publish sooner or later. It is now found to 

 be precisely the peculiar Bceria which abounds on Santa 

 Cruz, and which Mr. Lyon has also brought from San Clem- 

 ente. Still more remarkable is the case of Malacothrix 

 incana^ discovered at San Diego by Nuttall, more than fifty 



