CALIFORNIAN MANZANITAS. 489 



1. Fruit with Pyrence distinct, or more or less coalescent. 

 "Low prostrate shrubs. 



1. A. Uva-Ursi Spreng. 



The typical species on which Adanson established the 

 genus as distinct from Arbutus. This author did not how- 

 ever include the species afterwards united as A. alpina, 

 Spreng., which, on account of its very distinct characters, is 

 better referred back to an older genus Mairania, Neck. viz. : 

 31. alpina Desv. 



2. A. pumila Nutt ; Gray, 1. c. 



This species, first collected by Nuttall in 1836, and de- 

 scribed only from leaf specimens, has been long regarded 

 as a doubtful species, and is still imperfectly known. During 

 the present season (1887) the original locality was visited by 

 the writer, on sandy wastes bordering the eastern shore of 

 Monterey Bay. It here forms densely spreading mats, 

 several yards in extent, with assurgent branches, thickly 

 covered with small ovate or spatulate leaves, of a dull green 

 color, lighter beneath, pubescent when young, entire, and 

 short-petiolate; these conceal from view the small clusters 

 of fruit mature in July. The inflorescence is a contracted 

 raceme, with rather conspicuous veiny bracts, shorter than 

 the smooth pedicels, flowers small pinkish-white; the fruit 

 is orbicular, yellowish-brown at maturity, the separable nut- 

 lets closely adjoining, broadly carinate, and smooth on the 

 external face, occasionally partly coalescing into irregular, 

 two-celled stones. In the above characters it is clearly 

 marked as a distinct species, of very limited range, and has 

 been known for several years, from an isolated locality at 

 Lone Mountain Cemetery, San Francisco, where it was first 

 detected by the late Dr. Kellogg, and by him properly re- 

 ferred to the Nuttallian species. 



