490 CALIFORNIA ACADEMY OF SCIENCES. 



3. A. Nevadensis Gray l. c. 



Confined to tlie alpine districts of the Sierra Nevada, and 

 clearly distinguished in its peculiar habit, from the mount- 

 ain form of A. Manzanita, with which it is occasionally asso- 

 ciated. 



* ^ Erect shrubs, approacJiing arborescent. 



A. Hookeri Don, Gard. Diet. Ill, 836. Gray 1. c. 



Arbutus ? pungens Hook. & Arn. Bot. Beech. 144. 

 Xerobotrys, venulosa Nutt. Benth. PL Hartw. 321. 



Short depressed stems, with erect branches, forming loose 

 clumps 1 — 3 feet in height; young branches and petioles 

 closely pubescent; leaves smooth, bright green on both 

 sides, distinctly veined, ovate, and gradually tapering at 

 base to a slender twisted petiole, cartilaginous-mucronate, 

 and on vigorous shoots ocasionally irregularly mucronate- 

 serrate; inflorescence short-racemose, bracts membranous, 

 attenuate, longer than the smooth pedicels, deciduous in 

 fruit, calyx with thin ciliate margins, corolla small, narrowly 

 urceolate; fruit smooth, yellowish-brown at maturity (July), 

 orbicular, flattened horizontally, deeply umbilicate at base, 

 3 lines broad, 2 lines high, granular pulp rather copious, 

 nutlets separable, rough carinate on the back, and acute at 

 the ventral edge at the base, when less tiian five, one or 

 more coalescing to form a 2 — 3 celled stone. 



Long known from all the early collectors in the vicinity 

 of Monterey, but poorly defined from imperfect fragmentary 

 material. A recent opportunity for field examination affords 

 the means for completing the description. 



5. A. Anderson! Gray L c. 



Apparently limited in range to the Santa Cruz Mountains. 



6. A. tomentosa DongL Graj' L c. excl Southern and Mexican forms. 



This is one of the oldest and best known species, having 

 been fairly well figured, and occasionally seen in cultiva- 



