EOSE FAMILY 219 



Rocky hills and mesas, 2000 to 3000 feet : southern San Diego Co. Lower Cali- 

 fornia. 



Locs. — Campo, Parish 19,318 ; betw. Cottonwood Creek and Potrero, J. T. Howell 2971. 



Eefs. — Cercocarpus minutiflorus Abrams, Bull. Torr. Club 37:149 (1910), type loc. hills 

 near San Dieguito (Bernardo), San Diego Co., Abrams 3376; Jepson, Man. 503 (1925). 



5. C. alnifolius Rydb. Very similar to variants of C. betuloides and perhaps 

 of no more than varietal rank; shrub or small tree, 8 to 16 feet high; leaf -blades 

 elliptic, serrate above the base, subglabrate, 1 to 2 inches long; pedicels 3 to 5 

 lines long. 



Dry hill slopes, 100 to 2000 feet : Santa Catalina and Santa Cruz islands. Mar., 

 fr. July-Sept. 



Locs. — Descanso Canon, Santa Catalina Isl., Parish 10,752; Pelican Bay, Santa Cruz Isl., 

 Mason 4108; Prisoners Harbor, Santa Cruz Isl., Jepson 12,059. 



Eefs. — Cercocarpus alnifolius Eydb. N. Am. Fl. 22:421 (1913), type loc. Avalon, Santa 

 Catalina Isl., Trash; Jepson, Man. 503 (1925). C. hetulaefolius var. tlancheae C. K. Sclin. Mitt. 

 Deutsch. Dendr. Ges. 14:127 (1905), mainly. 



6. C. traskiae Eastw. Catalina Hard-tack. Shrub or small tree 8 to 20 

 feet high; leaf -blades elliptic to suborbicular or broadly ovate, serrulate towards 

 apex, mostly obtuse, % to 2 inches long on petioles 2 to 5 lines long, densely white- 

 woolly beneath, green and minutely pubescent above or at length glabrate, the 

 parallel side-nerves prominent, the margin revolute in age; flowers 4 to 9 in a clus- 

 ter; calyx-tube densely white-woolly, 4 to 5 lines long; calyx 4 lines wide; pedicels 

 1 to 3 lines long; tail of achene 2 to 2i/4 inches long. 



Dry arroyo, south side of Santa Catalina Isl. Mar., fr. Aug. 



Historical note. — Cercocarpus traskiae is an insular endemic remarkable for its extremely 

 localized habitat. It is known on Santa Catalina Island only from the single locality, Salte Verde, 

 where it has been collected only by Blanche Trask. The living individuals are few in number. 

 Under date of Sept. 4, 1909, the collector wrote from Avalon : "I am sending seed and fruiting 

 specimens of my tree which I was fortunate in finding in the best of condition on the finest living 

 tree. Notwithstanding the awful heat I came and went from August 24th to the 27th, tramping 

 by the light of the moon, not venturing to risk the day for crossing the island" (Jepson Corr. 

 31:41, ms.). The flowers are mostly perfect but an occasional flower is wholly destitute of a 

 pistil. The term andro-monoecious thus properly describes the sexual condition. 



Eefs. — Cercocarpus traskiae Eastw. Proc. Cal. Acad. ser. 3, 1 :136, pi. 11, figs. 7a-e (1898), 

 type loc. Salte Verde, Santa Catalina Isl., Blanche TrasTc; Jepson, Man. 503 (1925). 



21. ADENOSTOMA H. & A. 



Evergreen shrubs with somewhat resinous herbage and heath-like foliage. 

 Leaves fascicled, sometimes scattered and alternate, linear, rigid, entire, small and 

 numerous. Flowers small (1% to 2 lines wide), white, crowded on the branches 

 of a terminal and rather close pyramidal panicle. Calyx obconical, 5-lobed, 10- 

 striate. Stamens 10 to 15, inserted 2 or 3 together, alternate with the broad spread- 

 ing petals. Pistil 1. Fruit an achene, covered by the indurated calyx-tube. — 

 Species 2, California and Lower California. (Greek aden, gland, and stoma, 

 mouth, in allusion to the calyx.) 



Leaves fascicled; flowers sessile !• ^- fasciculatum. 



Leaves not fascicled; flowers pediceled 2. A. sparsifolium. 



1. A. fasciculatum H. & A. Chamise. California Greasewood. Spreading 

 shrub 2 to 10 feet high, with virgate branches clothed with leaf -fascicles; old bark 

 grayish- or reddish-brown, shreddy; leaves linear or rather broader towards the 

 apex, 3 t-o 5 lines long; stipules minute; bracts herbaceous, much shorter than the 

 strongly ribbed calyx; stamens equaling the orbicular petals; ovary obliquely 

 truncate. 



Mountain slopes and ridges, mesas and plains, 10 to 5000 feet : cismontane Cali- 

 fornia. South into Lower California. May-July. 



