HEATH FAMILY 319 



24. Arctostaphylos cinerea Howell. Waldo Manzanita. Fig. 3717. 



Arctostaphylos cincrca Howell, Fl. N.W. Amer. 416. 1901. 



Erect shrub, 1-2 m. high, densely branched from the base, bark rather light reddish brown, 

 young branchlets cinereous. Leaves 2.5-3.5 cm. long, oblong to oblong-ovate, or obovate, ob- 

 tuse to acute at apex, narrowed at base to flattish petiole, pallid and cinereous ; bracts acummate- 

 lanceolate, cinereous, only the very lowest f oliaceous ; pedicels longer than the bracts, glandular- 

 pubescent'; corolla tinged with rose, 6-7 mm. long; fruit depressed-globose, pubescent at least 

 when young. 



Drv hillsides and mountain slopes, Arid Transition Zone; Josephine County, Oregon, to Del Norte 

 County,' C-ilifornia. Type locality: "Rocky hillsides along the eastern base of the Coast Mountains, near Waldo, 

 Oregon'." April-May. Del Norte Manzanita. 



Arctostaphylos parvifdlia Howell, Fl. N.W. Amer. 416. 1901. Erect shrub, branching from the base, 

 old branches polished and dark red-brown, young branchlets minutely white-tomentose. Leaves mostly less 

 than 2 5 cm long, oblong to cuneate-oblong, obtuse or acutish, light gray-green; petioles flattened: bracts 

 triangular, short-acuminate, minutely pubescent; pedicels not longer than the lower bracts, mmutely pubescent; 

 ovary and fruit glabrous. Gravelly hillsides, Josephine County, Oregon, to Del Norte County, California. 

 Type locality: near Andersons, Josephine County. 



25. Arctostaphylos canescens Eastw. Hoary Manzanita. Fig. 3718. 



Arctostaphylos cajiescens Eastw. Froc. Calif. Acad. III. 1: 84. 1897. 

 Arctostaphylos strigosa Howell, Fl. N.W. Amer. 417. 1901. 

 Arctostaphylos bractcata Howell, loc. cit. 

 Uva-ursi canescens Heller, Cat. N. Amer. Fl. ed. 3. 276. 1914. 



Shrub 1-2 m. high, stems not enlarged at base and fire-killed, dark red, young branchlets 

 densely canescent. Leaves when young densely white-tomentulose or the margins rose-colored, 

 becoming glabrate in age, oblong-ovate to ovate, 3-4 cm. long, thick and pallid ; panicles short, 

 densely flowered; bracts foliaceous, generally longer than the hairy pedicels; corolla white; 

 ovary densely white-hairy ; fruit depressed-globose, 7-8 mm. broad. 



Gravelly ridges. Humid Transition and Upper Sonoran Zones; Siskiyou Mountains, southern Oregon to the 

 Coast Ranges of central California. Type locality: Mount Tamalpais, Mann County, California. Jan.-March. 



Arctostaphylos canescens var. sonomensis (Eastw.) J. E. Adams ex. McMinn, 111. Man. Calif. Shrubs 

 409 1939 (Arctostaphxlos sonoyncnsis E^stv!. Leaflets West. Bet. 1 : 78. 1933) Erect shrub with spreading 

 branches, about 1 m. high, not stump-sprouting; young branchlets viscid-puberulent. Leaves oblong to ovate- 

 lanceolate, 2-3 cm. long, acute, pale green and sparsely pubescent; panicle congested; bracts foliaceous, 

 exceeding the glandular pedicels; fruit viscid-pubescent. Type locality: Rmcon Ridge, near ijanta Rosa, 

 Sonoma County, California. 



Arctostaphylos candidissima Eastw. Leaflets West. Bot. 3: 124. 1942. Shrub 1-2 m. high with densely 

 white- velvety young stems and leaves; leaves oblong to broadly oval; flowers m short racemes; bracts foliaceous; 

 ovary densely velvety. Hillsides in the Coast Ranges, Mendocino and Tehama Counties to Lake, Napa, and Olenn 

 Counties, California. Type locality: Log Spring Ridge, Tehama County. 



26. Arctostaphylos silvicola Jeps. & Wiesl. Silver-leaved Manzanita. Fig. 3719. 



Arctostaphylos silvicola Jeps. & Wiesl. ex. Jepson, Erythea 8: 101. 1938. 



Erect shrub 1.5-2.5 m. high with silver-gray foliage and smooth dark red bark, branchlets 

 densely tomentose, rarely with a few scattering short-hirsute hairs. Leaves elliptic to broadly 

 oblong or rarely oblanceolate, 1.5-3.5 cm. long, obtuse to round-cuneate at base, acutish to 

 rounded and rather prominently apiculate at apex, usually densely grayish tomentose beneath, 

 thinly tomentose and greener above; petioles 3-6 mm. long; nascent inflorescence drooping, 

 usually with 2-5 racemose branches; bracts foliaceous, tomentose; pedicels nearly or quite 

 glabrous ; corolla white, 6-7 mm. long ; ovary glabrous or sparsely pubescent at the summit ; fruit 

 nearly globose, light brown, 6-8 mm. broad, glabrous ; nutlets separating. 



Sandv soils. Humid Transition Zone; on old marine sand deposits in the vicinity of Mount Hermon, 

 Santa Cruz Mountains, California. Type locality: near Felton Big Trees, Santa Cruz County. Feb.-March. 



Arctostaphylos glutinosa Schreiber, Amer. Midi. Nat. 23:620. pi. 1. fig. 2. 1940 Shrub 6-12 dm. 

 high with polished red-brown trunk and branches, without enlarged burl-like base and hre-kiUed, young 

 branches densely gray-tomentulose and minutely viscid-glandular with intermingling whitish bristle-like hairs. 



Sonoran and Humid Transition Zones; Santa Cruz Mountains, west of Bonnie Doon Ridge, California. lype 

 locality: about 2 miles southwest of Eagle Rock, Santa Cruz County, California. 



27. Arctostaphylos obispoensis Eastw. Serpentine Manzanita. Fig. 3720. 



Arctostaphylos obispoensis Eastw. Leaflets West. Bot. 2: 8. 1937. 



Erect shrub 1-2.5 m. high with gray-green foliage and smooth dark red-purple bark, branch- 

 lets gray-tomentulose or pilose-tomentose. Leaves ovate to ovate-lanceolate, 2^ cm. long, trun- 

 cate or subcordate, or sometimes rounded at base; petioles 3-5 mm. long; bracts foliaceous, 

 linear-lanceolate, the upper little-reduced, tomentose, spreading and recurved in fruit ; pedicels 

 glabrous ; corolla pinkish white, 6-7 mm. long ; ovary glabrous ; fruit globose, 6-7 mm. broad, 

 light brown ; nutlets separating. 



Serpentine outcrops. Upper Sonoran Zone; Coast Ranges San Luis Obispo County and southern Mon- 

 terey County, California. Type locality: serpentine area on the upper elevations of Chorro Creek, near ban 

 Luis Obispo. Feb.-March. 



