50 



ERICACEAE 



Clay or slialy slopes, 500 to 2000 feet : South Coast Ranges from the Oakland 

 Hills to the Santa Cruz Mts. and the Santa Lucia Mts. Feb. 



Biol. note. — The main stem or trunk of Arctost.iphrlos andevsonii, as observed iu the Oak- 

 land Hills, does not thicken at the ground and has not the capacity to sprout from the root- 

 crown. In consequence the shrubs are killed outright by chaparral fires. Mutilation by the axe 

 has similar results. Trunks 4 feet high have been noted which did not regenerate. In morpho- 

 logical characters it is a variable species. It is very variable in size and form of leaf and in 

 character and degree of pubescence. This statement is especially true in its center of distribution, 

 the Santa Cruz Mts. In these mountains also chances to be the locality (Ben Lomond) for the 

 nomenclatorial type of the species. While the leaves are usually markedly cordate at base, some- 

 times they are merely subcordate or obtuse at base. Leaves obtuse at base and leaves subcordate 

 at base may be found on one branchlet. 



Locs. — Oakland Hills, Jepson 5715 ; Pilarcitos Lake, San Mateo Co., Davy 1049 ; Kings Mt., 

 San Mateo Co., C. F. Baker 271 ; Mt. Madonna, s. Santa Cruz Mts., Jepson 9682 ; Pajaro HiUs, 

 Chandler 429 ; Sur ranch, Santa Lucia Mts., Davy 7408. 



Var. auriculata (Eastw.) Jepson. Leaves mostly 

 % to l^i inches long, the blades elliptic, entire, cordate, 

 sessile, usually canescent. — Mt. Diablo region : Antioch, 

 K. Brandegee ; Sycamore Creek (head ot), Jepson 9662. 

 Var. pechoensis (Dudley) Jepson. Bishops Man- 

 ZANITA. Branchlets puberulent and bristly (as in the 

 type collection) or merely tomentulose; leaf -blades % 

 to IVi inches long; pedicels mostly glabrous. — Near the 

 San Luis Obispo coast : Cuesta Pass, Santa Lucia Mts. ; 

 San Simeon ; Morro Bay. 



Var. viridissima (Eastw.) Jepson comb. n. Leaf- 

 blades bright green, auriculate at base or truncatish, 

 subsessile, % to 1 inch long ; stems hairy. — Hills along 

 the Santa Barbara coast (Lompoc; Pt. Sal); Santa 

 Rosa Isl. ; Santa Cruz Isl. ; Santa Catalina Isl. (betw. 

 Avalon and the Isthmus, Wolf 3626). 



Eefs. — Akcto.staphylos andeesonii Gray, Proc. 

 Am. Acad. 11:83 (1876), type loc. Ben Lomond, Santa 

 Cruz Mts., Anderson: Jepson, Fl. W. Mid. Cal. 371 

 (1901), ed. 2, 313 (1911), Man. 750, fig. 731 (1925). 

 IJva-ursi anderson ii Ahrams, N. Am. Fl. 29:98 (1914). 

 A. imbricata Eastw., Proc. Cal. Acad. ser. 4, 20:149 

 (1931), tjTie loc. San Bruno Hills, Cantphell 4' Meiere. 

 A. pallida Eastw., Lflts. W. Bot. 1:77 (1933), type loc. 

 Oakland Hills opposite East Oakland, W. W. Carruth. 

 A. regismontana Eastw., Lflts. W. Bot. 1:77 (1933), 

 type loc. Kings Mt., San Mateo Co., Sutliffe; corolla 

 pink or white. Var. aurioi'L.4TA Jepson, Madrono 1 :88 

 (1922) ; Jepson, Man. 750 (1925). A. auriculata Eastw., 

 Bull. Torr. Club 32:202 (1905), type loc. trail above 

 Uva-ursi auriculata Abrams, N. Am. Fl. 29:98 (1914). 

 Var. PECHOENSIS Jepson, Madrono 1:89 (1923) ; Jepson, Man. 750 (1925). A. pechoejisis Dud- 

 ley; Abrams, N. Am. Fl. 29:98 (1914), type loc. head of Wild Cherry Canon, San Luis Obispo 

 Co., Dudley. Uva-ursi pechoensis Abrams, I.e. Var. viridissim.4 Jepson. A. pechoensis var. 

 viridissima Eastw., Lflts. W. Bot. 1:62 (1933), type loc. China Harbor, Santa Cruz Isl., /. T. 

 Howell 6368. A. confertiflora Eastw., I.e. 1:122 (i934), type loc. Black Mt. (s. of), Santa Eosa 

 Isl., Ralph Hoffmann. 



23. A. insularis CTi-eene. Island Manzanita. Shrub 6 to 10 (or 16) feet high; 

 branchlets glandular-puberulent and with short spreading glandular bristles ; leaf- 

 blades ovate to elliptic or oblong, obtuse or rarely subacute at apex, mostly truncate 

 at base, bright green, nearly glabrous, % to 2 inches long; peduncles and rachises 

 glandular-puberulent ; pedicels bearing spreading glandular hairs ; flowers in a 

 large panicle of elongated racemes, leafy-bracteate at base ; bracts small ; sepals 

 with searious timbi'iate gland-tipped margins; corolla white; ovary white-woolly; 

 berry depressed-globose, yellowish-brown, nearly glabrous, 3 to 6 lines broad, 2 to 

 3 lines high ; nutlets distinct, only slightly ridged. 



Dry rocky slopes, 10 to 1000 feet : Santa Cruz and Santa Rosa islands. May- 

 July. 



Fig. 299. Arctostaphylos andee- 

 sonii Gray. a. fl. branchlet, X % ; 6, 

 long. sect, of fl., X 2 ; c, stamen, X 3. 



the Boyd Eanch, Mt. Diablo, Eastwood. 



