36 ERICACEAE 



5258; Fort Bragg, Mathews; Samoa, Humboldt Co., Davy 6184; Lake Earl, Del Norte Co., Euby 

 Van Deventer 73. Aleutian Isls. : Iliuliuk, Jepson 162. 



Refs. — Arctostaphylos tjva-ursi Spr., Syst. 2:287 (1825) ; Jepson, Man. 748 (1925). Ar- 

 tijilus uva-ursi L., Sp. PI. 395 (1753), "in Europa frigida, Canada." Vva-ursi uva-ursi Britt. ; 

 Britt. & Brown, 111. Fl. ed. 2, 2 :693 (1913). Branchlets of plants of the California coast line vary 

 from subglabrous to microscopically puberulent, lightly pubescent or rarely subtomentulose. Per- 

 sistence of pubescence varies markedly in one narrow locality. The var. coactilis Fer. & Mcbr. 

 (Rhod. 16:212, — 1914) is a form in which the minute tomeutum of the branchlets is persistent. 



2. A. pumila Nutt. Dune Manzanita. Stems prostrate with ascending 

 branches 4 to 8 inches high, forming somewhat coarse or rough mats 2 to 5 feet 

 broad ; branchlets and rachises puberulent ; leaf -blades obovate, aeutish, dull green 

 and glabrous above, finely puberulent and pale beneath, 5 to 9 lines long ; pedicels 

 nearly glabrous; corolla lYz lines long; ovary glabrous or nearly so; berries red- 

 dish or red-brown, globose or globose-oblong, smooth, glabrous, 2 to 3 lines in diam- 

 eter; nutlets 3 to 5, rugulose on back. 1 or 3-nerved. 



Sand hills and pine woods, 5 to 100 feet : shores of Monterey Bay ; San Francisco. 

 Feb.-Apr. 



Locs. — Carmel, Parish; Monterey, Jepson 5702; Del Monte Heights, F. G. WoodcocTc ; Sea- 

 side, F. G. IT oodcocic ; San Francisco, Kellog/j 4' Harford 70 (ace. H. F. Copeland in herb.). 



Refs. — Arctostaphylos pumila Nutt., Trans. Am. Phil. Soc. ser. 2, 8:266 (1843), type loe. 

 Monterey, Nuttall; Jepson, Man. 748 (1925). Uva-ursi pumila Abrams, N. Am. Fl. 29:100 

 (1914). 



3. A. hookeri Don. Monterey Manzanita. Low shrub, % to 2 feet high, or 

 sometimes pi-ocumbent or creeping ; branchlets, petioles and rachis puberulent or 

 minutely canescent ; leaves bright green, shining, tliinnish, glabrous or nearly so, 

 the blades ovate or elliptic, shortly acute, mucronate, 7 to 12 lines long; flower- 

 clusters small; pedicels glabrous; corolla 1% lines long; ovary glabrous; berry 

 globose or depressed, glabrous, 2 to 2^4 lines broad ; nutlets distinct, small, dorsally 

 ridged. 



Small colonies in sand dunes or in open woods near the coast, 10 to 400 feet : 

 San Francisco ; hills and dunes bordering Monterey Ba'y from Santa Cruz to the 

 Carmel River ; San Luis Obispo coast. Mar. -Apr. 



Locs. — Laurel HiU, San Francisco, Eastwood; Mt. Davidson, Blasdale; San Bruno Hills; 

 Capitola; Pajaro Hills, Chandler 430; Elkhorn (hills e. of), Monterey Co., W. S. Cooper 27-6; 

 Carmel, Jepson 2615 ; Sau Simeon, K. Brandegee. 



Eefs. — Arctostaphylos hookeri G. Don, Gen. Hist. Dichl. Plants 3:836 (1834), erroneously 

 stated as "native of Chili," but certainly California, since citing Arctostaphylos pungens H. & A., 

 Bot. Beech. 144, which rests on California plants collected by Lay 4' Collie, undoubtedly at Monte- 

 rey; Jepson, Man. 748 (1925). Uva-ursi hool-eri Abrams, N. Am. Fl. 29:95 (1914). A. frauds- 

 cana Eastw., Bull. Torr. Club 32:201 (1905), type loc. Laurel Hill, San Francisco, Eastwood. 



4. A. nummularia Gray. Fire Manzanita. (Fig. 296.) Erect shrub. 1 to 5 

 feet high, or diffuse or procumbent ; ultimate branchlets and petioles reddish-brown, 

 puberulent and bearing scattered spreading stifflsh hairs or bristles ; leaves thickly 

 clothing the branchlets ; leaf -blades orbicular to ovate or oblong, serrulate, abruptly 

 acute or curved-apiculate, glossy above, finely reticulate-veiny beneath, glabrous 

 or nearly so, or sparingly bristly-ciliate, 5 to 7 (or 10) lines long, on petioles 1/2 

 to 1 line long; flower parts in 4s ; corolla white, 1 to 2 lines long; ovary pubescent 

 or white-hairy ; berry oblong, glabrous or nearly so, 2 lines long. 



Pine barrens, or on shaly or rocky slopes in the mountains, 20 to 2500 feet : Men- 

 docino coastal plain from Fort Bragg to Albion ; Mt. Tamalpais ; Santa Cruz Mts. 

 Feb.-Mar. 



Field note. — Arctostaphylos nummularia' is a characteristic species of the Pinus muricata- 

 Castanopsis chrysophylla formation of the Mendocino coastal plain. In this locality it varies in 

 habit. Usually the stems from the root-crown are many, which is a notable feature. They are 

 quite erect but arise from a decumbent base and bear numerous branchlets, thus forming a dense 

 roundish or depressed low bush 1 to 3 (or 5) feet high. Sometimes, however, the stems are wholly 



