HEATH FAMILY 49 



pubescent to almost glabrous, non-g-laudular ; flowers white, in compact clusters ; 

 ovary densely pubescent, non-glandular ; berry depressed, 3 to 4 lines in diameter, 

 microscopically and sparingly white-hairy ; nutlets distinct or more or less imited, 

 rugulose. 



Wooded or brushy slopes, ridges and flats, 50 to 2500 feet : along the coast from 

 Mendocino Co. to Del Norte Co. North to Washington. Peb.-Mar. 



Field note. — Arctostaphylos columbiana keeps close to the coast line save that it is found 

 rather generally through the main redwood belt from Mendocino Co. to Del Norte Co. At many 

 stations it has been observed as to reaction to fire: it does not sprout from the root-crowTi. Char- 

 lotte M. Hoak also reports that settlers when clearing land on the Mendocino coast cut off this 

 shrub a foot or two above the ground, leave the trunk for a year or two, and then dig it out, know- 

 ing that it will not stump-sprout. Seedlings are produced very freely. 



The branchlets exhibit two kinds of trichonies, (a) a close or dense tomentulum, from which 

 arise (b) long spreading usually stiffish hairs. These long hairs vary: sometimes they are mod- 

 erate in number, sometimes so long and dense as to be shaggy (the form A. setosissima Eastw.), 

 sometimes scanty and short (Lakeside, Ore., Cooper 135). Sometimes, though infrequently, the 

 long hairs are more or less glandular (Ft. Bragg, Mathews 139; betw. Kennys and Usal, Jepson 

 2155). The form Arctostaphylos tracyi Eastw. of the central Humboldt coast needs special men- 

 tion: the pubescence of the branchlets is fine and close, and the spreading hairs are scanty (Table 

 Bluff, Humboldt Bay, Tracy 6168) or apparently none (Patrick's Pt., Humboldt Co., Tracy 6142) ; 

 the old leaves are remarkably glabrate, as sometimes is the case with shrubs of A. columbiana on 

 the Oregon coast. 



Locs. — Fort Bragg, Mathews 139 ; Kennys sta., Mendocino north coast, Jepson 2155 ; Look 

 Prairie, South Fork Eel River, Constance 638 ; Table Bluff, Humboldt Bay, Tracy 6169 ; Kneeland 

 Prairie, Tracy 6606; Berry's ranch, Eedwood Creek, n. Humboldt Co., Jepson 1953 ; Big Lagoon, 

 n. Humboldt Co., Jepson 9410 ; betw. Camp Six and Gasquet, Del Norte Co., M. S. Balcer 327. 



Yar. virgata (Eastw.) McMinn comb. n. Bolinas Manzanita. Erect shrub, 5 to 8 (or 14) 

 feet high, rather densely leafy ; branchlets, petioles and rachis puberulent and with short spread- 

 ing glandular hairs or bristles, dark-colored ; branchlets with the leaves ascending in close ranks, 

 tending to embrace or half -conceal the panicle; leaf -blades ovate to oblong, acute at apex, acute 

 or obtuse at base, dark green, their midribs and margins glandular-hairy when young, almost gla- 

 brous when mature, 1 to 2 inches long ; petioles short ; panicles very compact ; bracts f oliaeeous ; 

 pedicels glandular-puberulent ; corolla white; ovary densely covered with gland-tipped hairs; 

 berry viscid. — Woods of caiion sides and ridges, 200 to 2000 feet: coastal Marin Co. from Mt. 

 Tamalpais to Point Reyes Peninsula on either side of the San Andreas Fault. Jan.-Mar. 



Field note. — Arctostaphylos columbiana var. virgata is associated with Sequoia sempervirena 

 or grows in its forest borders. It also is found associated with Pinus muricata on the Point Reyes 

 Peninsula which is destitute of E-edwood. There is no evidence of root-crown sprouting in this 

 species. The stem is commonly densely leafy just below the panicle in such a way that this bunch 

 of leaves seems to stand above the dovra-curving panicle which is cylindrically compact and com- 

 paratively few-flowered. The general cast of the herbage is yellow-green. The leaves are thin 

 and somewhat willow-like, and commonly very acute. The following stations validate it: Mt. 

 Tamalpais (s. slope), Geo. D. Allin; Bolinas Ridge, Jepson 10,309; San Geronimo Ridge, Ewan 

 10,176; Inverness, Jepson 502a; Inverness Ridge, Ewan 9376. 



Refs. — ArcotostaphyTjOS columbiana Piper, Fl. Nw. Coast, 279 (1915), type loc. Union 

 City, Mason Co., Wash., Piper 898; Jepson, Man. 749 (1925). A. tomentosa Jepson, Madroiio 

 1:87 (1923), not Lindl. A. setosissima Eastw., Lflts. W. Bot. 1:78 (1933), type loc. Mendocino 

 City, Eastwood; branchlets bristly as well as pubescent. A. tracyi Eastw., I.e. 1:79 (1933), type 

 loc. Big Lagoon, Humboldt Co., Tracy 6141 ; branchlets puberulent, not bristly. Var. virgata 

 McMinn. ^. tnV(7a(a Eastw. ; Sarg., Trees and Shrubs 1:203 (1905), type loc. "Mt. Tamalpais and 

 the hills west of Tomales Bay ; most abundant and characteristic at the lower part of the Boot- 

 jack trail on Mt. Tamalpais not far from Eedwood Caiion," Eastwood. A. glandulosa var. virgata 

 Jepson, Madrono 1:87 (1922), Man. 749 (1925). 



22. A. andersonii Gray. Doctors Manzanita. (Fig. 299.) Erect shrub, 4 

 to 8 (or 14) feet high ; branchlets with copious straight spreading hairs or bristles 

 and with glandular indument ; leaves crowded or almost imbricated on the branch- 

 lets, the blades oblong or ovate, cordate at base or even auriculate, rounded to lance- 

 shaped at apex, entire or serrulate below the middle, puberulent or densely pubes- 

 cent, or becoming glabrous, 1 to 2% inches long, commonly sessile, or sometimes 

 with a petiole 1 to 2 or 3 lines long; bracts mostly f oliaeeous, 2 to 6 lines long; pedi- 

 cels glandular-puberulent; corolla 3 lines long; berry viscid-pubescent. 



