40 ERICACEAE 



(1925). A. pungens var. platyphylla Gray, Syn. Fl. 2:28 (1878), type from "California, espe- 

 cially northward." A. platyphylla Ktze., Rev. Gen. PI. 2:385 (1S91; the preface to the set pre- 

 sumably written "im September," and thus the volumes probably published later). Uva-ursi 

 patula Abrams, Bull. N. Y. Bot. Gard. 6:433 (1910). A. patula var. incarnata Jepson, Madrono 

 1:80 (1922), type loc. Dunsmuir, E. P. Kelley. 



9. A. stanfordiana Parry. Myacoma Manzanita. (Fig. 297.) Erect shrub 

 3 to 6 feet high with slender dark red stem-s ; leaves glabrous, bright green on both 

 faces, the blades narrowly ovate to oblanceolate, most frequently acute at both ends, 



1 to 11/2 inches long, very erect; branchlets, peduncles and rachis glabroiLS or ob- 

 scurely or microscopically glandular-puberuleut ; flowers light pink to lilac ; corolla 



2 to 3 lines long, very frequently with an obscure constriction just below the middle ; 

 ovary glabrous; berry very small, usually much depressed and commonly unsym- 

 metrical or irregular, or sometimes globose, glabrous, usually a bright apple-red 

 when first mature, lYo to 3 lines high, 3 to 4 lines broad ; nutlets broader than high, 

 commonly 3-nerved and rugulose on back. 



Mountain summits and ridges, 1000 to 3500 feet : Del Norte Co. ; Yollo BoUy 

 Mts. (both sides) ; Mayacamas Range (both sides) ; south to the Napa Range; also 

 in Hoods Peak Range (north end) ; Mt. Diablo. Jan. -Feb. 



Field note. — Arctostaphylos stanfordiana keeps to the summits of ridges and plateaus and 

 is often associated with A. manzanita in the Napa Range. On Howell Mt. it is found on a white 

 clay derived from a volcanic tuff. It is a smaller shrub than Arctostaphylos manzanita, and has 

 bright green shiny leaves which are different in aspect from the dull green leafage of A. man- 

 zanita and smaller. Arctostaphylos stanfordiana is shallow-rooted and is killed outright by fire 

 and depends solely upon its seeds for holding its territory. Seedlings show marked vitality in 

 repossessing a fire-burned area. The berries are small and commoniy irregular in shape, sometimes 

 singularly unsymmetrical as if without definite form, or typical only in deformation. While they 

 are usually depressed, they may also be produced upwards. "When fully mature they are of a 

 peculiar dark red color. 



Locs. — Gasquet, Del INforte Co. ; Red Rock, ne. of Round Valley, Mendocino Co., Jepson; Mt. 

 Hull; Forty Dollar Mt., Mayacamas Range, Jepson 9239; Mendocino Range (sw. of Ukiah), 

 Jepson 7629; Franz Valley, w. of Calistoga, W logins 5768; Mt. St. Helena, Jepson 14,724; La 

 Jota, Howell Mt., Jepson 14,723; Sycamore Creek (head of), Mt. Diablo, Jepson 9653. 



Refs. — Arctostaphylos stanfordiana Parry, Bull. Cal. Acad. 2:493 (1887), type loc. 

 "mountain slopes in the vicinitv of Calistoga," that is, in the Napa Range, Parry ; Jepson, Univ. 

 Cal. Mag. 2:102, pi. (1896), Fl. W. Mid. Cal. 371 (1901), ed. 2, 314 (1911), Man. 747 (1925). 

 Vva-ursi stanfordiana Abrams, N. Am. Fl. 29:96 (1914). A. laevigata Eastw., Leafl. W. Bot. 

 1:76 (1933), type loc. Mt. Diablo (half-way up on old south side road), Eastwood 11,082; 

 rachises and branchlets "minutely puberulent," — specimens of A. stanfordiana from the type 

 region are, however, often microscopically puberulent. A. hispidula Howell, Fl. Nw. Am. 415 

 (1901), type loc. Gasquet (w. of), Del Norte Co., Howell; closelv related to A. stanfordiana 

 (Eastwood, Lflts. W. Bot. 1:115). A. densiflora M. S. Baker, Lflts. W. Bot. 1:31 (1932), type 

 loc. Vine Hill School, 10 mi. w. of Santa Rosa, M. S. Baker 5045 ; the author of the species com- 

 pares it carefully with A. stanfordiana. 



10. A. elegans Jepson. Konocti Manzanita. Erect shrub 5 to 10 (or 12) 

 feet high ; bark a lively red-brown ; herbage glabrous ; leaf -blades elliptic to ovate, 

 obtuse or acute, bright green, 1 to 1% inches long; petioles 3 to 4 lines long; rachis 

 microscopically puberulent, the pedicels glabrous ; panicle ample ; flowers white, 



3 lines long ; ovary thickly papillate-glandular ; berry depressed-globose, 6 to 7 lines 

 broad, 4 lines high, all over minutely stipitate-glandular or muriculate-glandular ; 

 nutlets 5 to 7, 2 or 3 consolidated. 



Wooded or brushy slopes, 2000 to 4200 feet : Coast Range mountains bordering 

 Clear Lake and south to Mt. St. Helena. Mar. 



Hist. note. — Arctostaphylos elegans was first collected in 1892 on the obsidian ridges about 

 Mt. Konocti along the old wagon trail from Lower Lake to Kelseyville. The exact locality is at 

 a point on the southwest side of the sprawling lower slopes of the moimtain where the road ap- 

 proaches nearest the main mountain mass. Many years later it was found on the east slope of 

 Mt. St. Helena (Eastwood, in 1902) and in recent years (1928) on the southwest slopes of Snow 

 Mt. in northern Lake Co. (M. S. Baker 3127c). It does not crown-sprout and is, in this respect, 



