HEATH FAMILY 643 



1.5-3.5 cm. long; pedicels one-flowered; corolla white, about 4 mm. long; fruit 

 scarlet, 7-8 mm. in diameter. Woods: B.C. — Ore. — Ida. Subrnont. Je-Jl. 



9. ARCTOUS (A. Gray) Niedzu. Alpine Bearberhy. 



Low cesjjitose .shrub.s, with shreddy bark and alternate decidvious leaves, 

 clustered towards the ends of the branches. Flowers few, in fascicles from ter- 

 minal seal}' buds. Sepals 4-5, short. Corolla globose-urceolate, 4-5-toothed. 

 Stamens S-10, included; anther-sacs with 2 recurved dorsal awns. Fruit dru- 

 paceous, with 4-5 1-seeded nutlets. [Mairiania Neck.] 



Fruit black; corolla-lobes ciliate; leaves less than 3 cm. long. 1. A. alpina. 



Fruit red; corolla-lobes not ciliate; leaves usually more than 3 cm. long. 



2. A. erythrocarpa. 



1. A. alpina (L.) Niedzu. Depressed-prostrate shrub, with branches 5-12 

 cm. high; leaf-blades spatulate or obovate, tapering below into short petioles, 

 2-3 cm. long, 1-1.5 cm. wide, crenate, strongly veined, glabrous, except the ciliate 

 margin; corolla white or pink; fruit 5-7 mm. in diameter, bluish black when ripe. 

 Arctostaphylos alpina (L.) Spreng. In alpine-arctic localities: Greenl.- — N.H. — 

 B.C. — Alaska; Eurasia. Subalp. — Alp. My-Je. 



2. A. erythrocarpa Small. A depressed shrub, 1-2 cm. high; leaf -blades 

 spatulate, 3-6 cm. long, tapering below into short petioles, crenate, glabrous, 

 not ciliate; corolla white or pinkish, turning yellowish; fruit 7-10 mm. in diameter, 

 bright red. Mountains: Alta. — B.C. — Yukon. Subalp. — Alp. My-Je. 



10. ARCTOSTAPHYLOS Adans. Bearberry, Kinnikinick, 



Manzanita. 



Shrubs or small trees, with alternate, thick, evergreen leaves. Flowers per- 

 fect in terminal, bracteolate racemes, often pendulous. Sepals 5, persistent. 

 Corolla urn-shaped, with 4-5 recurved lobes. Stamens 8-10; filaments dilated 

 and hairy at the base; anthers with 2 reflexed awns on the backs, opening by 

 terminal pores. Ovary 4-10-celled, with a single pendulous ovule in each cell. 

 Fruit drupaceous, either with a 1-8-seeded stone or 1-8 one-seeded more or less 

 coalescent stones. [Uva-ursi Mill.] 



Depressed creeping glabrous plant, with spatulate leaves. 1. A. Uva-ursi. 

 Erect shrubs or trees, 1-6 m. liigh, with oval leaves. 



Young branches puberulent; leaves usually pimgent-cuspidate. 2. A. piingens. 



Branches glabrous; leaves usually not cuspidate. 3. A. platyphylla. 



1. A. Uva-ursi (L.) Spreng. Depressed and trailing, diffusely branched 

 shrub, forming j^atches 1-2 m. across; leaves short-petioled, coriaceous; blades 

 spatulate, entire-margined, obtuse, glabrous or nearly so, 1-3 cm. long, finely 

 reticulate; racemes short and crowded; sepals ovate, acute; corolla ovoid-urn- 

 shaped, white, about 4 mm. long; fruit rather dry, insipid, mealy, red, 6-10 mm. 

 in diameter. Woods: Lab. — N.J. — Colo. — Cahf. — Alaska; Eurasia. Subrnont. 

 —Mont. My-Je. 



2. A. pungens H.B.K. Shrub 1-7 m. high, with puberulent branches; 

 leaf-blades ver^- thick, entire-margined, elliptic or oval, rounded at the base, 

 pungent, acuminate at the apex, glabrous above, minutely puberulent beneath, 

 1.5-3 cm. long; sepals ovate; corolla 5-6 mm. long; fruit 8 mm., rarely 10 mm. in 

 diameter. Wooded moimtains: Mex. — N.M. — s Utah — s Calif . Son. Ap-My. 



3. A. platyphylla (A. Gray) Rydb. Shrub about 1 m. high, with glabrous 

 branches; leaf-blades ovate, entire-margined, merely acute, 2-4 cm. long, thick 

 and light green; sepals ovate, obtuse or acutish; corolla about 6 mm. long; fruit 

 usually 1 cm. or more in diameter. Woody moimtain sides: e Colo. — Utah — 

 CaUf. Son.— Mont. My-Jl. 



Family 99. VACCINIACEAE. Huckleberry Family. 



Shrubs or small trees, or rarely delicate vines. Leaves alternate, simple, 

 sometimes evergreen. Flowers perfect, clustered or solitary. Hj^ianthium 

 well developed, more or less completely enclosing and adnate to the ovary. 



