ERICACEAE. 281 



whitish and resinous-dotted beneath, the midrib and short petiole minutely 

 puberulent as well; corymbs terminal, convex, 3-5 cm. broad; pedicels slender, 

 puberulent and resinous-dotted, recurved in fruit, 1.5-3 cm. long; lobes of the 

 calyx very small, broadly rounded; petals white, oval, 5-6 mm. long, obtuse; 

 stamens 5-7, the filaments sparsely hirsute at base; ovary minutely canescent 

 and resinous-dotted; capsules oblong, acutish. 



In sphagnum bogs, near the mouth of the Columbia River. 



Ledum groenlandicum Oeder. Very similar to L. colnmbianum but less 

 glandular and leaves rusty-woolly beneath. 

 Common in sphagnum bogs. 



383. CLADOTHAMNUS. 



Shrubs with erect branching stems; leaves alternate, narrow, 

 entire, with obscure alternate lateral veins, petioled; flowers 

 perfect, solitary-axillary or in few-flowered corymbose clusters; 

 calyx rotate, with 5 narrow lobes which are much longer than the 

 tube; corolla copper-colored; petals narrow; stamens 10, shorter 

 than the petals; filaments subulate; style elongated, enlarged at 

 the apex; stigma capitate, somewhat lobed; ovary 5-6-celled, 

 lobed; capsule depressed-globose. 



Cladothamnus pyrolaeflorus Bong. Erect shrub about 2 m. high; leaves 

 membranaceous, obovate-lanceolate, obtuse or acutish, usually mucronate, 

 ciliolate when young, 2-4 cm. long, paler beneath; flowers short-peduncled; 

 calyx-lobes oblong-linear, more or less ciliolate; petals coppery-red, 10-15 mm. 

 long. 



Saddle Mountain, near Astoria, Oregon, Gorman; Baldy Peak, Jefferson 

 County, Washington, Lamb; Cascade Mountains, 49th parallel, Lyall, and 

 northward to Alaska. 



384. PHYLLODOCE. 



Low alpine heath-like evergreen undershrubs; leaves numer- 

 ous, linear, obtuse, serrulate; flowers solitary or in umbels at the 

 ends of the branches; calyx free from the ovary; corolla 5-toothed; 

 stamens 10; anthers pointless, shorter than the filaments; fruit 

 a 5-celled 5-valved, many-seeded dry capsule. 



Corolla ovoid, yellowish, glandular. P. glanduliflora. 



Corolla campanulate, red, glabrous. P. empetriformis. 



Phyllodoce glanduliflora (Hook.) Coville. Stems erect, with erect branches, 

 20-40 cm. high; leaves linear-oblong, obtuse, thick, serrulate, 5-10 mm. long; 

 inflorescence glandular; corolla glandular, pale yellow, ovoid, 6-8 mm. long, 

 the tube very short. 



Cascade and Olympic Mountains at about 2500 m. altitude, rarely found 

 growing with P. empetriformis. 



Phyllodoce empetriformis (Smith) D. Don. Much branched, 15-50 cm. 

 high; flowers in umbels; corolla rose-colored, campanulate, 4-5 mm. long, the 

 lobes shorter than the tube. 



Abundant in the mountains at the limit of trees. Very showy when in 

 bloom and locally called " heather." 



