HEATH FAMILY 641 



perfect. Sepals normally 5, imbricate, persistent. Corolla open-camprnu- 

 late to urn-shaped, 5-lobed. Stamens 10, included; anthers dehiscent by obUque 

 chinks. Ovar\' 5-celled; style filiform; stigma capitate or obscurely 5-lobed. 

 Capsule subglobose, septicidal, 5-valved to the middle; seeds nmnerous, vdth 

 coriaceous testa. 



Corolla not contracted at the throat, open-campanulat«, rose-colored to scarlet; sepals 

 obtuse. 1. P. empetriformis. 



Corolla urceolate, contracted at the throat, yellow: sepals acut«. 2. P. glanduli flora. 



1. P. empetriformis (Smith) G. Don. Branched shrub, 1-3 dm. high; leaves 

 subsessUe, linear, rather crowded on the branches, 5-12 mm. long, 1-1.5 mm. 

 ■nide, thick, grooved on both sides, glabrous, scabrous, denticulate on the margins; 

 sepals oblong or ovate, obtuse, about 2 mm. long, usually pink or scarlet ; coroUa 

 6-8 mm. long, glabrous. Red or PrRPLE Heather. Moimtain sides and 

 swamps: Alaska — n Calif. — Colo. — Alta. Subalp. — Alp. Jl-Au. 



P. empetriformis X glanduliflora. "Wliere the two species grow together, hybrids often 

 occur. These are of two forms, both ha^-ing cyUndraceoiis coroUa. On one, P. inter- 

 media (Hook.) Rydb., the corolla is pink and the sepals acute, in the other, P. hybrida 

 Rydb., the coroUa is yellowish and the sepals obtuse. 



2. P. glanduliflora (Hook.) Coville. Branched shrub, 1-3 dm. high; leaves 

 subsessHe, linear-oblong, obtuse, 4-8 mm. long, 1.5-2 mm. wide, othem"ise as in 

 the preceding; sepals lanceolate, very acute, -l-o mm. long, glandular-hairy; 

 corolla about 8 mm. long, sulphur-j-ellow and more or less glandular-puberulent. 

 Yellow Heather. Mountain sides and swamps: Alaska — Wash. — Wyo. — 

 Alta. Subalp. — Alp. Je-Au. 



4. MENZIESIA Smith. 



Shrubs, with erect branching stems and alternate deciduous leaves. Flowers 

 perfect, in terminal clusters from early buds. Cah-x 4-5-lobed, often obsolete. 

 Corolla urn-shaped, campanulate or globose, usually 4-lobed. Stamens 5-10, 

 mosth- 8, included; filaments subulate, flattened: anthers linear-sagittate, awn- 

 less, opening by terminal obhque pores or chinks. Disk 8-10-lobed. Ovary 

 4- (rarety 5-) celled; style included; stigma truncate, with 4 or 5 lobes. Capsule 

 septicidal, 4-valved. 



Pedicels and petioles glandular-puberulent; seeds tailed at both ends; leaf-blades obtuse. 



1. M. glabella. 

 Pedicels and petioles glandular-hirsute; seeds merely apiculate at the ends; leaf-blades 

 acute. 2. M. ferruginoa. 



1. M. glabella A. Gray. Erect shrub, 2-3 m. high; leaf-blades obovate or 

 elhptic, 3-ti cm. long, 1-3 cm. wide, green and sparingly short-hair\- above, gla- 

 brous or nearly so and pale beneath; corolla urceolate, 8-9 mm. long: capsule 

 ovoid, about 6 mm. long, glabrous or minutely puberulent. Woods: B.C.— Ore. 

 — Wyo. — Alta. Submont. Je-Jl. 



2. M. ferruginea Smith. Erect shrub, 2-3 m. high; leaf-blades broadly 

 oblanceolate, hirsute-strigose and green above, pale and glabrous -beneath, 

 except the veins and margin, 3-5 cm. long, 1-2.5 cm. wide; corolla cjlindro- 

 urceolate, 8-10 mm. long, Q-7 mm. wide; capsule ovoid, about 8 mm. long, 

 glabrous or with scattered hairs. M. wceolaria Sahsb. Woods: Alaska^Ore. 

 — Wyo.— :Mont. Submont.— Mont. M3--JI. 



5. KALMIA L. American Laurel, Swamp Laurel. 



Evergreen shrubs or trees, with alternate, opposite, or whorled leaves. Flowers 

 perfect, in terminal or axillary cor\-mbs or umbels, v\'ith early deciduous bracts. 

 Sepals 5, persistent, leathery. Corolla rotate, pink or white, with 10 pouches 

 at first enclosing the anthers. 10-keeled and rounded 5-lobed. Stamens 10; 

 filaments shorter than the corolla, straightening elasticaU}- at maturity; anthers 

 awnless, opening by terminal pores. Disk 1-lobed. Ovarj- 5-celled. Capsule 

 globose, depressed at the apex, septicidal, 5-valved. 



1. K. microphylla (Hook.) Heller. Low branched shrub, 1-3 dm. high; 

 leaves opposite, with verj' short petioles; leaf-blades 1-1.5 cm., seldom 2.5 cm. 



