HEATH FAMILY 641 



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

 Jate to urn-shaped, 5-lobed. Stamens 10, included; anthers dehiscent by oblique 



filiform; stigm 



coriaceous testa. 



OoroUa not contracted at the tliroat, open-campanulate. rose-colored to scarlet; sepals 



occur. 



obtuse. 2 p enipctriforhiis 



Corolla urceolate. contracted at the throat. yeUow; sepals acute. 2[ P, glanduli flora. ' 



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

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

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

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

 6-8 mm. long, glabrous. Red or Purple Heather. Mountain sides and 

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



empetriformis X glanduliflora. Where the two species grow together, hybrids often 

 - These are of two forms, both having cylindraceous corolla. On one, P. inter- 

 'fnedia (Hook.) Rydb., the corolla is pink and the sepals acute, in the other, P. hubrida 

 Kyab., the corolla is yellowish and the sepals obtuse. 



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

 subsessile, linear-oblong, obtuse, 4-8 mm, long, 1.5-2 mm, wide, otherwise as in 

 the precedmg; sepals lanceolate, very acute, 4-5 mm. long, glandular-hairy; 

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

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

 Alta. Suhalj). — Alp, Je-Au. 



4. MENZIESIA Smith. 



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

 perfect, in terminal clusters from early buds. C^lyx 4-5-lobed, often obsolete. 

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

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

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

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

 septicidal, 4-valved, 



Pedicels and petioles glandular-pnbenilent; seeds taUed at both ends; leaf-blades obtuse. 



-r. J. 1 J ..,,,,, . 1. M. glabella. 



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



.acute. , 2. M. ferruginca, 



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

 elliptic, 3-6 cm. long, 1-3 cm. wide, green and sparingly short-hairy 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. Suhmont. 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 cyUndro- 

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

 glabrous or with scattered hairs. M. urceolaria Salisb, Woods: Alaska — Ore. 

 — Wyo.— Mont. Submont, — Mont My-JI. 



5. KALMIA L. American Laurel, Swamp Laurel. 



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

 perfect, in terminal or axillary corjTnbs or umbels, with 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 elasticall}' at maturity; anthers 

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

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



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

 leaves opposite, wuth very short petioles; leaf-blades 1-1.5 cm., seldom 2.5 cm. 



