296 Ericaceae 
Stamens 4—10; anther-cells opening by terminal pores. Placentae pendulous. Cap- 
sule oval or oblong, septicidal, 5-valved from the base upward. Seed slender; coat 
loose. (Gk. ledon=the name of the Rock Rose, Cistus, from the resemblance. ) 
A. Leaves lanceolate; leaf-margin revolute. 
B. Leaves rusty-tomentose beneath. W. 
L. groenlandicum Oeder 
BB. Leaves glaucous and not hairy beneath. W. 
L. columbianum Pip. 
AA. Leaves oval or oblong, not hairy beneath; leaf-margin not revolute. E. 
L. glandulosum Nutt. 
RHODODENDRON 
Shrubs (ours), or small trees, erect or spreading. Leaves evergreen or deciduous, 
alternate, entire or nearly so. Flowers white or rose-colored or purple, large, in terminal 
umbels or lateral fascicles. Calyx 5-parted or -lobed, minute to large. Corolla funnel- 
form or campanulate, 5-lobed, regular or slightly 2-lipped. Stamens 5 or 10; anther- 
cells opening by pores. Ovary 5—20-celled. Capsule 5—20-valved from tip. Seeds 
many, minute; coat loose, chaff-like. (Gk. rhodon=a rose, dendron—a tree; hence rose- 
tree. ) 
A. Leaves thick, coriaceous, evergreen; corolla rose-colored. W. C. (R. macro- 
phyllum.) P. californicum Hook. (Rhododendron) 
AA. Leaves of ordinary thickness, not coriaceous, deciduous; corolla white or yellow- 
- ish. 
B. Leaves lanceolate or oblong; flowers in lateral clusters of 1—3:; corolla 1.5—-2 
cm. long; stamens 10; capsule 6—8 mm. long. W.C. E. (Aczaleastrum albi- 
florum; Cladothamnus campanulatus. ) 
R. albiflorum Hook. (Small Azalea) 
BB. Leaves obovate-oblong; flowers in terminal umbels; corolla about 5 cm. long; 
stamens 5; capsule 16—25 mm. long. U. (Azalea occidentalis. ) 
R. occidentalis Gray (Large Azalea) 
MENZIESIA 
Shrubs, erect. Leaves alternate, deciduous, entire or serrulate. Flowers small, 
“ greenish or purplish, in terminal clusters. Calyx bristly-hairy, usually 4-lobed. Corolla 
cylindric to globose-urceolate, 4-toothed or -lobed. Stamens usually 8; anther-cells 
opening by oblique cracks or pores, awnless. Stigma 4-lobed or -toothed. Capsule sub- 
globose or ovoid, 4-celled, septicidal, 4-valved. Seeds many, slender. (Honor of A. 
Menzies, surgeon and naturalist under Vancouver.) W.C. E. (M. glabella.) 
M, ferruginea Sm. (Fool’s Huckelberry) 
KALMIA SWAMP LAURBI 
Shrubs, erect, in peat bogs. Leaves entire, coriaceous, evergreen, alternate or op- 
posite (ours) or in whorls of 3, whitish beneath (ours), their margins reflexed (ours). 
Flowers in umbels or corymbs, or |—3 in the axils. Calyx 5-parted or -divided. Co- 
rolla saucer-shaped, 5-lobed, with 10 pouches below the limb, 10 keeled from the 
pouches to the lobes and sinuses. Stamens 10; anthers awnless, in the corolla-pouches ; 
anther-cells opening by pores. Capsule subglobose, obscurely 5-lobed, 5-celled, 5-valved 
