414 ERICACE ARBUTUS 
umella. Corolla deciduous,its lobes or petals imbricated in bud. 
* Anthers opening by a pore or chink at the apex of each cell. 
+ Corolla gamopetalous: scaly leaf-buds none: flowers from the 
axils of mostly coriaceo-foliaceous persistent bracts: capsule globular, 
- 4-5-valved from above. ; 
6 Phyllodoce Leaves narrow and imbricated : corolla ovoid. 
7? Bryanthus Leavs narrow, alternate but crowded: corolla open-cam- 
panulate, 5-lobed or parted. 
8 Kalmia Leaves comparatively broad and ample, persistent: corolla 
saucer-shaped, 5-lobed and 10-saccate below the limb. 
- + Flower-buds scaly-strobilaceous, the thin or scarious scales 
caducous or deciduous: corolla gamopetalous: capsule 4-5-valved from 
apex to base. — 
9 Menziesia Shrubs with deciduous leaves: corolla from globular- 
urceolate to cylindraceous, 4-toothed or lobed: stamens not exserted. 
10 Azaleastrum Shrubs with deciduous leaves: corolla subcampanulate, 
regular, 5-lobed: stamens not exserted. 
11 Azalea Shrubs with deciduous leaves: corolla funnelform, slightly 
irregular: stamens exserted. 
12 Rhododendron Shrubs with evergreen leaves: corolla campanulate, 
slightly irregular. 
+ + + Corolla polypetalous or very nearly so. 
18 Ledum_ Shrubs with evergreen leaves: flowers umbellate from sepa- 
rate scaly buds: capsule 5-valved from the base. ~ 
* * Anthers opening from the apex nearly or quite to the base of 
the cell: corolla of distinct petals or deeply 5-cleft : capsule 2-5-valved 
from above. . 
14 Cladothamnus Erect shrubs with deciduous leaves: flowers from 
leafy shoots of the season, solitary : capsule 5-6-celled. 
Tribe 1 Arbutewx DC. vit 581. Trees or shrubs with scaly buds 
and. alternate evergreen leaves. Corolla urn-shaped or globular, 
5-toothed or rarely 4-toothed, decidwous. Stamens twice as many 
as lobes of the corolla, included. Fruit fleshy, either a berry or drupe. 
1 ARBUTUS L. Gen. n. 552. (MADRONO), 
Low trees or shrubs with thick evergreen leaves and small pink 
or white flowers in panicles that terminate the branchlets. Calyx . 
small, 5-lobed, persistent. Corclla ovate, globular, or urn-shaped, 
5-toothed, the teeth recurved. Stamens 10, included: anthers 
flattened, furnished with a pair of reflexed awns on the back be- 
low the summit; the cells opening by terminal pores. Ovary 
raised on a hypogynous disk, 5-celled: ovules numerous on a 
fleshy placente projecting from the inner angle of each cell. 
Style rather long: stigma obtuse. Berries with a rough or gran- 
ular surface, maturing several seeds in each cell. 
A. Menziesii Pursh. Hook. Fl. ii, 36. A tree 20-100 feet high, and 
