414 ERICACEAE 



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 Bryanthns 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 Meiiziesia 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: etamens 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. 



13 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 Cladothamnns Erect shrubs with deciduous leaves : flowers from 

 leafy shoots of the season, solitary : capsule 5-6-celled. 



Tribe 1 Arbuteas DC. vii 581. Trees or shrubs with scaly buds 

 and alternate evergreen leaves. Corolla urn-shaped or globular, 

 5-toothed or rarely 4-toothed, deciduous. 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. Corolla 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 placentae 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 



