422 ERICACEAE azalea 



RHODODENDRON 



the base by lateral and smaller leaf-buds. Bud-scales and bracts 

 caducous or early deciduous. Calyx small or minute, 5-parted. 

 Corolla funnelform, glandular- viscid outside, with narrow tube 

 and 5-lobed, often more or less 2-lipped limb. Stamens 5, rarely 

 10, exserted, usually declined: anthers attached to the filaments 

 by their backs, the cells opening by terminal pores. Style slen- 

 der, declined exserted. Ovary 5-celled, many-ovuled. Capsule 

 oblong or narrower, 5-valved from the summit. Seeds minute, 

 with a loose chaff- like coat. 



A, occidentalis T. & G. Pacif. R. Rep. iv. 116. Rhododendron occi- 

 dentals Gray. Stems erect, 2-10 feet high, much branched : leaves obovate- 

 oblong, nearly or quite glabrous at maturity but minutely ciliate, bright green 

 and shining above, paler beneath, 1-2 inches long, tapering below to a short 

 petiole, tipped with a short red gland: calyx 5-lobed, the oblong or ovate 

 lobes glandular and ciliate, about a line long, corolla cream-white with 

 orange stripes, 2 inches long, with conspicuous funnelform tube, slightly 

 irregular limb and acute lobes, glandular- viscid outside: stamens 5, exserted 

 and declined: filaments hairy below; style long-exserted, curved upward; 

 capsule oblong, 8-12 lines long. About springs and along streams, south- 

 western Oregon and California. 



12 RHODODENDRON L, Gen. n. 548. 



Shrubs or small trees with alternate evergreen coriaceous leaves 

 and mostly large showy white to rose-colored or purple flowers in 

 terminal umbels or corymbs from scaly buds, the thin scales de- 

 ciduous when the flowers open. Calyx small or minute, 5-lobed 

 or 5-parted, persistent. Corolla campanulate, 5-lobed, nearly 

 regular. Stamens usually 10, little exserted declined or equally 

 spreading : anthers erect, attached by their backs, the cells open- 

 ing by terminal pores. Capsule short or elongated, mostly woody, 

 5-20-valved from the summit. Seeds very numerous and small, 

 with a loose chaff-like coat. 



R. Califor licnm Hook. Bot. Mag. t. 4863. Stems 3-12 feet high, 

 with stout erect 'branches, glabrous: leaves broadly oblong, 3-6 inches long, 

 dark green and shining above: flowers very numerous in the fascicles: calyx 

 minute, slightly 5-lobed: corollas large and showy, rose-color, a little irregu- 

 lar, broadly campanulate more than an inch in diameter, the 5 broad lobes 

 undulate: stamens 10, not exserted, ovary rusty-hirsute: capsule 10-18 lines 

 long. On mountains and along the coast, California to Brit. Columbia. 



R. macrophyllum Don Syst. iii, 843. ■ " Shrub 10 to 15 feet high: 

 leaves oblong, acute at both ends, 5 to 8 inches in length, thinnish: corolla 

 white, less than an inch long: its lobes oblong: ovary bristly hirsute. 

 Woods, Puget Sound Washington to Brit. Columbia." 



-t- -«— -»— Corolla polypetalous or very nearly so. Filaments fili- 

 form. Placentae borne on the summit of the persistent columella. 

 Seed scobiform or linear. 



13 LEDUM L. Gen. n. 546. 



Low shrubs with alternate persistent, more or less resinous- 

 dotted slightly fragrant leaves, and fascicles of white flowers de- 



