282 ERICACEAE. 



385. KALMIA. 



Evergreen mostly smooth shrubs with alternate or opposite 

 entire coriaceous leaves; flowers showy, solitary or in corymbs; 

 calyx 5-parted; corolla 5-lobed; filaments long and filiform; 

 capsule globose, 5 -celled, many-seeded. 



Kalmia polifolia Wang. (K. glauca Ait.) Shrub, 30-60 cm. high, not 

 much branched; leaves oblong, the margin revolute, shiny green above, glau- 

 cous beneath, 2-3 cm. long ; flowers in simple flat-topped corymbs ; sepals ovate ; 

 corolla purple, 12-18 mm. broad. 



In sphagnum bogs, very showy when in bloom. The western plant is 

 considered by Small to be distinct from the eastern species, under the name 

 K. occidentalis Small. 



Kalmia polifolia microphylla (Hook.) Piper n. comb. (K. glauca micro- 

 phylla Hook.) Smaller; stems 15-20 cm. high; leaves 1-2 cm. long; corolla 

 8—12 mm. broad. 



In swamps at high altitudes in the Cascade Mountains. 



386. RHODODENDRON. 



Shrubs or small trees; leaves mostly alternate, entire; flowers 

 large and showy, in umbelled clusters from terminal buds; calyx 

 small; corolla bell-shaped or funnelform, with 5 lobes, regular or 

 irregular ; stamens as many or twice as many as the corolla-lobes ; 

 capsule 5-celled, 5-valved, many-seeded. 



Leaves evergreen; inflorescence terminal; flowers pink. R. calif ornicum. 



Leaves deciduous; inflorescence lateral; flowers white. R. albiflorum. 



Rhododendron californicum Hook. Shrub 2-3 or rarely 5-6 m. high; 

 leaves coriaceous, oblong, slightly revolute, shiny green above, pale beneath, 

 obtuse and mucronate, acute at base, 10-15 cm. long; flowers numerous; 

 calyx-lobes very short, obtuse; corolla turbinate-campanulate, rose-colored, 

 3 cm. long, with broad rounded lobes. 



In open woods, British Columbia to California. Very local in distribution 

 but usually abundant where found. R. macrophyllum Don is an older name 

 which probably applies to our plant. It was collected by Menzies on the 

 " Northwest Coast " and described, probably erroneously, as having white 

 flowers. 



Rhododendron albiflorum Hook. {Azaleastrum albiflorum Rydb.) 

 Shrub, 1-2 m. high, with erect or clustered branches; herbage strigose-pubes- 

 cent and somewhat glandular; leaves membranaceous, oblong, undulate, acute, 

 3-6 cm. long; flowers in small lateral clusters of 1-3, nodding; sepals ovate, 

 glandular-ciliate; corolla creamy-white, open campanulate, 5-lobed, 2 cm. long. 



Common in the mountains at the limit of trees. 



387. MENZIESIA. 



Shrubs with alternate hairy deciduous leaves; flowers small, 

 nodding, greenish-purple, in terminal corymbs or umbels, de- 

 veloped with the leaves; calyx small or minute, flattish, 4-toothed 

 or lobed; corolla cylindrical to urn-shaped, 4-lobed; stamens 8; 

 capsule ovoid, woody, 4-celled, 4-valved, many-seeded. 



