ERICACEAE — RHODODEN DRON 667 



The L. glandulositm, similar to the above but a taller plant, occurs in bogs of 

 the Rockies. All are more or less poisonous ; one species is known to contain 

 andromedotoxin. Several species are used as a substitute for tea. The Russians 

 use the first named species. It is also said to be used to protect clothes from 

 moths. 



Genera of Ericaceae 



Fruit a septicidal capsule ; anthers unappendaged. 

 Corolla somewhat irregular. 



Corolla slightly 2-lipped, leaves deciduous (Rhododendron- Azalea) 



Corolla campanulate ; leaves evergreen 1 Rhododendron 



Corolla regular. 



Stamens 10; capsule S-celled 2 Kalmia 



Fruit a loculicidal capsule; anthers often awned. 



Corolla cylindrical ; capsule depressed 3 Leucothoe 



Corolla globose or urn-shaped ; capsule globular 



Anthers awned 4 Andromeda 



Anthers awnless 5 Lyonia 



Rhododendron L. Rose Bay 



Shrubs or trees, with deciduous or persistent leaves ; flowers in corymbose or 

 umbellate clusters from scaly cone-like buds; calyx S-lobed, or 5-parted; corolla 

 bell-shaped, S-lobed, nearly regular or irregular; stamens S-10, spreading, de- 

 clined and slightly or not exserted ; anthers opening by terminal pores ; style 

 slender, occasionally exserted and somewhat declined; fruit a woody capsule; 

 seeds numerous. About 100 species, native of cooler regions. Several species 

 cultivated for ornamental purposes. The genus includes Azalea. 



Rhododendron caiifornicum. Hook. California Rhododendron. 



A shrub or small tree from 3-25 feet high, with stout erect branches ; leaves 

 evergreen, broadly oblong, 3-6 inches long; flowers large, in corymbose clusters; 

 calyx S-lobed; corolla bell-shaped, rose color; capsule 1-1/4 inches long. 



Distribution. On the Pacific slope from San Francisco north to British 

 Columbia. 



Rhododendron maximum, L. Rose Bay or Great Laurel 

 A tall evergreen shrub or small tree; leaves 6-10 inches long, thick and 



leathery, oblong-lanceolate, dark green on both sides, with revolute margins; 



flowers in corymbose clusters, pedicels viscid pubescent; corolla bell-shaped, 1 



inch broad, pale rose color or nearly white or spotted with yellowish orange 



dots; fruit an oblong capsule. 



Distribution. In >damp woods from Maine to Ohio and the Alleghenies to 



Georgia. 



Rhododendron catazvbiense Michx. Mountain Rose Bay 

 ? ',, Shrub from 3-6 feet high, or rarely small tree 20 feet high; leaves oval or 

 oblong, mucronate, dark green above, pale or glaucous beneath; petioles stout; 

 , , pedicels rather stout ; corolla broadly bell-shaped, lilac-purple ; petals rusty- 

 brown. 



Distribution. On mountain slopes of Virginia, West Virginia, and Georgia. 

 Poisonous properties. According to Chesnut, Rhododendron caiifornicum 



