ERICACEAE - - RHODODENDRON' 667 



The L. glandulosum, 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 

 androtncdotoxin. 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 5-lobed, or 5-parted ; corolla 



i bell-shaped, 5-lobed, nearly regular or irregular; stamens 5-10, 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 calif ornicu in, 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 5-lobed; corolla bell-shaped, rose color; capsule 1-1^4 inches long. 



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

 I 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 cata-zi'bicnse 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 californicum 



