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 

 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 5-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 

 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 californicum, 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 

 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 catau-bieuse 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 



