RHODODENDRON 



165 



d. Buds brown 

 d. Buds rosy 



b. Buds pubescent 



c. Low shrub to Im.high 

 c. Much taller shrubs 



d. Twigs reddish 



d. Twigs buff or gray 



e. Twigs tomentulose, at 

 least near the tip 



e. Twigs sparsely strigose- 

 hirsute 



f.Pedicels glandless or 



nearly so 

 f. Pedicels copiously 



glandular 



4.R. calendulaceum 

 5.R. nudiflorum 



3.R. canadense 



4.R, calendulaceum 



6.R. roseum 



5,R. nudiflorum 



7.R. viscosum 



1. R. maximum L. Rhododendron. Great Laurel. Large 

 evergreen shrub or small tree to 12 m. high, the young branch- 

 lets pubescent; leaves 10-20 cm. long, thick, acute at both ends. 

 Moist woods, mostly in the mountains, Georgia to West Virginia 

 and Nova Scotia (Fig. 242). 



2. R,. catawbiense Michx. Mountain Rose Bay. Spreading 

 evergreen shrub or small tree 2-6 m. high; leaves oval or oblong, 

 rounded at both ends, 5-15 cm. long. Rocky slopes, in the moun- 

 tains, Georgia and Alabama north to West Virginia (Fig. 243). 



3. R. canadense (L. ) Torr. Rhodora. Shrub to 1 m. high,with 

 strongly ascending branches. Bogs and barrens, Newfoundland to 

 Quebec, south to Pennsylvania (Fig. 244). 



4. R. calendulaceum (Michx. ) Torr. Flame Azalea. Yellow 

 Honeysuckle . Deciduous shrub to 3 m. high, the twigs usually 

 tomentulose, at least near the tips, leaf buds brown, glabrous ex- 

 cept for ciliate scales, the flower buds greenish; capsule linear- 

 oblong, more or less pubescent, 1.5-2 cm. long. Open woods, 

 mostly in the mountains, Georgia and Alabama, north to Penn- 

 sylvania and Ohio (Fig. 245). 



