DECANDRI A.— MONOGYNI A. 1 83 



I. rosmarinifolia : leaves linear, conspicuously revo- 



lute. nearly green beneath. 

 HAB. Sphagnous swamps. Shrub low ; ieav. 2 tin. 



broad; umbel, term. 



284. RHODODENDRON. Mountain-laurel. Rhodo- 

 dendracece. 



* Flowers pentandrous. 



1. R. nudiflorum: flowers somewhat naked; leaves 



lanceolate-oblong, nearly smooth, and green on 

 both sides ; the midrib bristly beneath ; margin cili- 

 ate ; flowers not viscous ; tube longer than the 

 divisions ; teeth of the calyx short, somewhat 

 rounded ; stamens much exseried. 

 HAB. Woods and copses. May. Shrub 2—6 ft. 

 high; fl. in term, dust., red. 



2. R. viscosum: flowers leafy ; branches hispid ; leaves 



oblong-obovate, acute, smooth and green on both 

 sides, ciliate on the margin ; midrib bristly ; flowers 

 viscous ; tube as long again as the segments ; teeth 

 of the calyx short, rounded ; stamens scarcely 

 longer than the corolla. 

 HAB. Wet woods. June. Shrub 4— £ ft. high ; fl. 



wh.y viscous, sweet-seen. 

 /3. glaucum : leaves glaucous beneath. 

 K. calendulaceum : flowers : somewhat naked ; leaves 

 oblong, pubescent on both sides, at length hairy ; 

 flowers not viscous; teeth of the calyx oblong: 

 tube ofthe corolla hairy, shorter than the segments. 

 HAB. Pennsylvania. May. Shrub 2- 6 ft. high; 

 fl. large, flame-col. 

 L R. arborescent: flowers leafy; leaves obovate, ra- 

 ther obtuse, smooth on both sides, glaucous be- 

 neath, ciliate on the margin ; nerves almost smooth. 

 flowers not viscous ; tube longer than the seg- 

 ments ; calyx leafy, with the segments oblong, 

 acute ; filaments exserted. 

 HAB, Mountains. Shrub 10— 20 ft. high ; fl. large, 

 rose-col. ; scales of the fl.-buds ycll-br., with a cil. 

 white bord. 

 5. R. nitidum: Bowers leafy; branches somewhat 

 «mooth ; leaves oblanceolat«', submucronate, co- 



