KALMIA 169 



sule persistent in winter. 



a. Large shrubs or small trees l.K. latifolia . 



a. Low shrubs 



b. Twigs terete 2.K. angustifolia 



b. Twigs 2-edged 3.K. polifolia 



1. K. latifolia L. Mountain Laurel . Calico-Bush . Shrub or 

 small tree, up to 10 m. high, generally much smaller; twigs gla- 

 brous ; leaves elliptic to elliptic-lanceolate, 5-10 cm. long, acute 

 or short-acuminate; capsule glandular, 5-7 mm. in diameter. 

 Rocky woods, Florida to Louisiana, north to New England, Ohio, 

 and Indiana (Fig. 251). 



2. K. angustifolia L. Lambkill . Sheep-Laurel . Slender shrub 

 up to 1.7 m. high; branches terete, strongly ascending; leaves 

 evergreen, opposite or in whorls of three, flat, thin, oblong to 

 elliptic-lanceolate, glabrous or puberulent, ferruginous when 

 young. Acid soil, Labrador to Manitoba, south to Virginia, Georgia 

 and Michigan (Fig. 252). 



3. K. polifolia Wang. Pale- Laurel. Bog-Laurel. Slender 

 straggling shrub to 7 dm. high, with 2-edged branches; leaves 

 evergreen, opposite or in threes, firm, lanceolate or linear, 0.7- 

 3.5 cm. long, lustrous -green above, conspicuously whitened be- 

 neath. Peat bogs, Labrador to Alaska, south to Pennsylvania, 

 Minnesota, Idaho, and Oregon (Fig. 253). 



ANDROMEDA L. (Ericaceae) 



Evergreen bog shrubs. Twigs slender, somewhat 3-sided; 

 pith small, 3-sided, continuous. Buds small, solitary, sessile, 

 ovoid, subglobose or conical. Leaves alternate, simple, entire. 

 Leaf-scars small, half-round or triangular; bundle-trace 1; stipule- 

 scars none. Fruit a globose capsule persistent in winter. 



1. A. glaucophylla Link JBog Rosemary . Low shrub to 1 m. 

 high, usually little branched; leaves linear or linear-oblong, 

 prominently whitened beneath, 2.5-6 cm. long, the margins strongly 

 revolute; capsule 4 mm. long. Bogs, Greenland to Manitoba, south 

 to West Virginia, Indiana, and Minnesota (Fig. 254). 



PIERIS D, Don (Ericaceae) 



Evergreen shrubs or small trees. Twigs slender; pith ob- 

 scurely 3-sided, continuous. Buds small, globose, the terminal 



