734 Ericaceae Chimaphila 



3. Subfamily Ericoideae 



Margin of leaves entire. 



Leaves sessile or nearly so, generally less than 8 mm wide 



6199. Andromeda, p. 738. 



Leaves petioled, generally more than 8 mm wide. 

 Blade of leaves mostly narrowed at the base. 



Branchlets smooth; leaves glabrous beneath, acute at the apex; corolla saucer- 

 shaped; fruit a capsule 6192. Kalmia, p. 737. 



Branchlets more or less pubescent; leaves more or less pubescent beneath, 



rounded at the apex; corolla usually ovoid or urceolate; fruit a berry 



6212. Arctostaphylos, p. 739. 



Blade of leaves mostly cordate at the base 6205. Epigaea, p. 739. 



Margin of leaves not entire. 



Trees; leaves 10-15 cm long; fruit a capsule 6203. Oxydendrum, p. 738. 



Low shrubs; leaves less than 10 cm long. 



Shrubs rarely over 1.5 dm high; leaves generally in a cluster of 3-5 at the ends 



of the branches, more than 1.5 cm wide; fruit berrylike 



6206. Gaultheria, p. 739. 



Shrubs usually 4-9 dm high; leaves scattered along the branches, generally less 

 than 1.5 cm wide; fruit a capsule 6200. Chamaedaphne, p. 738. 



4. Subfamily Vaccinoideae 



Under surface of leaves and calyx tube with resinous scales; ovary 10-celled 



6215. Gaylussacia, p. 740. 



Under surface of leaves and calyx tube without resinous scales; ovary 4-5-celled 



621 6. Vaccinium, p. 740. 



6166. CHIMAPHILA Pursh 



Leaves mostly cuneate-oblanceolate, the midrib above bordered with whitish green, 

 generally acute at the apex, the taper beginning about the middle of the blade, the 

 margins usually with not more than 8 teeth to a side; dilated part of filaments 

 merely ciliate 1- C. maculata. 



Leaves lanceolate or ovate-lanceolate, the midrib above not bordered with whitish 

 green, rounded or acute at the apex, the taper beginning well above the middle of 

 the blade, the margins with more than 8 teeth to a side; dilated part of filaments 

 villous 2. C. umbellata var. cisatlantica. 



1. Chimaphila maculata (L.) Pursh. Striped Pipsissewa. Map 1565. 

 An infrequent to rare plant of high ground, associated with either black 

 oak or beech. There is a specimen in the herbarium of the University of 

 Illinois collected in 1883 by E. J. Hill in a pine woods near Edgemoor (now 

 in west Gary) . 



Maine (?) and Mass. to Ont. and Minn., southw. to Ga. and Miss. 



2. Chimaphila umbellata (L.) Bart. var. cisatlantica Blake. (Rhodora 

 19: 241. 1917.) (Chimaphila umbellata (L.) Nutt. of manuals in part.) 

 Common Pipsissewa. Map 1566. An infrequent to rare plant of our north- 

 ern counties. I have seen no specimen from south of White County. All of 

 our specimens are from moist or dry, sandy black oak or black and white 

 oak woods. 



N. S. to Ga., westw. to the Pacific coast. 



