222 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



3. HYPOPITYS Adans. 



1. Hypopitys lanuginosa (Michx.) Raf. Pinesap. 



Rich woods; infrequent. July-Sept. Eastern N. Amer. (Monotropa hypopitys 

 of Ward's Flora.) 



The plants are aomewhat • fragrant. A colony of plants in flower is shown in 

 plate 36. 



120. EEICACEAE. Heath Family. 



Leaves evergreen, thick and leathery, persistent in winter. 

 Plants prostrate or very low, not more than 15 cm. high; fruit fleshy, edible. 



Plants prostrate, the stems rooting; leaves entire, with a bitter taste, rough-hairy 

 beneath; flowers borne in clusters at the ends of the branches; fruit green, 

 splitting open and exposing the white pulp 1. EPIGAEA. 



Plants with shallow rootstocks, sending up stems 6-10 cm. high; leaves with a 

 few bristle-tipped teeth, with aromatic taste, glabrous beneath; flowers 



solitary in the leaf axils; fruit red, not opening 2. GAULTHERIA. 



Plants erect, 20 cm. high or more; fruit dry, inedible. 



Larger leaves 3-10 cm. long or smaller; winter flowering buds in branched clusters 

 in the axils of the upper leaves; corolla with 10 small pockets about half 

 way from the base, these holding the 10 stamens bent back by the anthers; 

 style straight, the flower not one-sided ; pods broader than long. . 3. KALMIA. 



Larger leaves 12-15 cm. long; winter flowering buds solitary at the ends of the 

 branches; corolla without pockets, the stamens nol sprung back; style 

 curved, the flower one-sided; pods longer than broad. 



4. RHODODENDRON. 



Leaves deciduous in winter, thin, not leathery. 



Flower clusters from solid winter buds 5 mm. or more in diameter borne at the 

 ends of the branches; corolla 2.5-4 cm. long, with blender tube and widely 

 spreading lobes; stamens and style conspicuously protruding; pods at ma- 

 turity 3-5 times as long as broad 5. AZALEA. 



Flower clusters from solid winter buds much less than 5 mm. in diameter and borne 

 along the sides of the branches, or from racemes expanded in autumn and 

 remaining exposed over winter; corolla less than 1.5 cm. long, narrowest at the 

 mouth; stamens never protruding; pods less' than twice as long as broad. 

 Corolla about 3 mm. long, about as broad as long, covered with short appreased 

 hairs; leaves with appressed hairs on both surfaces; pods with short ap- 

 preased hairs 6. XOLISMA. 



Corolla 6-10 mm. long, much longer than broad, glabrous or slightly glandular; 

 leaves with hairs (if present) not appressed; pods glabrous. 

 Leaves entire; flowers in short clusters from solid winter buds; filaments with 

 an S-shaped bend near the middle, hairy, the anthers without bristles; 



pod longer than broad, narrowed toward the apex 7. NEOPIERIS. 



Leaves minutely serrate; flowers in long one-sided racemes formed in autumn 

 and remaining exposed over winter; filaments straight, glabrous, each 

 anther tipped with^4 bristles; pod broader than long, depressed at the apex. 



8. EUBOTRYS. 

 1. EPIGAEA L. 

 l.'^Epigaea repens L. Trailing arbutus. 



Dry or moist banks and woods. March-Apr.; fr. June. Eastern N. Amer. 

 A flowering plant is shown in plate 37B. 



2. GAULTHERIA L. 

 1. Gaultheria procumbens L. Wintergreen. 



Moist banks or woods; widely scattered but rare. June-July; fr. in autumn, per- 

 sisting through winter. Eastern N. Amer. 



Also known as checkerberry. , 



