EMPETRACEAE 83 



plish monoecious apetalous spiked flowers; and small 3-lobed 



capsules. 



Leaves coarsely crenate: flowers at top. P. terminalis. 



Leaves crenately lobed: flowers at base. P. procuinbens. 



Family EMPETRACEAE. Crowberry Family. 

 A small family of low evergreens, chiefly in cold regions. 



EMPETBUM. Crowberry. 



Low matted evergreen shrubs with slender twigs; small 

 raised crescent-shaped leaf-scars with 1 bundle-trace, usually 

 in whorls of 3; no stipule-scars; small round sessile solitary 

 buds with few scales; small narrow crowded entire leaves; in- 

 conspicuous apetalous polygamous flowers; and relatively 

 large berry-like fruits. 



1. Leaves scarcely reflexed: twigs tomentose. 2. 



Lower leaves reflexed: twigs glandular or glabrate. E.nigrum. 



2. Leaves rather spreading: fruit opaque. E. atropurpureum. 

 Leaves ascending: fruit translucent. E. Eamesii. 



COREMA. Broom Crowberry. 



Evergreen low shrubst with slender fluted twigs; minute 

 continuous pith; alternate elevated crescent-shaped minute 

 leaf -scars with a single bundle-trace; no stipule-scars; small 

 globose sessile buds 1 with several exposed scales; miuute ob- 

 long nearly sessile blunt green leaves; small apetalous poly- 

 gamous flowers clustered at ends of the branches; and several- 

 seeded small dry drupes. 

 Leaves minutely serrulate, grooved on both faces. C. Conradii. 



Family ANACARDIACEAE. Sumach Family. 

 A small family, chiefly of warm regions*, yielding mangoes, 

 cashew apples and cashew nuts, pistacio nuts, and the lacquer 

 of Japan; notable among the plants of temperate regions as 

 including the very poisonous poison ivy and poison sumach, 

 the former an attractive but ineradicable climber, and the lat- 

 er an unusually beautiful shrub. 



