282 ERICACEAE. 
CASSIOPE. 
(Family Ericaceae). 
Small tufted and trailing 
shrubs: evergreen. Twigs very 
slender, concealed above by the 
overlapping leaves: pith very 
minute. Buds solitary, sessile, 
very small and indistinct. Leaf- 
scars alternate and much raised, 
or opposite and low, minute, cres- 
cent-shaped, with 1 indistinct vas- 
cular bundle: stipule-scars lack- 
ing. Leaves very small, essential- 
ly entire. The subglobose cap- 
sules may be present in winter. 
The species with alternate leaves 
have been segregated as the genus 
Harrimaniella. 
A foliage-key to Cassiope and 
Harrimaniella is given by Coville 
in the second volume of Proceed- 
ings of the Washington Academy 
of Sciences. Winter-characters of 
C. hypnoides are given by Fant, 50. 
1. Leaves opposite, closely imbricated, broad. 2. 
Leaves alternate. 3. 
2. Leaves not grooved on the back. (1). C. Mertensiana. 
Leaves with a groove on the back. (2). C. tetragona. 
3. Leaves widely spreading, broad, blunt. (3). C. Stelleriana. 
Leaves closely imbricated, narrow, acute. 
(4). C. hypnoides. 
