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. 



