ERICACEAE. 149 



flat leaves ; small purplish gamopetalous urn-shaped slender- 

 stalked terminal flowers ; and small roundish many-seeded cap- 

 sules. 

 Leaves minutely serrulate, obtuse. P. caerulea. 



CASSIOPE. 



Moss-like trailing evergreen shrubs with slender subterete 

 twigs ; more or less flattened spongy pale pith ; opposite raised 

 crescent-shaped minute leaf-scars with a single bundle-trace; no 

 stipule-scars ; minute buds usually developing the first season ; 

 small sessile overlapping leaves ; rather small slender-stalked 

 pale deeply parted cup-shaped gamopetalous flowers at end of 

 the branches ; and found-ovoid small capsules. 

 Leaves linear, acute, upcurved. C. hypnoides. 



LEUCOTHOE. 



Evergreen or deciduous shrubs with brown wood with 

 minute diffused ducts and fine medullary rays ; slender more or 

 less 3-sided twigs ; small somewhat 3-sided continuous pith ; 

 alternate small somewhat raised crescent-shaped leaf-scars with 

 a single bundle-trace ; no stipule scars ; small round buds with 

 several exposed scales ; lance-elliptical short-petioled serrulate 

 leaves ; perfect urn-shaped gamopetalous white flowers in one- 

 sided racemes ; and small depressed-globose many-seeded cap- 

 sules. 



1. Evergreen. 2. 

 Deciduous. 3. 



2. Leaves acute or short-acuminate. L. axillaris. 

 Leaves long-acuminate. L. Catesbaei. 



3. Racemes strongly recurving. L. recurva. 

 Racemes not recurved. L. racemosa. 



ANDROMEDA. Bog Rosemary. 



Evergreen small shrubs with rather shredding bark ; few 

 slender subterete branches ; roundish brown homogeneous large- 

 celled pith ; alternate at first raised crescent-shaped small leaf- 

 scars with i bundle-trace; no stipule-scars; small ovoid sessile 

 solitary buds with 2 exposed scales; entire mostly very revolute 



