16 ERICACE^. 



10. LEUCOTHOE. Calyx slightly or in one section much imbricated. Filaments sub- 

 ulate : anthers oblong, obtuse, blunt ; the cells opening by a terminal pore or chink, either 

 pointless, or 2-mucronate, or sometimes 1-2-awnecl from the apex : filaments subulate. 

 C'apsule depressed-globose, 5-lobed ; valves mostly thin, entire ; placentae borne on the 

 sunnnit or upper part of the columella. Seeds pendulous or in all directions ; the coat 

 various but usually loose. 



11. CASSANDRA. Calyx of rigid and much imbricated ovate sepals, subtended by a 

 pair of similar bractlets. Filaments subulate (glabrous): anthers awnless; the cells 

 tapering into a tubular beak, which opens by a pore at the apex. Capsule depressed- 

 globose : pericarp in dehiscence separating into two layers ; the chartaceous epicarp locu- 

 licidally 5-valved ; endocarp cartilaginous, at length 10-valved ; sutures not thickened ; 

 placentse on the summit of the short columella. Seeds imbricated in 2 rows, compressed 

 and obtusely angled ; the smooth and shining coat much thickened on the side next the 

 placenta. 



= = Corolla open-campanulate, 4-5-lobed or parted : anthers short, fixed nearly by their 

 apex : fruticulose and heath-like, with small thick or acerose mostly imbricated leaves. 



12. CASSIOPE. Calyx ebracteolate, of ovate imbricated sepals. Anther-cells each open- 

 ing by a large terminal jjore, and tipped by a slender recurved awn. Capsule globose or 

 ovoid, 4-5-valved ; the valves 2-cleft. Seed-coat thin and close. 



Tribe III. ERICE.E. Fruit a locnlicidal or sometimes septicidal 4-5-celled capsule. 

 Corolla gamopetalous, marcescent-persistent; the lobes convolute in the bud. Sta- 

 mens twice the number of the corolla-lobes (8, rarely 10). Heath-like leaves com- 

 monly opposite or verticillate. 



13. CALLUNA. Corolla campanulate, 4-parted, shorter and less conspicuous than the 

 4 concave colored se])als, both scarious and persistent. Anthers with a pair of auriculate 

 appendages on the back ; the cells opening by a long chink. Ovary 8-angled : ovules 

 numerous, pendulous : style filiform. Capsule globose-4-angular, septicidally 4-valved. 



Tribe IV. RIIODODEXDRE^E. Fruit a .septicidal capsule ; the valves (except in 

 Leiophi/llum, &c.) in dehiscence separating from the persistent placentiferous colu- 

 mella. Corolla deciduous, its lobes or petals chiefly imbricated in the bud. Anthers 

 destitute of awns or appendages. Stigma not rarely surrounded by a ring or 

 border. (Rhodorecc Don, name changed by Maximowicz, because llhodora falls 

 into Rhododendron.) 



* Anthers opening by a pore or chink at the apex of each cell. 

 ■i— Corolla gamopetalous: scaly leaf-buds none: flowers from the axils of coriaceo-foli- 

 aceous persistent (seldom scale-like or scarious) bracts, or rarely from those of ordinary 

 leaves : filaments and style filiform : capsule globular, 4-5-valved from above. 



14. BRYANTHUS. Corolla from campanulate to ovoid, 4-0-lobed ; the lobes simply 

 imbricated in the bud. Stamens 8 to 10, straight. Leaves heath-like, alternate but crowded. 



15. KALMIA. Corolla crateriform or saucer-shaped, with a short narrow tube, 5-lobcd, 

 10-saccate below the limb. Stamens 10 ; the short anthers lodged in the sacs of tlie 

 corolla in the bud, so that the filaments are strongly recurved when this expands. Cap- 

 sule tardily septicidal. Leaves alternate, opposite, or whorled, flat. 



•i- H— Corolla gamopetalous : buds, at least flower-buds, scal.y-strobilaceous ; the thin or 

 scarious scales caducous or deciduous: capsule 4-5-valved (or sometimes more) from 

 apex to base : seeds usually (but not always) scobiform, having the loose coat produced 

 or appcndaged at both ends : calyx often much reduced or obsolete. 



16. MENZIESIA. Flowers usually 4-merous. Corolla from globular-urceolate to cylin- 

 draceous, 4-t()othed or lobcd. Calyx bristiy-ciliatc. Stamens included, mostly 8: filaments 

 subulate : anthers mostly linear-sagittate ; the cells opening bj' an oblique pore or short 

 chink. Style included : stigma truncate. Cajjsule short. 



1 7. RHODODENDRON. Flowers almost always 5-merous. Corolla various (but not con- 

 tracted at the orifice), lobed or cleft, or even parted, often somewhat irregular. Stamens 

 sometimes as few as the corolla-lobes, more connnonly of twice the nundicr, usually de- 

 clineil: filaments filiform or slender-subulate: anthers short; the cells o])ening by a ter- 

 minal orbicular pore. Style filiform : stigma cajjitate or somewhat lobed. 



•1— -I— H— Corolla polypctalous or very nearly so : filaments filiform : seeds scobiform or 

 linear : placenta borne on the summit of the persistent columella. 



18. LEDUM. Calyx 5-lobed or parted, small. Petals oval or obovate, widely spreading. 

 Stamens 5 to 10. Capsule oval or oblong, 5-celled, 5-valved from the base upward ; the 

 columella slender. Flowers umbellate or corymbose from sel^a^ate strobilaceous buds. 



