310 ERICACEAE. (HEATH FAMILY.) 



Tribe II. ANDROMEDE^E. Fruit a loculicidal capsule (berry-like in n. 6). Corolla 

 deciduous. 



* Anther-cells opening through their whole length, not appendaged. 



5. Epigyea. Corolla salver-shaped. Calyx of 5 separate dry and pointed sepals. 



* * Anther-cells opening only at the top. Corolla not salver-shaped, 

 i- Calyx becoming enlarged and berry-like in fruit. 



6. Gaultheria. Calyx 5-cleft, in fruit enclosing the capsule. Anthers 4-awned at top. 



- - Calyx dry, not becoming fleshy after flowering. 

 ** Corolla urceolate to cylindrical, 5-toothed ; not heath-like. 



7. Andromeda. Calyx valvate and very early open, naked. Capsule globular. Seeds 



mostly hanging on the central placenta. 



8. Oxydendrum. Calyx short, early open, naked. Capsule oblong-pyramidal. Seeds 



all ascending. A small tree. 



9. Leucotlioe. Calyx slightly or much imbricated, naked or bibracteate. Corolla cylin- 



draceous. Capsule depressed, 5-lobed, the valves entire. 



10. Cassandra. Calyx of rigid imbricated ovate sepals, bibracteate. Corolla cylindraceous. 



Capsule splitting when ripe into an outer and inner layer, the inner of 10 valves. 

 *+ ** Corolla campanulate, 4 - 5-lobed or -parted ; heath-like, with acerose imbricated leaves. 



11. Cassiope. Calyx of ovate imbricated sepals. Capsule globular-ovoid, 4 - 5-valved, the 



valves 2-cleft. 



Tribe III. ERICE^E. Corolla persistent, becoming scarious. Capsule septioidal. 

 12 Call mm. Corolla bell-shaped, 4-parted. Leaves minute, opposite, imbricate. 

 Tribe IV. RHODODENDRE^E. Fruit a septicidal capsule. Corolla deciduous. 



* Anther-cells opening by a hole or chink at the top. 

 4- Flowers not from scaly buds ; the bracts leaf-like or coriaceous. 



13. Bryanthus. Corolla ovate or urn-shaped. Leaves narrow and heath-like. 



14. Kalmia. Corolla broadly bell-shaped or wheel-shaped, with 10 pouches receiving as 



many anthers. Leaves oblong or linear. 



*- - Flowers developed from large scaly buds, the scales or bracts caducous. 



15. Menziesia. Corolla globular-bell-shaped, 4-toothed. Stamens 8. Leaves deciduous. 



16. Rhododendron. Flowers usually 5-merous. Corolla bell-shaped or funnel-form. 



lobed or parted, often somewhat irregular. Leaves deciduous or evergreen. 



17. Ledum. Corolla regular, all 5 petals nearly separate. Stamens 5 -10. Leaves evergreen. 



* * Anther-cells opening lengthwise. Leaves evergreen. Bud-scales firm and persistent. 



18. Leiophyllum. Corolla of 5 separate petals. Stamens 10, exserted. 



19. Loiseleuria. Corolla deeply 5-cleft. Stamens 5, included. 



SUBORDER III. Pyrolese. (PYROLA FAMILY.) Calyx free from 

 the ovary. Corolla poly pet alous. Anthers extrorse in the bud, opening 

 by pores at the base (inverted in the flower). Seeds with a loose and 

 translucent cellular coat much larger than the nucleus. 



Tribe I. CLETHREJE. Shrubs or trees, with deciduous foliage (in ours). Pollen- 

 grains simple. Capsule 3-celled. 



20. Clethra. Sepals and petals 5. Stamens 10. Style 3-cleft at the apex. 



Tribe II. PYROI.E^E. Herbs or nearly so, with evergreen foliage. Pollen-grains 

 compound. Capsule 5- (rarely 4-) celled. 



21. Chimaphila. Stems leafy. Flowers corymbed or umbelled. Petals widely spreading. 



Style very short and top-shaped. Valves of the capsule smooth on the edges. 



22. Moneses. Scape 1 -flowered. Petals widely spreading. Style straight, exserted ; stigma 



5-rayed. Valves of the capsule smooth on the edges. 



