246 ERICACEAE. (HEATH FAMILY.) 



9. CASSIOPE. Calyx imbricated. Corolla broadly campanulate, deeply 4-5-cleft. Pod 

 globular-ovoid, 4 - 6-valved, the valves Z-cleft. 



10. ANDROMEDA. Calyx valvate and very early open in the bud. Pod globular. Beeds 



mostly hanging. 



11. OXYDENDRUM. Calyx valvate and opening early in the bud. Pod oblong-pyramidal. 



Seeds all ascending. 



* * Anthers turned over outwardly hi the bud, afterwards upright ; the cells opening only 

 by a hole at the top. Corolla of 5 separate petals. 



12. QLETHRA. Sepals 5. Stamens 10. Style 3-cleft at the apex. Pod 3-valved. 



TRIBE HI. RHODOREJE. Fruit a pod opening septicidally. Corolla deciduous 



* Anther-cells opening by a pore at the top. 



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

 18. PHYLLODOCE. Corolla ovate or urn-shaped. Leaves narrow and heath-like. 

 14. KALMIA. Corolla broadly bell-shaped or wheel-shaped, with 10 pouches. Leaves broad. 



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

 16. MENZIESIA. Corolla globular-bell-shaped, 4-toothed. Stamens 8. Leaves deciduous. 



16. AZALEA. Corolla open funnel-form, 5-lobed. Stamens 6. Leaves deciduous. 



17. RHODODENDRON. Corolla bell-shaped or short funnel-form, 5-lobed. Stamens 10. 



Leaves evergreen. 



18. RHODORA. Corolla irregular, ringent, two of the petals nearly separate from the rest 



Stamens 10. Leaves deciduous. 



19. LEDUM. Corolla regular, of 6 nearly distinct petals. Leaves evergreen. 



* * Anther -cells opening lengthwise. Buds not scaly. Leaves evergreen. 



20. LOISELEURIA. Corolla deeply 5-cleft. Stamens 5, included. 



21. LEIOPHYLLUM. Corolla of 6 separate petals. Stamens 10, exserted. 



SUBORDER HI. PYROLE^. THE PYROLA FAMILY. 



Calyx free from the ovary. Corolla of 5 distinct petals. Pollen, &c. 

 as in the preceding. Seeds with a very loose and translucent cellular cov- 

 ering much larger than the nucleus. Nearly herbaceous ; with evergreen 

 foliage. 



22. PYROLA. Flowers in a raceme. Petals not spreading. Filaments awl-shaped : anthen 



scarcely 2-horned. Style long. Valves of the pod cobwebby on the edges. 



28. MONESES. Flower single. Petals widely spreading. Filaments not dilated in the mid* 

 die : anthers conspicuously 2-horned. Style straight, exserted : stigmas 6, radiate. 

 Valves of the pod smooth on the edges. 



24. CHIMAPHILA. Flowers corymbed or umbelled. Petals widely spreading. Filaments 

 dilated in the middle. Style very short and top-shaped, covered by a broad and or- 

 bicular stigma. Valves of the pod smooth on the edges. 



SUBORDER IV. MONOTROPE^. THE INDIAN-PIPE FAMILY. 



Flowers nearly as in Suborders II. or III., but the plants herbaceous and 

 entirely destitute of green foliage, and with the aspect of Beechdrops. 

 Seeds as in Suborder III. Pollen simple. 



* Corolla monopetalous : anthers 2-cellod. 



26. PTEROSPORA. Corolla ovate, 5-toothed, withering-persistent. Anthers 2-horned on the 

 back, opening lengthwise. 



26. SCHWEINITZIA. Corolla broadly bell-shaped, 5-lobed. Anthers opening at the top. 



* * Corolla of 4 or 6 separate petals : calyx imperfect or bract-like. 



27. MONOTROPA. Petals narrow. Anthers kidney-shaped, opening across th top. 



