212 HEATH FAMILY. 



11. ANDROMEDA. Calyx valvate in the early bud : no bractlets. Corolla various. 



Pod globular or short-ovate, 5-valved, loculicidal. Shrubs. 



12. OXYDENDRUM. Calyx valvate in the bud; no bractlets. Corolla ovate. 



Anthers awnless. Pod conical or pyramidal, 5-valved, loculicidal. Tree. 



C. Corolla (usually large) open-bell-shnped, saucer-shnped, funnel-form, (fr., b-lobed 

 or cleft : (tuthers short, without awns or other oppeiulayts, (ipeitintj oidy by 

 holes lit die top : Jilamenti lony and slender, as is also the style : pud sepluulal ; 

 leaves entire. 



= No scaly buds : bracts green, firm, and persistent. 



13. KALMIA. Corolla broadly open, slightly 5-lobed, and with 10 pouches in 



which the 10 anthers are lodged until extricated by insects, when the bent 

 elastic filaments fly up and discharge the pollen. Pod globular. Leaves 

 evergreen. Flowers in umbels or corymb-like clusters. 

 = = Flowers in umbel-like clusters from larye scnly terminal buds, their thin scale- 

 like bracts or bud-scales faUiiig as the blossoms are developed. Calyx often 

 minute or obsolete. 



14. RHODODENDBON. Corolla bell-shaped, funnel-form, or various. Stamens 



10, often curved to the lower side. Leaves evergreen, or rarely deciduous. 

 Pod mostly oblong. 



15. AZALEA. "Stamens 5, or rarely more, and leaves deciduous: otherwise nearly 



as in Rhododendron. And the characters run together, so that Azaleas would 

 hardly be kept distinct, except that they are so familiar in cultivation. 



16. RHODORA. Like Azalea, but the corolla strongly irregular, the upper part 



3-lobed, the lower of 2 almost or quite separate petals ; and stamens 10. 



* * Polypelalous or nearly so : the {white) corolla of 5 equal petals, 

 •«- Widely spreading, oval or obovate : leaves evergreen : flowers in a terminal umbel. 



17. LEIOFHYLLUM. Stamens 10: anthers opening lengthwise. Pod 2 - 3-celled. 



Leaves small, smooth both sides, glossy, mostly opposite. 



18. LEDUM. Stamens 5-10: anthers opening by holes at top. Pod 5-celled. 



Leaves alternate, thinnish, rusty-woolly underneath. Flowers from scaly 

 terminal buds, as in Azalea. 

 +- -1- Petals less spreading : leaves deciduous : flowers in hoary racemes. 



19. CLETHRA. Sepals and obovate-oblong petals 5. Stamens 10: anthers arrow- 



shaped and reflexed in the bud, the hole at the top of each cell then at the 

 bottom. Style 3-cleft at the apex. Pod 3-valved, 3-celled, enclosed in tlio 

 calyx. Leaves alternate, serrate, feather-veined, deciduous. 



III. PYROLA FAMILY ; evergreen herbs or nearly so, with 

 calyx free from the ovary, corolla of separate petals, anthers turned 

 outwards in the bud, soon inverted, when the holes by which they 

 open are at top. Seeds innumerable, with a loose cellular coat. 



20. PYROLA. Flowers in a raceme on a scape which be.irs rounded leaves at 



base. Petals roundish, more or less concave. Stamens 10, with awl-shaped 

 filaments. Style long. Valves of pod cobwebby on the edges. 



21. MONESES. Flower solitary, with orbicular widely spreading (sometimes only 



4) petals, conspicuously 2-horned anthers, large 5-rayed stigma on a straight 

 stvle. and pod as in the next genus: otherwise like Pyrola. 



22. CHIM APHIL A. Flowers several in a corymb or umbel, with orbicular widely- 



spreading petals, 2-honied anthers on 'filaments enlarged and hairy in the 

 middle. Very short top-shaped style covered by a broad orbicular stigma, 

 and valves of pod smooth on the eclges. Stems leafy below : leaves narrow, 

 smooth and glossy. 



IV. INDIAN PIPE FAMILY ; herbs destitute of green foli- 

 age, parasitic on roots of other plants ; commonly represented by 

 one common genus, viz. 



23. MONOTROPA. Calyx or 2 or more deciduous bract-like scales. Corolla of 



4 or 6 erect spatulate or wedge-shaped petals, resembling the scales of the 

 stem. Stamens 8 or 10: antlicrs kidney-shaped, opening across the top, 

 stylo stout: stigma depressed. Pod 4 - 5-celled, seeds imiumerable, minute, 

 resembling fine sawdust. 



