212 HEATH FAMILY, 



11. ANDROMEDA. Calyx Ta]vate in the early bud ; no braotlets. Corolla various. 



Pod globular, or short-ovate, 5-valved, locuUeidal. Shi-ubs. 



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



Anthers awnless. Pod conioal or pyramidal, 5-valved, looulicidal. Tree. 



c. Corolla (usually large) open-bell-shaped, saucer-shaped, funnel-farm, (fc, 5-lobed 

 or cleft : anthers short, without awns or other appendages, opening, ojtly: by 

 holes at the top : filaments long and slender, as is also the style ; pad syilkidati, 

 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 uwhtl-Uhe clusters from large scaly terminal buds, (heir thin scnle- 



like bracts or bud-scales falling as the blossoms arc developed. Calyx often 



minute or obsolete. 



14. RHODODENDRON. 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. 



* * Polypetalous or nearly so: the (white) corolla of 5 equal petals, 



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



17. LEIOPHYLLUM. Stamens 10 : anthers opening lengthwise. Pod2-3-celIed. 



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



18. LEDUM. Stamens 6-10: anthers opening by holes at top. Pod S-oelled. 



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

 terminal buds, as in Azalea, 

 ■t- ■»- Petals less spreading ; leaves deciduous : flowers in hoary rficemes. 



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-colled, enclosed in the 

 calyx. Leaves alternate, serrate, feathei^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 holesiby which they 

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



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



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

 o, iMnNT?=?4^" S'y'® ^""S- 'V^'^l'^'es of pod cobwebbv on the edges. 



21. MONLbliS. Flower sblitary, with orbicular wideiv spreading (sometimes only 



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

 nnKn Snif ""^ "' '" '^® "®^' genus: otherwise like Pyrola. 



22. tHlMAl HILA. Flowers several in a corymb or umbel, with orbicular widely- 



spreadmg petals, 2-horned 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 edges. Stems leafy belmv: 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: anthers kidney-shaped, opening across the top, 

 style stout : stigma depressed. Pod 4 - 5-celled, seeds imiumerable, minnta, 

 resembling flae sawdust. 



