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rolla regular, with 4-5 petals; stamens as many or twice as many; ovary 3-10-celled, with 1 style. 1a. Plants without green color; leafless or with scale leaves only --2. 1b. Plants with green leaves --4. 2a. Flowers solitary (1-2 dm. high; summer) =Indian Pipe, Monotropa uniflora.= 2b. Flowers in clusters --3. 3a. Petals united into a bell-shape corolla (3-9 dm. high; summer) =Pine Drops, Pterospora andromedea.= 3b. Petals all separate (1-3 dm. high; summer) =Beech Drops, Monotropa hypopitys.= 4a. Leaves all basal; herbaceous plants with terminal racemes (1-4 dm. high; summer) (Shin-leaf) --5. 4b. Stem-leaves present --12. 5a. Style straight --6. 5b. Style bent near the apex --8. 6a. Racemes one-sided, the flowers all turned in one direction (flowers white or greenish-white) --7. 6b. Raceme regular, the flowers not all pointing in the same direction (flowers white or pink) =Shin-leaf, Pyrola minor.= 7a. Flowers numerous in each raceme =Shin-leaf, Pyrola secunda.= 7b. Flowers only 3-7 in each raceme =Shin-leaf, Pyrola seconda var. obtusata.= 8a. Flowers pink or purple --9. 8b. Flowers white or greenish --10. 9a. Leaves cordate at base =Shin-leaf, Pyrola asarifolia.= 9b. Leaves rounded at base, not cordate =Shin-leaf, Pyrola asarifolia var. incarnata.= 10a. Leaves shining on the upper side; sepals one-third as long as the petals =Shin-leaf, Pyrola americana.= 10b. Leaves dull on the upper side; sepals one-fourth as long as the petals, or a little shorter --11. 11a. Leaf-blades mostly shorter than their petioles, thick and firm =Shin-leaf, Pyrola chlorantha.= 11b. Leaf-blades thin, usually longer than their petioles =Shin-leaf, Pyrola elliptica.= 12a. Petals nearly or quite separate from each other --13. 12b. Petals united into a gamopetalous corolla, the tube of which is as long as or longer than the lobes --18. 13a. Leaves opposite or whorled; stems herbaceous or nearly so (summer) --14. 13b. Leaves alternate; stems shrubby (early summer) --16.
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