292 Monotropaceae 
Calyx 5-parted, persistent. Petals 5, deciduous. Ovary 5-celled; style straight or 
curved ; stigma 5-lobed. Capsule subglobose, 5-lobed, 5-valved from the base. (Dimin- 
utive of L. pyrus=the pear-tree; from the similarity of the leaves. ) 
A. Green leaves none or very rudimentary. 
B. Flowers red. W.C.E. (P. aphylla paucifolia. ) 
P, aphylla Sm. (False Coral-root) 
BB. Flowers white. (See EE.) 
AA. Green leaves plainly present. 
C Style curved downwards. 
D. Flowers white or greenish. 
E. Calyx-lobes obtuse; flowers greenish; leaves orbicular or nearly so. W. C. 
E. P. chlorantha Swartz (Green Wintergreen) 
EE. Calyx-lobes acute; flowers white; leaves broadly ovate to spatulate-ob- 
long. W.C.E. (P. picta integra; P. picta dentata.) 
P. picta Sm. (Variable Wintergreen) 
DD. Flowers red or pink. 
F. Leaves thin, dull, obtuse. W. C. E. (P. elliptica for our region; P. ro- 
tundifolia incarnata.) P. incarnata Fisch. (Round-leaved Wintergreen) 
FF. Leaves coriaceous, shining, acute. W. C. E. 
P, bracteata Hook. (Pear-leaved Wintergreen) 
CC. Style straight. 
G._ Leaves ovate; raceme I-sided; style equaling or exceeding the petals. W. C. 
P. secunda L. (1-sided Wintergreen) 
GG. Leaves orbicular; raceme not I-sided: style shorter than the petals. W. C. 
Fiz P. minor L. (Small Wintergreen) 
MONOTROPACEAE Indian Pipe Family 
Herbs, leafless, fleshy, white to red or brown, without green. Flowers either ter- 
minal and solitary, or else in a terminal spicate or racemose or head-like cluster. Flow- 
ers regular, perfect. Sepals 2—6, distinct or united, erect. Petals 3—6, rarely none, 
distinct or united, imbricated. Stamens 6—12, hypogynous; filaments equal, distinct or 
united at base; anthers opening by slits (except Sarcodes). Ovary superior, 4—6-lobed, 
1—6-celled; placentae projecting from a central columella or parietal and 2-winged. 
Stigma capitate to funnelform. Fruit a capsule, loculicidal, 2—6-valved. Seeds many, 
minute. 
A. Corolla none; flowers spicate. ALLOTROPA (p, 293) 
AA. Corolla of distinct petals; flowers solitary or racemose. 
B. Ovary 3—5-celled; disk 10—12-toothed. 
C. Stems |-flowered; plant pure white; bracts entire. Monotropa (p. 293) 
CC. Stems 3—20-flowered; plant yellowish or reddish; bracts erose to fimbriate. 
Hypopitys (p. 293) 
BB. Ovary |-celled; disk inconspicuous or none; bracts laciniate-toothed or fimbriate. 
PLEURICOSPORA (p. 294) 
AAA. Corolla of united petals; flowers racemose or spicate or capitate. 
D. Flowers in a raceme or spike; sepals 5; ovary 5-celled, none of these cen- 
trally placed. 
F. Plant 3—9 dm. high; flowers rather distant, in a long and not densely scaly 
raceme; corolla globose-ovate; corolla-lobes recurved; anthers 2-awned on the 
back. PTEROSPORA (p. 293) 
