EKIGACEAE (HEATH FAMILY) 62J 



Peat-bogs and cold mossy woods, s. to N. S., n. and w. N. E., mts. of Pa., Mich., 

 etc. (Asia.) 



* * Style strongly declined, the apex curved upward, longer than the conniven\ 

 or spreading petals; stigma much narrower than the truncate excavatec 

 ring-like apex of the style ; anthers contracted below the openings, formins, 

 a short neck; leaves denticulate or entire. 



■I- Petals white or greenish-white. 



3. P. chlordntha Sw. Leaves small (rarely 3 or 4 cm. long), roundish, thick 

 dull, shorter than the petiole, or even wanting ; scape few-flowered, naked oi 

 with a single small bract, 0.5-3 dm. high ; calyxrlobes roundish-ovate, very short . 

 the elliptical obtuse petals converging, greenish-white ; anther-cells contractec 

 into a distinct neck ; style little exserted. — Open woods, Lab. to B. C, s. to I). C 

 111., Mich., Wise, etc. June, July. (Eu.) 



P. OXYPETALA Aust., descrlbcd in 1867 from a wooded hill near Deposit, 

 Delaware Co., N. Y., has not since been collected. It was probably an anomar 

 lous development of no. 3, in which the leaves and petals were acute or even 

 subacurainate. 



4. P. elliptica Nutt. (Shin Leap.) Leaves thin and dull, elliptical or obo- 

 vate-oval, longer than the margined petiole; raceme many-flowered ; calyx-lobei 

 ovate, acute, not one fourth the length of the obovate rather spreading whitisl: 

 petals; anther-cells blunt. — Dry woods and thickets, e. Que. to B. C, s. tc 

 D. C, 111., Mich., Wise, la., etc. June, July. 



5. P. americana Sweet. Leaves orbicular to broadly elliptic, thick, shining 

 usually as short a."! the petiole; scape braoted, 1-3.5 dm. high; raceme elon- 

 gated, many-flowered ; calyx-lobes lanceolate or oblong-lanceolate, acutish, will 

 somewhat spreading tips, one half or one third the length of the roundish- 

 dbovate rather spreading thick white petals ; corolla 1.5-2 cm. broad; anther- 

 ceUs mucronate. (P. rotimdifolia Man. ed. 6, not L.) — Open or sandy woods. 

 P. E. I. and N. S. to S. Dak. and Ga. June-Aug. 



■I- -I- Petals pink or rose-purple. 



6. P. asarifblia Michx. Leaves transversely broad-elliptic or round-reniform, 

 cordate, coriaceous, glossy; scapes 1-3 dm. high, bracted ; raceme loose, elon- 

 gated, the flowers 1-1.5 cm. broad; calyx-lobes ovate or ovate-triangular. 

 (P. rotundifolia, var. Hook.) — Alluvial woods and swamps, e. Que. to Yukon, 

 s. to N. S., n. N. E., n. N. Y., n. Mich., and Col. June-Aug. (Asia.) Passing tc 



Var. incarnata (Fisoh.) Pernald. Leaves obovate to suborbicular, rounded 

 at base, rather dull; scapes 1-5 dm. high. (P. uliginosa Torr.) — Bogs and 

 mossy woods, Nfd. to Alaska, s. to n. N. E., centr. N. Y., Mich., Wise, Col., and 

 Cal. (Asia.) 



5. M0N6TR0PA L. Indian Pipe. Pinesap 



Calyx of 2-5 lanceolate bract-like scales, deciduous. Corolla of erect spatu- 

 late or wedge-shaped scale-like petals, which are gibbous or saccate at the base, 

 and tardily deciduous. Stamens 8 or 10 ; filaments awl-shaped ; anthers becom- 

 ing 1-celled. Style columnar ; stigma disk-like, 4-5-rayed. Capsule ovoid, 

 8-10-grooved, 4-5-celled, loculicidal; the very thick placentae covered with 

 innumerable minute seeds, which have a very loose coat. — Low and fleshy 

 herbs, tawny, reddish, or white, parasitic on roots, or growing on decomposing 

 vegetable matter ; the clustered stems springing fron a ball of matted fibrous 

 rootlets, furnished witli scales or bracts in place of leaves, 1-several-flowered ; 

 the summit at first nodding, in fruit erect. (Name composed of ixbvos, one, and 

 TpiSTTos, turn, the summit of the stem being turned to one side.) 



§ 1. EUM0N6TR0PA Gray. Plant inodorous, 1-flowered; calyx o/2-4 irreg- 

 ular scales or bracts; anthers transverse, opening equally by 2 chinks; 

 style short and thick. 



1. M. uniflbra L. (Indian Pipe, Cobpse Plant.) Smooth, waxy-white, 

 ■ flesh-color, or rarely deep red, turning blackish in drying, 0.5-3 dm. high ; 



