ERICACEAE (HEATH FAMILY) 629 



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 connivent 

 or spreading petals ; stigma much narrower than the truncate excavated 

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

 a short neck; leaves denticulate or entire. 



-t- Petals white or greenish-white. 



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

 dull, shorter than the petiole, or even wanting; scap>e few-flowered, naked or 

 with a single small bract, 0.5-3 dm. high ; calyx-lobes roundish-ovatp, very short ; 

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

 into a distinct neck ; style little exserted. — Open woods, Lab. to B. C, s. to 1). C, 

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



P. oxYPETALA Aust., described in 1867 from a wooded hill near Deposit, 

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

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

 subacurainate. 



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

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

 ovate, ac7ite, not one fourth the length of the obovate rather spreading whitish 

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

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



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

 usually as short as the petiole; scape bracted, 1-3.5 dm. high; raceme elon- 

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

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

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

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

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



•f- H- 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 to 



Var. incarnata (Fisch.) Fernald. Leaves obovate to suhorbicular, rounded 

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

 mossy woods, 

 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 flesliy 

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

 vegetable matter ; the clustered stems springing from a ball of matted flbnuis 

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

 the summit at first nodding, in fruit erect. (Name composed of /x6>'oj, one, and 

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



§ 1. EUM0N6TR0PA Gray. Plant inodorous, 1-flowered; calyx ofl-A irreg- 

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

 style short and thick. 

 1. M. unifl5ra L. (Indian Pipe, Corpse Plant.) Smooth, waxy-white, 



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



