324 ERiCACE^. (heath family.) 



nearly globose corolla : sti/le short and included. — Cold woods, Lab., White 

 Mts., L. Superior, and northward. 



2. P. seciinda, L. Subcaulescent, 3-6' high; leaves ovate, thin, longer 

 than the petiole, scattered, finelij serrate ; racemes dense and spike-like, the 

 numerous small (greenish-white) flowers all turned to one side, scarcely nod- 

 ding; calyx-lobes ovate, very much shorter than the oblong-oval petals; style 

 long, exserted. — Rich woods, Lab. to Minn., south to Md., and far northward. 

 July. (Eu.) 



Var. pumila, Gray, is a smaller form, with rounded leaves 6" or little 

 more in diameter, and 3-8-flowered scape. — High peat-bogs, N. Y. to L. Su- 

 perior, and northward. July, Aug. 



* * .b7(//e 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. 



-*- Petals and leaves acute, the latter ovate, coriaceous. 



3. P. OXypetala, C. F. Austin. Leaves ovate, small (8-12" long), 

 shorter than the slender petiole; scape (7-8' high) several-flowered; flowers 

 on ascending pedicels, not nodding ; calyx-lobes triangular-ovate, acute, short ; 

 petals lanceolate-oblong, acuminate, greenish ; anthers conspicuously mucro- 

 nate at the apex, obtusely 2-horned at base, not inverted ; style straightish, 

 scarcely exserted. — Wooded hill near Deposit, Delaware Co., N. Y. (C. F. 

 Austin, in 1860). Not since found; probably monstrous. 



•*-■ •(- Petals and leaves orbicular to oblong, very obtuse. 



4. P. chlorantha, Swartz. Leaves small (1' long), roundish, thick, duV, 

 shorter than the petiole; scape few flowered, naked (5-8' high); calyx-lobes 

 roundish-ovate, very short ; the elliptical petals converging (greenish-white) ; 

 anther-cells contracted into a distinct neck ; style little exserted. — Open woods, 

 Lab. to Perm., Minn., north and westward. June, July. 



5. P. elliptica, Nutt. (Shin-leaf.) Leaves thin and dull, elliptical or 

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

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

 (greenish-white) petals; anther-cells blunt. — Rich woods, N. Eng. to Md., 

 Iowa, Aiinn., and northward. June. 



6. P. rotundifolia, L. Leaves orbicular, thick, shining, usually shorter 

 than the petiole; scape many-bracted (6-12' high) , raceme elongated, many- 

 flowered ; cali/x-lobes lanceolate or oblong4anceolat€, acutish, with somewhat 

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

 spreading (chiefly white) petals : anther-cells nearly blunt. ^- Damp or sandy 

 Avoods, throughout tlie continent, south to N. Ga. Exhibits many varieties, 

 such as : Var. incarnA.ta, DC, with flesh-colored to rose-purple flowers, and 

 triangular-lanceolate calyx-lobes. Cold woods and bogs, N. Eng. to Minn., 

 and northward. — Var. asarif6lia. Hook., with oblate or round-reniform 

 leaves, and shorter ovate calyx-lobes; petals flesh- or rose-colored (rarely 

 white). With same range. — Var. dligin6sa, Gray, with short broadly 

 ovate calyx-lobes, subcordate to obovate dull leaves, and rose-colored or pur- 

 ple flowers Same range. (Eu.) 



