24 NORTH AMERICAN FLORA LVoLUME 29 
5. Pyrola Sartorii (Alef.) Hemsl. Biol. ‘Centr. Am. Bot. 2:283. 1881. 
Thelaia Sartorii Alef. Linnaea 28: 50. 1856. 
Perennial, with a long creeping rootstock; stem above ground very short; petioles 1-3 
em. long; leaf-blades ovate-lanceolate, acute at each end, nearly entire, the tips of the 
veins forming minute callosities, thick, 2-5 cm. long, 1.5-3.5 em. wide; scape with 2-4 scales, 
including the inflorescence 1-3 cm. long; flowers 4-10; bracts linear-lanceolate, longer than 
the pedicels; pedicels about 4 mm. long; sepals lanceolate or ovate-lanceolate, 3-4 mm. long, 
2mm. wide; petals rose-colored, obovate-elliptic; filaments dilated below; anthers 2 mm. long, 
scarcely mucronate at the distal end; style somewhat thickened above, scarcely longer than 
the petals. 
TYPE LOCALITY: Mount Orizaba, Vera Cruz. 
DISTRIBUTION: Mount Orizaba. 
ILLUSTRATION: Linnaea 28: pl. 1, f. 6. 
6. Pyrola angustifolia (Alef.) Hemsl. Biol. Centr. Am. 
i Bot. 2: 283. 1881. 
Thelaia angustifolia Alef. Linnaea 28: 52. 1856. 
Pyrola Liebmanii Lange, Vidensk. Meddel. 1867: 113. 1868. 
Perennial, with a slender rootstock; stem above ground 1-3 cm. long; petioles 1-6 cm. 
long; leaf-blades elliptic or oval, 2-7 cm. long, 1-4 cm. wide, acute or obtuse at the apex, 
acute and decurrent at the base, coriaceous, minutely and remotely crenulate, with slightly 
excurrent veins, dark-green above, often brownish beneath; scape with 2-4 scales, including 
the inflorescence 2-3 dm. high; raceme 8—15-flowered; bracts lanceolate, long-acuminate, 
longer than the pedicels; sepals lanceolate, acuminate, 5 mm. long, 1.5 mm. wide; petals 7-8 
mm. long, rounded, obovate, greenish- or brownish-white; filaments dilated at the base; 
anthers mucronate at the proximal end; tubes strongly curved; pores elliptic. 
TyPR LOCALITY: Mount Orizaba, Vera Cruz. 
DIstRIBUTION: Vera Cruz, Puebla, and Oaxaca. 
ILLUSTRATION: Linnaea 28: pl. 1, f. 7; Vidensk. Meddel. 1867: pl. 1. 
7. Pyrola americana Sweet, Hort. Brit. ed. 2. 341. 1830. 
Pyrola rotundifolia Michx. Fl. Bor. Am. 1: 251. 1803. Not P. rotundifolia L. 1753. 
Pyrola obovata Bertol. Novi Comm. Acad. Bonon. 6: 427. 1844. 
Thelaia asarifolia Alef. Linnaea 28: 54,in part. 1856. Not Pyrola asarifolia Michx. 1803. 
Perennial, with a slender rootstock; stem above ground 1~3 em. long; petioles 3-10 cm. 
long; leaf-blades suborbicular, obovate, or oval, tapering at the base, rounded or retuse at the 
apex, 2.5-8 cm. long, 2.5-7 cm. wide, entire or crenulate, thick, dark-green above, paler or 
reddish beneath; scape with 1-3 scales, including the inflorescence 2-3 dm. high; bracts 
lanceolate, 7-8 mm. long, shorter than the pedicels; sepals lanceolate, 3-3.5 mm. long, 
about twice as long as broad, acute; petals whitish, rounded-obovate, about 7 mm. long; 
filaments dilated below; anthers nearly 3 mm. long, cuspidate at the distal end; tubes short, 
curved; fruit depressed-globose, 6~7 mm. broad. 
TYPE Locality: Canada. 
DISTRIBUTION: Woods, from Nova Scotia to North Carolina, ae and Wisconsin. 
I1s,UsTRATIONS: Novi Comm. Acad. Bonon. 6: pl. 19; Linnaea ae ge 3 f.8 (as Thelaia asari- 
folic); Britt. & Brown, Ill. Fl. f. 2726 (as P. rotundifolia); ed. 2. f. 3 
8. Pyrola borealis Rydberg, sp. nov. 
Perennial, with a scaly rootstock; stem above ground 1-2 cm. long; petioles 3-6 cm. long; 
leaf-blades suborbicular or round-reniform, or rarely oval, subcordate or rounded at the 
base, rounded or even acutish at the apex, 2.5-4 cm. long and broad, scarcely crenulate, 
green and rather dull on both sides, or reddish beneath; scape with 1-3 scales, including the 
inflorescence 1-2 dm. high; bracts lanceolate or ovate-lanceolate, 6-8 mm. long; pedicels 4-5 
mm. long; sepals pinkish, lanceolate, 4-5 mm. long, acute; petals whitish, rather strongly 
veined, suborbicular, 7 mm. long, somewhat clawed; filaments slightly dilated below; anthers 
