PYROLACEAE. 187 



273. PYROLA. 



Low and smooth perennial herbs; leaves roundish, petioled, 

 evergreen, basal or nearly so; flowers nodding, in a simple raceme, 

 on a more or less scaly-bracted scape; corolla of 5 concave more 

 or less converging petals; stamens 10; ovary 4- or 5-celled; ovules 

 very numerous; fruit a flattened globose 5-lobed 5-celled capsule. 



Style straight. 



Leaves orbicular; style very short. P. minor. 



Leaves ovate; style long. P. secunda. 



Style curved downward. 



Green leaves none or very rudimentary. P. aphylla. 



Green leaves present. 



Calyx-lobes obtuse, very short; flowers greenish. P. chlorantha. 



Calyx-lobes acute. 



Flowers white or whitish. P. picta. 



Flowers red or pink. 



Leaves coriaceous, shiny, acute. P. bracteala. 



Leaves thin, dull, obtuse. P. elata. 



Pyrola minor L. Leaves all basal, orbicular, obscurely crenulate, 2-4 cm. 

 long, the margined petioles nearly as long; scapes erect, 5-20 cm. high; pedicels 

 recurved; flowers white or pinkish, rather crowded; petals orbicular, naked at 

 the base; anthers obtuse; stigma large, obscurely 5-lobed. Base of Mt. 

 Carlton, Kreager. 



Pyrola secunda L. Rootstocks slender, usually much branched; stems 

 erect or ascending; leaves somewhat clustered at the base, ovate, obtuse or 

 acute, crenate, 1-3 cm. long, on slender petioles 1 cm. long; scapes 10-25 cm. 

 high, with few scale-like bracts, which also occur between the leaves; raceme 

 one-sided, 3-8 cm. long; flowers white, on short pedicels, soon nodding; corolla 

 regular; petals oblong, 4 mm. long, each with a pair of tubercles at base; 

 anthers obtuse; stigmas large, 5-lobed. Deep woods, in the mountains. 



Pyrola aphylla Smith. Very similar to P. bracteata, but the green leaves 

 reduced to scales. In coniferous woods. 



Pyrola chlorantha Sw. Leaves orbicular, often retuse, thick, not shiny, 

 small, mostly 2-3 cm. long, shorter than the petiole; scapes 10-20 cm. high, 

 bractless or with solitary bracts; raceme 3-10-flowered; petals greenish-white, 

 rounded; calyx-lobes very short and obtuse; anthers beaked. In deep conif- 

 erous woods. 



Pyrola picta Smith. Rootstocks creeping; leaves tufted at base, oblong, 

 ovate or orbicular, obtuse or acute, mucronate, obscurely denticulate or entire, 

 green, variegated with white along the veins, often purple beneath, 2-6 cm. 

 long; petioles margined, 1-3 cm. long; scapes erect, 15-30 cm. high, with few 

 bracts, 10-20-flowered; calyx-lobes short, ovate, about one-fourth as long as 

 the petals; corolla irregular; petals white, 6-7 mm. long; anthers constricted 

 at the apex; style deflexed, with a projecting collar at the base of the stigma. 

 Coniferous woods, in the mountains. 



Pyrola bracteata Hook. Leaves all basal, green, coriaceous, ovate, acute, 

 rounded at base, crenulate, 3-6 cm. long; petioles margined, as long as the 

 blades; scapes 20-40 cm. high, with several brownish scarious lanceolate 

 bracts; racemes many-flowered; calyx-lobes triangular-lanceolate, acute, about 

 half as long as the petals; corolla irregular, dull-red, about 1 cm. broad; anthers 

 slightly constricted at apex; style declined, with a collar-like ring at the base of 

 the stigma. Deep woods, in the mountains. 



