22 
NORTH AMERICAN FLORA 
[VoLumME 29 
ally thickened towards the apex, which is dilated into a collar; stigma of 5 erect papillae. 
Fruit depressed-globose, umbilicate, 5-valved, dehiscent from the base upwards, the valves 
connected by arachnoid threads. 
Type species, Pyrola rotundifolia L. 
Petals acute at the apex. 
Petals obtuse or rounded at the apex. 
Sepals much longer than broad, at least about half longer. 
Petals pink, rose, or purple. 
Leaf-blades shorter than the petioles. 
Sepals lanceolate or deltoid-lanceolate, twice as long as broad, 
tapering from the very base; leaf-blades distinctly denticu- 
late by the excurrent veins. 
Sepals ovate-lanceolate to ovate, about one and a half times 
as long as broad, broadest just above the base; leaf- 
blades crenulate. 
Leaf-blades elliptic or obovate to suborbicular, usually 
acutish at the base. 
Leaf-blades round-reniform to suborbicular, usually sub- 
cordate at the base. 
Leaf-blades longer than the petioles. 
Petals white or greenish. 
Sepals lanceolate or lance-deltoid, acute or acuminate, entire. 
Leaf-blades decidedly tapering at the base, usually acute at the 
apex. 
Scape 2-3 dm. high; petals rounded-obovate; style scarcely 
exserted. 
Scape 1-2 dm. high; petals oval; style distinctly exserted. 
Leaf-blades rounded, subcordate or abruptly contracted at the 
base, mostly rounded at the apex (except in P. Gormanii). 
Scape 2-3 dm. high; bracts and sepals pale, the former 
shorter than the pedicels; petals not strongly veined; 
leaf-blades abruptly contracted but acute at the base. 
Scape 1-2 dm. high; bracts and sepals rose-colored, the 
former equaling the pedicels; teaf-blades mostly 
rounded or subcordate at the base. 
Leaf-blades mostly rounded at the apex, crenulate 
or subentire. 
Leaf-blades acute, mucronate-denticulate, with excur- 
rent veins. 
Sepals elliptic, usually rounded or obtuse at the apex, crenulate. 
Tubes of the anthers short and curved; filaments decidedly 
dilated below and style distinctly thickened upwards. 
Tubes of the anthers obsolete and straight; filaments and 
style filiform or nearly so. 
Sepals little if at all longer than broad: petals mostly greenish-white. 
Basal leaves several; scape with 0-3 scales below the inflorescence. 
Leaf-blades rounded at the apex, oval to orbicular; margin not 
chartaceous. 
Leaf-blades suborbicular, 1-3 cm. long, usually shorter than 
the petioles. 
Leaf-blades oval, 3-8 em. long, longer than the petioles. 
Leaf-blades usually acute at the apex; if obtuse, the blades 
spatulate; margin chartaceous. 
Leaf-blades ovate to oval, usually broadest below the middle, 
more or less mottled. 
Leaf-blades obovate, oblanceolate or spatulate, not mottled. 
Basal leaves 1 or 2, reduced and short-petioled, or none; scape with 
several scales. : 
Plant stout, many-flowered; petals broadly obovate, greenish- 
brown on the back; leaf-blades, if present, lanceolate. 
Plant slender, few-flowered; petals elliptic, obovate, greenish- 
white; leaf-blades, if present, orbicular to elliptic. 
1, Pyrola oxypetala Aust.; A. Gray, Man. ed. 5. 302. 
1. P. oxypetala, 
nyhy 
P. 
ae ae 
. bracteata, 
. uliginosa. 
. asarifolia, 
Sartorii. 
. angustifolia. 
. Septentrionalis. 
. americana, 
. borealis. 
Gormanii. 
grandifiora.. 
occidentalis, 
. chlorantha, 
. elliptica, 
picta. 
dentata. 
aphylla, 
sparsifolia. 
1867. 
Perennial with a slender rootstock; stem above ground very short; petioles 1-3 cm. long; 
leaf-blades ovate, 1-2.5 cm. long, acute at each end, subentire; scape with 1 or 2 subulate 
scales, including the inflorescence about 2 dm. high; raceme 8-10-flowered; bracts subulate, 
shorter than the pedicels, 5 mm. long; sepals deltoid, 1.5 mm. long, acute, longer than broad; 
petals white, ovate, acute, about 5 mm. long; filaments dilated below; anthers oblong, mucro- 
nate at the distal end, not inverted; tubes short, somewhat curved; style only slightly curved, 
thickened upwards. 
Type LOcALIty: Wooded hillside near Deposit, Delaware County, New York. 
DISTRIBUTION: Known only from the type locality. 
In.ustrRations: Bull. Torrey Club 20: $l. 158; Britt. & Brown, Ill. Fl. f. 2731; ed. 2. f. 3202. 
