WINTERGREEN FAMILY 637 



Petals 5, concave, sessile. Stamens 10; filarnents declined; anthers contracted 

 under the terminal pores. Ovary 5-celled; hypogynous disk none; style long, 

 declined and curved upwards towards the end, which is enlarged, truncate and 

 concave and forming a ring or collar; stigma much narrower, 5-lobed. Capsule 

 5-celled, 5-lobed, loculicidally 5-valved; valves opening from the base and cob- 

 webby on the margins. 



Leaves ample, not scale-like. 

 Leaves not mottled. 



Leaves not spatnlate, dark green. 

 Petals pink or pui-plisli. 



Leaf-blades crenulate, not callous-denticulate, obtuse. 



Leaf-blades round-reniform to orbicular. 1. P. asarifolia. 



Leaf-blades orbicular to round-ovate. 2. P. uliginosa. 



Leaf-blades more or less distinctly callous-denticulate by the protruding 

 ends of the veins, rounded-ovate, acute. 3. P. bracteala. 



Petals white or greenish. 



Leaf-blades oval, longer than the petioles. 4. P. elliplica. 



Leaf-blades orbicular, usually shorter than the petioles. 5. P. chlorantha. 

 Leaves spatulate, pale or yellowish green. 6. P. dentala. 



Leaves mottled. 7. P. picta. 



Leaves reduced to lanceolate scales. 8. P. aphylla. 



1. P. asarifolia Michx. Leaf-blades reniform to orbicular, usually broader 

 than long, shining, finely crenulate, 2.5-6 cm. wide; scape 1-3 dm. high; bracts 

 lanceolate; sepals lanceolate, acute or acuminate, about 2 mm. long; petals oval, 

 pink or purplish, 5-6 mm. long. \Yet woods and swamps: N.B. — N.Y. — Minn. 

 — N.M.— B.C. Suhmont.—Mont. Je-Jl. 



2. P. uliginosa Torr. Leaf-blades broadly oval to orbicular, usually longer 

 than broad, shining, finely crenulate, 2-6 cm. broad, 2.5-8 cm. long; scape 1-3 

 dm. high; bracts lanceolate, usually purphsh; sepals ovate or triangular-lanceo- 

 late, acute or short-acuminate, about 2 mm. long; petals oval or obovate, pink 

 or purphsh, 5-7 mm. long. P. rotundifolia incarnata A. Gray, scarcely DC. 

 Wet woods and bogs: N.S.—N.Y.— Minn.— Colo.— Cahf.— B.C. Submont.— 

 Subalp. Je-Jl. 



3. P. bracteata Hook. Leaf-blades ovate, acute, shining, 2.5-6 cm. wide, 

 3-8 cm. long; scape 2-4 dm. high; bracts lanceolate, aciuninate, the lower at 

 least much exceeding the petioles; sepals lanceolate, acuminate, 3 mm. long or 

 more; petals pink or purplish, oval or obovate, 7-9 mm. long. In wet woods: 

 Alaska — Ore. — B.C. — Yukon. Submont. Je-Au. 



4. P. elliptica Nutt. Leaf-blades oval, acute at the base, rounded, retuse 

 or short-acuminate at the apex, rather thin, crenulate and the teeth often cal- 

 lous-mucronate, 1.5-6 cm. wide, 2-8 cm. long; bracts narrowly lanceolate to 

 subulate; sepals triangular-ovate, acute or acuminate, often less than 2 mm. 

 long; petals greenish white, oval, 5-6 mm. long. Rich woods: N.S. — D.C. — 

 Minn.— N.M.— B.C. Submont.— Mont. Je-Au. 



5. P. chlorantha Swartz. Leaf-blades orbicular to broadly oval or obovate, 

 crenulate, thick, but rather dull, roimded or acute at the base, 1-4 era. wide; 

 sepals triangular-ovate, about 1.5 mm. long, obtuse or acute; petals greenish 

 white, oval, about 7 mm. long. In woods and swampy places: Lab. — D.C. — 

 Calif. — B.C.; n Eu. Submont. — Subalp. Je-Jl. 



6. P. dentata Smith. Leaf-blades spatulate or oblanceolate, tapering at 

 the base, acute or obtuse at the apex, callous-denticulate, thick, dull, 1-2 cm. 

 wide, 1.5-4 cm. long; sepals triangular-ovate, acute, about 1.5 mm. long; petals 

 oval, 5-6 mm. long, greenish or purplish. In woods: B.C. — Calif. — Mont. 

 Submont. — Mont. Je-Au. 



7. P. picta Smith. Leaf-blades ovate or oval, acute at both ends, caUous- 

 denticulate, firm and coriaceous, blotched white above and purple beneath, 1-5 

 cm. wide, 1-6 cm. long; sepals triangular-ovate, acute, about 1.5 mm. long; 

 petals oval, greenish or purplisli, about 6 mm. long. Woods: B.C. — Calif. — 

 Ariz. — Colo. — Mont. Submont. — Mont. Jl-Au. 



8. P. aphylla Smith. Proper leaves usually replaced by lanceolate scales, 

 only on sterile shoots sometimes producing small lanceolate green leaf -blades; 



