636 PYROLACEAE 



Flowers solitary; petals spreading; valves of the capsule not cobwebby on the margins. 



2. MONESES. 



Flowers racemose; petals more or less converging, concave; valves of the capsule 

 cobwebby on the margins when opening. 

 Flowers without hjTOgynous disk; petals without tubercles. 



Style exserted, deflexed, curved; stigma narrower than the style. 



3. Ptrol.\. 

 Style short, straight; stigma thicker than the style, peltate. 4. Erxlebenia. 



Flowers with a 10-lobed hypogynous disk; petals with a pair of tubercles at the 

 base. 5. R.\MLSCHLV. 



1. CHIMAPHILA Pursh. Pipsissewa, Prince's Pine. 



Perennial herbs, with more or less cespitose, horizontal rootstock and short 

 leafy stems. Leaves persistent, coriaceous, opposite or whorled, short-petioled 

 and serrate. Flowers perfect, in terminal corjTnbs. Sepals 5, persistent. Cor- 

 olla white or pink, wax-like; petals 5, broad, concave, sessile. Stamens 10; fila- 

 ments very short; anthers incurved; sacs opening by pores at the ends of the 

 basal ascending beaks. Ovary 5-celled; stigma orbicular, peltate, barely 5- 

 crenate; style very short. Capsule 5-celled, the latter loculicidal from the top; 

 valves not cobwebby on the margins; seeds many. 



Leaves lanceolate to ovate, broadest below the middle, usually pale-mottled along the 

 midveins; dilated portion of the filaments hairy. 1. C. Menziesii. 



Leaves oblanceolate, broadest above the middle; dilated portion of the filaments hairy 

 only along the margins. 2. C. occidentalis. 



1. C. Menziesii Spreng. Stem about 1 dm. high; leaves 2-5 cm. long, 

 serrulate, acute; pedimcles 1-3-flowered, 3-6 cm. long; bracts ovate or rotund; 

 sepals orbicular, crenulate; petals orbiculate, not ciliate; capsule globose, 6 mm. 

 in diameter. Woods: B.C. — Ida. — Calif. Je-Jl. 



2. C. occidentalis Rydb. Stems 1-2 dm. high, terete; leaves whorled; 

 blades 3-10 cm. long, oblanceolate, acute, sharply serrate, dark green and shin- 

 ing above, pale beneath; peduncles 5-10 cm. long, corymbosely 4-7-flowered ; 

 bracts narrow; sepals suboibicular or orbicular-ovate, 2 mm. long, rounded and 

 erose-ciliate ; petals nearly orbicular, ciliate on the margin; capsule depressed- 

 globose, 5-6 mm. in diameter. C. umbellala Am. Auth., in part, not Nutt. In 

 dry woods: Mont.^ — N.M. — Calif. — Alaska. Submont. — Mont. Je-Au. 



2. MONESES Salisb. One-flowered Wintergreen, Single Beaxity. 



Perennial herbs, scapose or short-stemmed, with slender rootstocks. Leaves 

 persistent, coriaceous, opposite or in 3's, slaort-petioled, crenate or serrate. 

 Flowers perfect, solitary, on a long peduncle, nodding. Sepals 5 (rarely 4), 

 persistent. Petals white or rose-colored, 5 (rarely 4), orbicular or broadly ovate, 

 spreading. Stamens 10 or 8; filaments short, subulate, somewhat dilated, in- 

 curved. Ovary 4-5-celled; style straight; stigma peltate, with 4-5 narrow, at 

 first erect, at length radiating lobes. Capsule depressed-globose, 4-5-celled, 

 loculicidally 4-5-valved from the summit; valves not wooUy on the edges. 



Leaf-blades orbicular or obovate, crenate, iisually rounded at the apex. 1. AT. uniflora. 

 Leaf-blades ovate, strongly reticulate, serrate, usually acute or acutish at the apex. 



2. A/, reticulata. 



1. M, uniflora (L.) A. Gray. Stem 5-15 cm. high; leaves mostly crowded 

 near the base; blades 8-25 mm. long, acute or rounded at the base, thin; sepals 

 oval, obtuse, 3 mm. long, ciliolate; petals ovate to orbicular, obtuse, 8-12 mm. 

 long; capsule 6-8 mm. in diameter. In woods: Greenl. — Pa. — Colo.- — Ore. — 

 Alaska; Eurasia. Mont. — Siibalp. Je-Au. 



2. M. reticulata Nutt. Stem 5-10 cm. high; leaf -blades rounded-ovate, 

 1-2.5 cm. long, strongly veiny and coarsely toothed; sepals oval, ciliolate; petals 

 white, ovate, obtuse, about 1 cm. long; capsule about 1 cm. in diameter. Shady 

 woods: Wash. — Mont. — Alaska. Mont. 



3. PYROLA (Tourn.) L. Wintergreen. 



Scapose perennials, with slender, stoloniferous rootstocks. Leaves persistent, 

 firm, subcoriaceous, mainly basal, or in one species usually none and replaced 

 by scales. Flowers racemose, nodding, perfect. Sepals 5, persistent, spreading. 



