174 CORNACEAE 



Leaves ovate or ovate-lanceolate, acute at the base, silky beneath or slightly villous 

 on and near the veins; inflorescence short-villous; stone as long as broad or longer. 



2. 5. interior. 

 Young branches appressed-strigose or nearly glabrous. 3. S. instolonea. 



3. CHAMAEPERICLIMENUM Aschers. & Graebn. Bunchberry. 



Flowers greenish ; stone smooth, higher than broad. 1. C. canadense. 



Flowers purple ; stone ridged on each side, as broad as long. 2. C. unalaschkense. 



Family 96. PYROLACEAE. Wintergeeen Family. 



Plants leafy-stemmed: flowers corymbose; style very short and ending in the peltate 

 stigma; filaments dilated and hairy at the middle. 1. Chmaphila. 



Plant scapose, with a basal rosette of leaves; flowers racemose or solitary: style evident; 

 filaments subulate, naked. 

 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 hypogynous disk: petals without tubercles. 



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



3. Pykola. 

 Style short, straight: stigma thicker than the style, peltate. 4. EkxlebenI.*^. 



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

 base. 5. Ramischia. 



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



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

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



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

 only along the margins. 2. C. occidentalis . 



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

 Leaf-blades orbicular or obovate, crenate, usually rounded at the apex. 1. M. uniflora. 

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



2. M. reticulata. 



3. PYROLA (Tourn.) L. Wintergreen. 

 Leaves ample, not scale-like. 



Leaves not mottled. 



Leaves not spatulate, dark green. 

 Petals pink or purplish. 



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



Leaf-blades rouud-reniform to orbi cular. 1. P. asarifolia. 



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



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

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



Petals white or greenish. 



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



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

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



Leaves mottled. 7. P. picta. 



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



4. ERXLEBENIA Opiz. l. e. minor. 

 6. RAMISCHIA Opiz. l. r. secunda. 



Family 97. MONOTROPACEAE. Indian Pipe Family. 



Flowers in elongate racemes; corolla gamopetalous, globular or nearly so; einther 



2-awned. 1. Pterospora. 



Flowers in short, few-flowered racemes, or solitary; coroUa of 4-6 erect, distinct petals; 



anthers awnless. 



Flowers solitary; stigma naked. 2. Monotropa. 



Flowers racemose; terminal flower 5-merous, the lateral ones 3- or 4-merous; stigma 



glandular or hairy on the margins. 3. Hypopitts. 



1. PTEROSPORA Nutt. Pine-drops, Giant Bird's-nest. i. P. Andromedea. 



2. MONOTROPA L. Indian Pipe. i. m. uniflora. 



3. HYPOPITYS (DiU.) Adans. Pinesap. l. h. latisguama. 



Family 98. ERICACEAE. Heath Family. 

 Pruit a capsule. 



Fruit septicidal; valves separating from the central columella, which bears the pla- 

 centae; anther awnless. 



