GENUS I. 



PARNASSIA FAMILY. 



3. Parnassia Kotzebuei C. & S. Kotzebue's Grass- 

 of-Parnassus. Fig. 2147. 



Parnassia Kotzebuei C. & S. Linnaea i : 549. 1826. 



Scape slender, $'-f high, leafless, or sometimes with a 

 single sessile oval leaf near the base. Basal leaves short- 

 petioled, membranous, ovate or oval, narrowed or sometimes 

 cordate at the base, 3 "-12" long; flower 4"~5" broad, calyx- 

 lobes oblong, equalling or slightly shorter than the elliptic 

 white 3-5-veined sessile petals; staminodia 3-5 at the base of 

 each petal, rather slender, united below. 



Quebec to Labrador, Alaska, Alberta and Wyoming. Summer. 



4. Parnassia palustris L. Marsh or 



Northern Grass-of-Parnassus. 



Fig. 2148. 



Parnassia palustris L. Sp. PI. 273. 1753. 



Scape slender, 3'-i2' high, bearing a 

 clasping ovate leaf below the middle, or 

 rarely leafless. Basal leaves slender-peti- 

 oled, ovate, obtuse at the apex, usually cor- 

 date at the base, g"-i&" long; flower 6"- 

 12" broad ; calyx i-4 shorter than the 

 elliptic few-veined sessile petals; stamino- 

 dia 9-15 at the base of each petal, slender, 

 united below. 



In wet places, Newfoundland, Quebec and 

 Labrador to the Canadian Rocky Mountains 

 and Alaska, south to Minnesota, Michigan, 

 North Dakota, and in the Rocky Mountains to 

 Wyoming. Also in Europe and Asia. July- 

 Sept. 



5. Parnassia parviflora DC. Small-flowered 

 Grass-of-Parnassus. Fig. 2149. 



Parnassia parviflora DC. Prodr. i: 320. 1824. 



Scape 4'-i2' high, very slender, usually bearing 

 a clasping oval leaf at about the middle. Basal 

 leaves petioled, oval or ovate, narrowed at the base, 

 not cordate, 6"-i2" long; flower 4"-8" broad; sepals 

 equalling or somewhat shorter than the elliptic 

 sessile petals; staminodia 5-7 at the base of each 

 petal, slender, united below. 



In wet places, Newfoundland and Labrador to Alaska, 

 Quebec, Michigan, Wisconsin, and in the Rocky Moun- 

 tains to Colorado and Utah. July-Sept. 



