160 SAXIPRAGACEAB 



Fam. 4. PARNASSIACEAE Dumort. Grass-of-Parnassds Famii<y. 



1. PARNASSIA I.. 



1. Farnassia Caroliniana Michx. Caroi,ina Grass-OF-Parnassus. 

 (Man. p. 476 ; I. v. /. f8j2.) In swamps and low meadows, N. B. to 

 Man., Va., 111. and Iowa. — Pennsylvania: Northampton; Bucks; 

 Erie, Presque Isle. 



Family 5. SAXIFRAGACEAE Dumort. Saxifrage Family. 



Capsules 2-celled : placentae axile. 1 . Saxipraga. 

 Capsules i-celled : placentae basal or parietal. 



Placentae basal. 2. Tiarblla. 

 Placentae parietal. 

 Petals present ; terrestrial plants. 



Stamens 5 : petals entire. 3. Hetjchera. 



Stamens 10 : petals pinnatifid. 4. Mitella. 



Petals wanting : aquatic plants. 5. Chrysosplenium. 



1. SAXIFRAGA L. 



Filaments clavate. i. S. micranthidifolia. 



Filaments subulate. 

 Scapes less than 3.5 dm. tall : leaf-blades short : cymules becoming raceme- 

 like. 2. S. Virginiensis. 

 Scapes over 4 dm. tall; leaf -blades elongated : cymules compact. 



■ 3. 5. Pennsylvanica. 



1. Sazlfraga micranthidifolia (Haw.) B.S.P. LETTUCE Saxifrage. 

 (Man. p. 479; I. F. y. 1832.) In cold brooks, Pa., and along the 

 mountains to N. C. — Pennsylvania : Northampton ; Somerset, I/anrei 

 Hill. 



2. Sazifiraga Virginiensis Michx. Early Saxifrage. (Man. p. 479 ; 

 I. F. /. /8j3.) lu dry and rocky woodlands, N. B. to Minn., Ga. and 

 Tenn. — Pennsylvania : Northampton ; Monroe ; Bucks ; Chester ; 

 Lancaster ; Huntingdon ; Delaware ; Allegheny. 



3. Saziiraga Fennsylvanlca L. Pennsylvania or Swamp Saxi- 

 . FRAGE. (Man. p. 479; I. F. /. 1831.) In swamps and on wet banks, 



Me. to Minn., Va. and Mo. — Pennsylvania : Northampton ; Monroe; 

 Lancaster ; Bucks ; Chester ; Lebanon ; Franklin ; Huntingdon ; 

 Somerset ; Delaware ; Allegheny. 



2. TIARELLA L. 



1. Tiarella cordifolia L. Coolwort. False Mitrewort. (Man. 

 p. 48a; I. F. / J842.) In rich, moist woods, N. S. to Ont.., Minn., and 

 especially along the mountains to Ga., Ind. and Mich. — Pennsylvania: 

 DELAWARE ; Monroe ; Wayne ; Tioga ; Sullivan ; Blair ; Arm- 

 strong ; Fayette]; Somerset; Erie; Allegheny. 



3. HEUCHERA L. 



Flower-stalks leafless. i. H. Americana. 



Flower-stalks leafy. 

 a. Hypanthium turbinate ; stamens slightly if at all surpassing the petals. 



2. H. pubescent. 



