. . SAX1FBAGACEAE. 169 



Family 4. PARNASSIAOEAE Dumort. Grass of Parnassus Family. 



1. PARNASSIA L. 

 1. Parnassia Caroliniana Michx. Grass of Parnassus. M. p. 476. Wet 

 ban^ks. Summer. 

 Bucks— (P.)." Lehigh— Black River bog (Kr.)*. Northampton— Baa- 

 ton, A. P. Gather (B. C). , 

 Ocean— itfew Egypt (C). 



Family 5. SAXIFRAOACEAE Dumort. Saxifrage Family. 



^Placentae axial, !•' 1, Sasctifraga. 



Placentae almost basal. . i , ,2, Tiar ella. 



Placentae, parietal. 



Petals present; terrestrial plants. 



Petals entire. 3.' Heuchera. 



Petals lobed or pinnatifid. . 4. Mitella. .,, 



Petals, none jrsniall aquatic plants. , 5. Chrysosplejtium* 



1. SAXIFRAGA L. Saxifrage. 



Plaints large, 3-10 dm. tall) growing in wtet places. 



Leaves merely denticulate or repand; follicles ovoid. 



, ' 1. S. Penns'ylvanica. 



"■ Lekve's coarsely and sharply dentate; follicles lanceolate. 



2v S. mioranthidifolia. 

 Plants low, 5-45 cm. tall, growing in dry or rocky places. 



, , :■:,■-, ,,- ,■.;,» _;i „,; ; -;< n'l. :'■ ' 3. <S. Virginiensis. 



1. SiAXiFKAiGAspBiNNSYLVANiCA L. Swamp Saxifrage. M. p. 479. .Bogs. 

 ■ ' •■ Spring. .' .i . ,,-■-■; 



2. SaxifraGa mioranthidifolia (Haw.) B. S. P. . Lettuce Saxifrage. M. p. 



479. Cold mountain brooks. Spring. 

 , , . Lehig h-~ Allentown, \4. P.,Gaxber (B. G.), Idlewild, Lehigh Mountain 

 (Kr.). Northampton — Bethlehem, Dr. J. B. Brinton, (He.).. 



3. Saxifraga Virginiensis Michx. Early Saxifrage. M. p. 479. Exposed 



rocks and jdiiyi .hillsides. Early spring. ? , 



2. TIARELLA L. 

 1. Tiarella' cordifolia L. False Mitrewort. M. p. 480. Moist woods. 

 Early spring. 

 Delaware — Crum Creek, James Howard (Fu.). ' 



3. HEUCHERA L. Alum-root. 



Stem with 1-3 leaves. 1. H. Curtisii. 



Stem strictly scapose. 2. H. Americana. 



1. Heuchera Curtisii T. & G. M. p. 481. Rich woods. Spring. ": 



Lancaster — Lancaster, Mart. (B.,C), Safe Harbor (Ca.), York Fur- 

 nace (Cr.). 



2. Heuchera Americana L. M. p. 482. Rocky woodlands. Summer. 



4. MITELLA L. 



1. Mitella diphylla L. Mitrewort, Bishop's-cap. M. p. 483. Rich 

 woods. Spring. 



