11, JIARELLA. § ZL. 
Stem a scape; or rarely bearing one small leaf. 1. 7. cordifolia. 
Stem leaf-bearing. 
Leaves triangular-cordate. 2. 7. unifoliata. 
Leaves ternately divided, or trifoliolate. 3. 7. trifoliata. 
1. Tiarella cordifolia L. Sp. Pl. 405. 1753. 
Canada to Alabama. 
2. Tiarella unifoliata Hook. Fl. Bor. Am. 1: 238. Al. 8x. 1833. 
Fleuchera longipetala Moc. \con. Fl. Mex. ined. fv. 423. 
Petalosteitra unifolia Raf. Fl. Tell. 2: 74. 1836. 
Oregon to British Columbia. 
3. Tiarella trifoliata L. Sp. Pl. 406. 1753. 
Tiarella stenopetala Presi, Rel. Haenk. 2: 55. 1835. 
Blondia trifoliata Raf. F). Tell. 2: 75. 1836. 
Petalosteira laciniata Raf.1.c. 74. 1836. 
Southern Alaska to British Columbia. 
3a. Tiarella trifoliata laciniata (Hook.). 
Tiarella laciniata Hook. FI). Bor. Am. 1: 239. pf. 77. 1833. 
Vancouver Island ; Washington. 
12, HEUCHERA L. 
Since the publication of “ A Descriptive List of Species of the 
Genus Heuchera,’ Bull. Torr. Club, 17: 191-204, 1890, the origi- 
nal specimen on which H. Curtisii A. Gray was founded has come 
to light. I referred this plant, with doubt, to A. villosa Michx., 
but an examination of the type shows that it is to be referred to 
HI, pubescens Pursh. 
13. LEPTAXIS Raf fl. Tell; 2:. 75... 1896, 
[Totmira T. & G. Fl. N. A. 1: 582. 1840. Not Hook. 1834.] 
1. Leptaxis Menziesii (Pursh) Raf. Fl. Tell. 2: 76. 1836. 
Tiarella Menziesti Pursh, Fl. Am. Sept. 1: 313. 1814. 
Heuchera Menziesti Hook. Fl. Bor. Am. 1: 237. pl. 80. 1833. 
Tolmiea Menziesi T.& G. Fl. N. A. 1: 582. 1840. 
British Columbia to Oregon. 
