21. DENNSTAEDTIA Bernh. 
In memoriam Deitnstacdtii^ autoris florae Vhtari- 
ensis^ getter i ^toinen tribui, Bernh. 1801. Schrad. Jour. 
Bot. 1800 : 2 pt. 1 24. 
Rootstock slender, creeping. Leaves of delicate texture. 
Sori small, marginal, at the end of the free yeinlets. In- 
dusium cup-shaped. 
1. D. punctilobula (L. C. Rich.) Moore. 
Nephi'odiiuji punctllobulum L. C, Rich, ; Mx. 
Fl. 2 : 268. 
Dlcksonia pilosiusctda Willd. 1809. Enumer. 
1076. Eatoii^ Ferns N. Am. i : 339. t. 44; in 
Gray, Man. 691. Clute^Y^xw^ 229. Waters^ 
Ferns 286. 
Dlcksonia pimctllobida Hook. 1846. Sp. Fil. 
I : 79. Undei'w . in 111. Fl. 1:12. 
Dennstaedtla punctilobula AIoo?'e^ 1^57- Ii^<^ex 
Fil. 97. Underw. Nat. Ferns 122; in Britt. 
Man. 19. 
Bour.DKR Fkrn. 
Plants 6 dm. or higher; leaves oblong-lanceolate, 
3-pinnntifid ; pinnae rather distant, 11 cm. or less 1., 4 
cm. or less wide, oblong-lanceolate ; pinnules oblong, 
decurrent on the rachilla, deeply pinnatifid ; lobes vari- 
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