UnpERWooD: REVIEW OF THE GENERA OF FERNS 261 
1793 
G. F. Hoffman (Comm. Soc. Reg. Sci. Gott. 12: 29. A. 5) es- 
tablished the genus Axgiopteris with a single species based on 
Polypodium erectum Forst. Since the existence of Angiopteris 
Adans. 1763 (adopted from Mitchell) makes this a homonym, the 
strict application of the Rochester code would necessitate the se- 
lection of a new name for this long established and well-known 
genus. Since Angiopteris Adans. is based. on Onoclea sensibilis 
and that is the sole species of Onoclea L. as published, Angiopteris 
Adans. is absolutely a dead name, with no possibility of resurrec- 
tion, so long as 1753 remains a starting-point. Only a quibble 
over a technicality more worthy a pettifogger than a botanist 
would needlessly displace the name well established by Hoffman. 
1796 
Dryander published a paper: On Lindsaea, a new Genus of 
Ferns (Linn. Trans. 3:). The preliminary diagnosis of the genus 
had already been outlined by Smith (see above, 1793), whence the 
genus must date, but in this paper Dryander gives more detail to- 
gether with five plates illustrating the species; nine species are 
included, commencing with the simple leaved ZL. sagittata, L. 
Guianensis forming the seventh. The paper was read November 
4, 1794, and the addition containing the ninth species is dated 
April 23, 1796, evidently added just before printing. The volume 
bears the date noted above, which constitutes publication accord- 
ing to modern ideas. 
1799 
Bernhardi (Schrader's Journ. 1: 297) established the genus 
Gymnopteris based on Acrostichum rufum (Pteris rufa L. Sp. PI. 
1074. 1753) a name which has been unfortunately replaced by 
Gymnogramma. He further characterized twenty genera besides 
Lindsaea and Schizaea which he had not seen. Pteris, Blechnum, 
Woodwardia and Darea were merged with Asplenium while Ceterac 
was united with Vittaria, As he quotes Polystichum Roth, the 
work in which that genus was published (or at least a part of it) 
must have appeared at an earlier date than is usually attributed 
to it, or than appears on its title page. 
