180 Rhodora [NovEMBER 
THE SO-CALLED GENERIC NAMES OF EHRHART'S PHY- 
TOPHYLACIUM. 
Joun HENDLEY BARNHART. 
In discussing the generic names available for Alsinopsis (RHODORA 
21: 10. 1919), Fernald remarked: * Leptophyllum Ehrh. Beitr. iv. 
147 (1789), was based on Arenaria tenuifolia L.” In an extended 
footnote he added: “Surely if Dryopteris satisfies the American Code 
as good publication of a genus, Leptophyllum Ehrh. Beitr. iv. 147 
(1789) based, as stated, on Arenaria tenuifolia L., is admirably pub- 
lished. Some other generic names similarly published on the same 
or adjacent pages, which by the American Code, but not by the 
International Rules, should be taken up are 
PHAEOCEPHALUM Ehrh. |. c., 146 (1789), based on Schoenus 
fuscus L. = RyNcnosrona Vahl (1806). 
HvpnoPurLA Ehrh. l. c. (1789), based on Tillaea aquatica L., 
which was also the type of TILLAEASTRUM Britton (1903). 
TRICHOPHYLLUM Ehrh. |. c. 147 (1789), based on Scirpus acicu- 
laris L. = Erkocnanis R. Br. (1810). 
Monantutum Ehrh. |. c. 148 (1789), based on Pyrola uniflora L., 
which was the type of Mongsss Salisb. (1821). 
Heuicronia Ehrh. l. c. (1789), based on Ophrys spiralis L., 
which was also the type of Inrpruw Salisb. (1812). 
AETOPTERON Ehrh, l. c. (1789), based on Polypodium aculea- 
tum L. = PotysticnuuM Roth (1799). ” 
Acting upon this hint, but without referring to it, House has more 
recently, in two papers.! taken up a number of these so-called “ gen- 
eric" names of Ehrhart and for the first time combined specific 
names with them. He remarks in his earlier paper, “This article 
deals with a set of generie names published by Friedrich Ehrhart 
in 1789," and in the later one, “The genus Aetopteron forms No. 78 
in Ehrhart's list of new genera." On the strength of these assertions, 
some seven new generic names and above a hundred new combina- 
tions have been added to the increasing burden of plant synonymy, 
without the slightest possible excuse. 
1A consideration of certain genera proposed by Ehrhart. Am. Midl. Nat. 6: 
200-207. My 1920.—The genus Aetopteron, Ehrhart. Am. Fern Jour. 10: 88: 
89. S 1920. 
