UNDERWOOD: REVIEW OF THE GENERA OF FERNS 279 
Gymnopteris Bernh., 1799 (Acrostichum rufum L.).* 
GvMNocRAMMA Desv., 1811 (Pteris rufa), 
GYMNOSPHAERA Blume, 1828 = Alsophila. 
Haplophlebia Mart., 1828—34 = sub-genus Alsophila. 
Helminthostachys Kaulf., 1824 (Osmunda Zeylanica L. !). 
OrniALA Desv., 1827 (O. Zeylanica!). 
BorRvoPrEnis Presl., 1830 (B. Mexicana). 
Hemionitis L., 1753 (77. palmata). 
Hemitelia R. Br., 1810 (Cyathea multiflora Swz.). 
Hippopium Gaud., 1826 = Didymochlaena ! 
Humata Car., 1801 (77. ophioglossa). 
HvpRocrossuw Willd., 1802 = Lygodium. 
HyMeEnoteris Kaulf., 1824 = Belvisia Mirbel. 
Hymenophyllum J. E. Smith, 1793 (Trichomanes Tunbridgense L.). 
Prycnomanes Hedw., 1800 (Trichomanes asplenoides Swz.). 
WinELIA Bernh., 1801 (Trichomanes Tultifidum Forst.). 
Hymenostachys Bory., 1824 (47. diversifrons /). 
Hymenotomia Gaud., 1826 = Lindsaea. 
Hypoderris R. Br., ? 1830 (established later than 1831). 
Hypolepis Bernh., 1806 (Lonchitts tenuifolia). 
Hypopeltis Richard, 1803 (no type). 
Jamesonia Hook. & Grev., 1831 (J. pulchra). 
Kaulfussia Blume, 1828 (K. aesculifolia). 
Lastrea Bory., 1824 = Dryopteris. 
Lecanopteris Blume, 1828 (Z. carnosa /). 
ONYCHIUM Reinw., 1825 ost —(—9€ 
The recent OE of Engler: -Prantl, Die ye Phlanzenfamilien, 
rating to the ferns, have reached us just before the last page proofs of this article were 
rned to the printer, and while giving us in the main a much more rational classifica- 
tion Ba the ferns, still contain many interesting muddles which amply illustrate the lack 
of system among taxonomists who follow a hap-hazard system, or better no ag ot at all 
in the matter of generic types. A inge instance will sufficiently illustrate this point. 
As noted above Gymmnopteris Bernh. was based on a single species ( Acrosticta rufum 
L.). Now in pum natürlichen peliiai die S Bernh." 
198-202) as a large tropical genus of thirty species, but the only species known to 
Bernhardi and Sene one on which he founded the genus does not appear among them! 
the contrary, Acrostichum rufum L., which stood as the monotype of Bernhardi's 
Gy mnopteris in 1799, wide eaded the list of the dozen species which Desvaux in 1811 
marshalled under his new genus Gymnogramma, appears in this most recent utterance 
of the Berlin code der idt of these genera, but with other species under 
gramme (p. 262, f. r39 B), a genus founded by Link in 1844!!! Surely some tax- 
onomists have yet to learn the fundamental principles of stability in nomenclature ! 
