256 
Davie . — The Structure and 
J. Smith, in Hooker’s ‘Journal of Botany iv, 1842, p. 191, assigns it, 
with Peranema and Woodsia , to the Aspidieae. 
By Sir W. J. Hooker (‘ Genera Filicum t. 99, and f Species Filicum ’), 
it is placed beside Peranema in the Dicksonieae, sub-tribe Woodsieae. 
In the ‘Synopsis Filicum’ (Hooker and Baker, ’ 74 ), it appears next 
to Alsophila and between it and Matonia , accompanied by the comments 
(p. 45) : ‘ This genus seems more appropriately placed with the Cyatheae 
than with the Dicksonieae. The fronds much resemble those of Davallia 
nodosa ’ (which is the original Acrophorus of Presl). The close resemblance 
between Diacalpe aspidioides and Davallia nodosa is mentioned also by 
C. B. Clarke in the ‘ Review of the Ferns of Northern India ’ (‘ Trans. Linn. 
Soc. ’, 2nd ser., vol. i, pp. 434 and 445). 
Captain R. H. Beddome in ‘The Ferns of Southern India’ (1863) 
separates Peranema and Diacalpe as the group Peranemeae of the Polypo- 
diaceae. This group comes between the Davallieae (including Microlepia 
and Davallia ) and the Cyatheae (with Cyathea and Alsophila ). 
Raciborski (’ 98 ) in the ‘ Pteridophyten der Flora von Buitenzorg ’ 
places Diacalpe between Asplenium and Dicksonia in the B. II group of 
Polypodiaceae. 
Diels (Engler and Prantl’s ‘ Natiirl. Pflanzenfam.’) associates Diacalpe 
with Peranema , and these two with Woodsia , Hypoderris y and Acrophorus 
in the Woodsieae group of Polypodiaceae. 
By Wallich, Diacalpe aspidioides was named Aspidium foliolosum (Cat. 
no. 359) and Sphaeropteris Hookeriana (Cat. no. 775). Following on this 
Presl, though he puts ‘ Diacalpe aspidioides , Bl.’, among the insufficiently 
described genera, calls Aspidium foliolostim by the name Cys top ter is gig an tea , 
and places Cystopteris next to Acrophorus. 
By Kunze (‘ Anal. Pterid. p. 43) Diacalpe was named Physematium 
aspidioides. Another species of Physematium (P. molle , Kaulf.) is called 
Woodsia inexicana by Robert Brown (‘ Miscellaneous Works ii, p. 547), who 
remarks that it is closely related to Peranema cyatheoides. These con- 
fusions of nomenclature, all converge on a grouping together of Peranema , 
Diacalpe , Woodsia , and Acrophoms. 
The hint of a relationship between Diacalpe and the Aspidieae given 
directly by J. Smith, and by Wallich in the name Aspidium foliolosum , is 
confirmed by Christ in a review of Christensen’s ‘ Index Filicum * (Hedwigia, 
1908, xlvii, p. 145): ‘ Peranema , Diacalpe , Acrophoms einerseits, Woodsia 
und Cystopteris andererseits, werden wohl schliesslich auch zu den Aspidieae 
(bei Lastrea) gezogen werden miissen.’ 
