264 212 
one third of the way to the costa; along the edges of this membrane run the fol- 
lowing 2—3 veins from the same costule to sinus; as a rule they run closely side 
by side, but sometimes they are found to be united. This being the case the 
venalion is very similar to that of D. glandulosa. Sori medial, small, exindusiate. 
Sporangia glabrous; receptacle with stellate hairs. 
The typical form of D. megalodus is probably common in most of the Lesser 
Anlilles. In Central-America a larger form occurs, which can not always easily be 
distinguished from D. nephrodioides var. Biolleyi, especially if the apex of the frond 
is wanting. True D. megalodus has a distinct terminal pinna similar to the lateral 
ones and is exindusiate. METTENIUS says that he has seen indusium in D. megalodus 
(Fil. Lechl. II. 21.), but the specimens examined by him (now in B) all belong to 
D. nephredioides. 
Specimens seen: 
Trinidad: Hanr nr. 3771 (W), 4120 (C); FENDpLEn nr. 21 (W); Preuss nr. 1463 (B); BRoapway nr. 3648 (RB). 
St. Vincent: H. H. and G. W. Snir nr. 858 (C); EccEns nr. 6641 (W). 
Martinique: SrEBEnR Syn. Fil. exs. nr. 160 (B). 
Porto Rico: Baxsis (B); EcGERS nr. 974 b (B, RB). 
San Domingo: Mayeruorr nr. 103 (B); PnENLELOUP nr. 727 (C); Wricut, Parry and BRUMMEL sine 
num. (W). 
Cuba: Valley of Rio Bayamita, Maxon nr. 3973 (W) — Farallones of la Perla, Maxon nr. 4387 (W) — 
above Jaguey, Yateras, Maxon nr. 4415 (W) — Monte Verde, Wricur nr. 1010 pt. (S). 
Venezuela: Caracas, Moritz nr.50 (B) — Lower Orinoco, Ruspy and Squires nr. 388 (B, W); STEVENS 
(W) — Puerto Cabello, Appun nr. 29 (RB). 
Colombia: Sta. Marta, H. H. Smirn nr. 2690 (C). 
Ecuador: Rimpacu nr. 104 (R). 
Costa Rica: WERCKLE (C). 
Guatemala: Cubilquitz, Alta Verapaz, v. TuERCKHEIM, ed. J. Donn. SmirH nr. 8812 (W). 
264. Dryopteris leucophlebia (Christ) C. Chr. Ind. 274. 1905. — Fig. 41 b. 
Syn. Aspidium leucophlebium Christ, Bull. L'Herb. Boiss. II. 4: 961. 1904. 
Type from Costa Rica, leg. WrnckrÉ 1904 (C). 
A most distinct species, in cutting not unlike D. hastata, but much larger, in 
pubescence like D. megalodus, but less cut. In the type specimen, the leaf differs 
in shape from the other species of this section, with which it otherwise best corre- 
sponds, by its upper pinn: being sessile with a broad base, adnate to rachis, widest 
on the lower side, and upwards at least confluent with the hastate lobed apex, 
thus not having a dislinct terminal pinna. Such a one, however, present in another 
specimen from Costa Rica, which otherwise does not at all differ. — Pinne (the 
lower ones shortly stalked and cuneate at base) about 20 cm long by 4 em broad, 
shallowly lobed, pale-green, firmly herbaceous, apparently glabrous, but by using a 
strong lense both surfaces are seen to be furnished with scattered, microscopical 
4—6 branched hairs, which are best seen on the cost: and costule beneath. Rachis 
very finely puberulous by sessile, branched, deciduous hairs. Lobes obtusely rounded, 
subfalcate, crenate. Veins 10—12, the two basal opposite ones anastomosing under 
