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 

 venation is very similar to that of D. glandiilosa. Sori medial, small, exindusiate. 

 Sporangia glabrous; receptacle with stellate hairs. 



The typical form of D. niegalodiis is probably common in most of the Lesser 

 Antilles. In Central-America a larger form occurs, which can not always easily be 

 distinguished from D. nephrodioides var. BioUeyi, 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. nephrodioides. 



Specimens seen: 



Trinidad: Hart nr. 3771 (W), 4120 (Cj ; Fendler nr. 21 (W); Precss nr. 1463 (B); Broadway nr. 3C48 (RB). 



St. Vincent: H. H. and G. W. Smith nr. 858 (C); Eggers nr. 1)041 (W). 



Martinique: Sieber Syn. Fil. exs. nr. 160 (B). 



Porto Rico: Balbis iB); Eggers nr. 974b (B, RB). 



San Domingo: Maverhoff nr. 103 (B); Prenleloup nr. 727 (C) ; Wright, Parry and Brl'mmel sine 



num. (W). 

 Cuba: Valley of Rio Bayamita, Maxon nr. 3973 |Wi — Farallones of la Perla, Maxon nr. 4387 (W) — 



above Jaguey, Yateras, Maxon nr. 4415 (W) — Monte Verde, Wright nr. 1010 pt. S). 

 Venezuela: Caracas, Moritz nr. 50 (B) — Lower Orinoco, Risby and Squires nr. 388 (B, W); Stevens 



(W| — Puerto Cabello, Appun nr. 29 (RB). 

 Colombia: Sta. Marta, H. H. Smith nr. 2690 (C). 

 Ecuador: Rimbach nr. 104 (R). 

 Costa Rica: Wercklé (C). 

 Guatemala: Cubilquitz, Alta Verapaz, v. Tuerckheim, ed. J. Donn. Smith 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. Wercklé 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 pinnæ 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 distinct terminal pinna. Such a one, however, present in another 

 specimen from Costa Rica, which otherwise does not at all ditfer. — Pinnæ (the 

 lower ones shortly stalked and cuneale at base) about 20 cm long by 4 cm 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 costæ and costulæ beneath. Rachis 

 very finely puberulous by sessile, branched, deciduous hairs. Lobes obtuselj' rounded, 

 subfalcate, crenate. Veins 10 — 12, the two basal opposite ones anastomosing under 



