168 



116 



30 — 40 cm broad), glabrous leaf-tissue and less pubescent ribs; keel inconspicuous 

 or absent, but then a broad, cartilaginous membrane is seen between the basal 

 veins. Sori medial, indusium glabrous or finely pubescent. 



Having not seen two speci- 

 mens, which are quite identical, and 

 not being able of distinguishing 

 the forms from IJ. Leprieurii by 

 several characters, I prefer to refer 

 all the specimens hereto, although 

 it is very probable that at least 

 some of them belong to a distinct 

 species. 



Brazil: Matto Grosso, Santa Anna da Cha- 

 pada, Malme *h 1902 (Rg. — very 

 beautiful and large specimens with 

 very acuminate pinnæ) — Minas 

 üeraes: Lagoa Santa, Warming (Hi. 



Bolivia: Mapiri, Rusby nr. 426 (CC, thin 

 leaved; sori supramedial;. 



Peru: St. Gavan, Lbchler nr. 2468 (B). 



var. minor Hieron. Hedwigia 

 46: 328. 1907. 



Ecuador, in valle Pastaza, 

 Stiibel nr. 965 (B). 



184. Dryopteris praetervisa 



(Kuhn) O. Ktze. Rev. 2: 813. 1891; 



C. Chr. Ind. 285. — Fig. 21 b. 



Syn. Aspidium praetervisiim Kuhn, 

 Linnaea 36: 111. 1869. 

 Nephrodium praelervisum Bak. 

 Syn. Fil. 495. 1874. 



Fig. 21. a. D. densiloba C. Chr.; b. D. praeteruisa 



(Kuhn) O. Ktze.; c. D. Leprieurii (Hook.) O. Ktze.; 



all from the type-specimen. Pinnæ X ■'/s, 



segments X l'la. 



Type from Venezuela, Tovar, Fenoler nr. 371 (Kew!). 



A critical species and perhaps a variety of D. Leprieurii. It differs from that 

 species by the perfectly glabrous leaf-tissue, the costæ and costulæ only being 

 sparsely setose by short hairs; rachis rather densely hut shortly pubescent. Veins 

 10 — 12-jugate, much raised above. Keel distinct beneath but nol reaching the costa. 

 Sori supramedial, sometimes close to the margin, in the only specimen seen con- 

 fined to the lower two anterior veins and to two or three upper veins at the apex 

 of the segment. — Lamina firm, papyraceous, glossy above, very gradually narrowed 

 upwards into a long-acuminated apex. This last character is perhaps the most 

 marked one. Aërophores distinct. 



