203 255 



always spring out from the costule 1 mm above the costa (fig. 43 c), occasionally meni- 

 scioid. Sori about medial, the lowermost ones still often near the point, where the 

 basal veins meet and generali}' 2—3 mm remote from the costa, thus leaving a disc 

 along the middle of the pinna free of sori. Indusium not seen; sporangia glabrous. 



D. vivipara varies mainly in texture and shape of pinnæ. Some forms are thinly 

 membranaceous, others coriaceous. From the type I cannot distinguish certainly 



Aspidiuin macropus Mett. Fil. Lechl. '2: 20. 1859, based on Claussen nr. 112 (B). 

 Mettenius found it different from D. vivipara by its having a small indusium, which 

 I have not found. It is a large form with pinnæ up to 15cm long; the rhizome 

 seems to be erect and is densely clothed with red-brown scales. To me it is only 

 a large form of typical D. vivipara. A more distinct variety is 



var. platypes (Fée). 



Syn. Goniopteris platypes Fée, Cr. vase. Br. 1: 106 tab. 33 ''fig. 3", left-hand 

 figure. 1869. 



Differs from the type by its glossy, dark-green papyraceous leaf and large size. 

 Pinnæ up to 20 cm long, 3 — 3'/2 cm broad, cuneate at base, margins serrulate. 

 Veins about 6, much upcurved, the anterior basal one often springing out from 

 the costa. — The type specimen of this variety (Glaziou nr. 2402), which Baker 

 most remarkably referred to D. tetragona looks a distinct species, but it is connected 

 with the type by numerous intermediate forms. 



D. vivipara is a common species in Southern Brazil and it is one of the very 

 few species, which occur in almost identical forms in the Andes. I name some 

 collector-numbers : 



Brazil: Rio, Glaziou nr. 409 (H), 7321 (Bl; Sellow nr. 198 IB); Burchell nr. 936, 968 (B); Claussen 

 nr. 2112 iB); Mosen nr. 85 pt. |B, H, Rg), 2682 Rg); Regnell nr. 260 (Rg) - Sta. Catha- 

 rina, Blunienau, H. Schenk nr. 171 (C) — Parana, Villa Nova, Annies, Rosenst. Fil. Austr. 

 Bras. nr. 104 (Rg, W). 



Columbia: Cundinaraarca, Wercklé 1906 (C); Karsten nr. 60 (B); Lindig nr. 193 i^B). 



Costa Rica; Rio Surubres, 400 m., A. et C. Brade nr. 420 (R). 



var. platypes (Fée). 



Brazil: Rio, Glaziou nr. 2402 (Herb. CossON, Paris, H); Mosen nr. 85 part. (H) Jelinek nr. 140 part. (B). 



256. Dryopteris straminea (Bak.) C. Chr. Index 294. 1905. — Fig. 43 b. 



Syn. Polypodium salicifolium Hook. sp. 4: 242. 1862. 



Polypodium stramineum Bak. Syn. 316. 1867. 

 Type from Venezuela: Tovar, leg. Fenoler nr. 474 (Kew!). 

 Nearly exactly D. vivipara in size, texture, entirely glabrous frond, the carti- 

 laginous margins and gemmiferous rachis, but veins all free, about 4 to a side, the 

 two basal ones terminating in the leaf-tissue and the posterior one springing out 

 from the costa. Pinnæ crenate or slightly lobed. It is not unlikely a variety of 

 D. vivipara. 



33* 



