152 100 



163. Dryopteris pteroidea (Kl.) C. Chr. Index 287. 1905. 

 Syn. Polypodiiim pteroideiim Klotzsch, Linnaea 20: 389. 1847; Hook. spec, fil, 

 4: 255 tab. 280. 

 Phegopteris pteroidea Mett. Aspid. u. Plieg. nr. 3. 1858. 

 Type from Colombia, Moritz nr. 291 and Karsten nr. 40 (B!) 

 Hooker's figure represents very well this characteristic species, still the lower 

 pinnulæ are generally much more reduced than shown in Hooker's plate. It varies 

 mainly in size and cutting; I have seen specimens with pinnæ 50 cm long and 

 pinnulæ 5 — 7 cm long by 1 cm broad. The pinnulæ vary from being fully entire 

 or faintly crenate to deeply lobed especially at the middle. Texture membranous, 

 colour dark-green, surfaces (the sparsely setose costæ excepted) glabrous rachis 

 slender, sparsely and deciduously pilose. Veins generally once furcate bearing the 

 small, exindusiate sori just within the margin; in lobed pinnulæ the veins are 

 pinnately liranched. — I have not seen rhizome and stipe; I believe that the rhi- 

 zome is creeping and Mettenius says (I.e.) that the lower pinnæ are abbreviated 

 or abortive. 

 Colombia, Karsten nr. 40, Moritz nr. 291, Lindig nr. 157, Stïibf.l nr. 478a et 687 (B), Schlim 



nr. 3681 (C). 

 Venezuela, Funck et Schlim nr. 491(C). 

 Ecuador, Spruce nr. 5260, StObel nr. 894 (B). 



164. Dryopteris cochaensis n. sp. 



Syn. Dryopteris biserialis Hieron. Hedwigia 46: 343. 1907, non C. Chr. 



Type from Colombia: Cocha, leg. Stübel nr. 231 (B!) 



D. pteroideae magnitudine, habitu, textura, colore valde similis, difîert: rachi 

 rachillisque dense setosis, pinnis supra ubique minute pubescentibus, soris fere 

 medialibus. 



I think this can safely be distinguished from D. pteroidea by the characters 

 pointed out above. It is certainly very closely related to the former species, very 

 much resembling large forms of it. Pinnæ 35 — 45 cm long; pinnulæ 4 cm long 

 by */3 cm broad, broadly sessile (in D. pteroidea generally subauriculate), the lower 

 ones gradually reduced, central ones the largest and more or less lobed especially 

 in the middle. Veins furcate or pinnate in the lobes, black and pellucid, bearing the 

 round or oblong exindusiate sori just above the furcation at a considerable distance 

 from the edge. 



Prof. HiERONYMUS identified the only specimen of this new species with 

 D. biserialis (Bak.) C. Chr. Baker's species however is a member of the subgenus 

 Ctenitis and, of course, totally different from our species. This is a new instance 

 of the impossibility of determining specimens with certainty after Syn. Fil. 



165. Dryopteris Ruiziana (Kl.) C. Cbr, comb. nov. 

 Syn. Polypodiiim Ruizianiim Klotzsch, Linnaea ''0: 385. 1847. 

 Type from Peru, ad Panatahua, leg. Ruiz nr. 70 (B!). 



