59 305 



Venis pellucidis, indivisis, 5—7 jugis, utrinque prominentibus. Soris margini ap- 

 proximatis, exinvolucratis(?); sporangiis glabris. 



This new species is most probably the plant mentioned by Sodiro under his 

 Nephrodium concinniim (Crypt. vase. quit. 233). It certainly resembles not a little 

 D. concinna in habit, but it is widely different in its creeping rhizome, rigid texture, 

 glabrous sporangia and especially in the presence of scales on rachis and costæ 

 beneath. It is rather doubtful, if Sodiro's Nephrodiiim concinnuin is the true D. 

 concinna, as his N. stenophyllum is synonymous with it and he states that his N. 

 concinnum has a creeping rhizome. 



Amongst the other creeping species D. Rosenstockii mostly resembles D. rivula- 

 rioides, but it differs in its scales, its simple, pellucid veins and firmer texture. 



44. Dryopteris pachyrachis (Kze.) O. Ktze. Rev. Gen. PI. 2: 813. 1891 — [Fig. 31]. 



Syn. Aspidium pachyrachis Kze.; Mett. Pheg. und Aspid. 83. 1858; Nephrodium 

 pachyrachis Hk. sp. 4: 100. 1852; Hk. & Bak. Syn. 270. — Aspidium helveolum Fée, 

 Cr. vase. Brés. 1: 132 tab. 42 fig. 2. 1869 (Glaziou n. 2364). — Aspidium Berteroanum 

 Fée, I.e. 133 (vix 11 mém. 77 tab. 22 fig. 1) (Glaziou r\.2Z&b). — Aspidium platyrachis 

 Fée, 1. c. 2: 71 tab. 100 fig. 2. 1872-73 (Glaziou n. 5261). — Nephrodium Jenmani 

 Bak.; Jenman, Journ. Bot. 1877: 263; Dryopteris Jenmani C. Chr. Ind. 272. 1905. 



Type from Venezuela: Mérida, leg. Moritz n. 409 (HB!). 



Specimens examined: 



Jamaica, Jenman (HB = N. Jenmani Bak.). 



Venezuela, Moritz n. 409 (HB). — Fendler n. 472 (HB). 



Brasilia, Glaziou n. 2364, 2365, 5261, 7951 (HH), 15764 (HB). — Caldas, H. 

 Mosen n. 2151 (HS. HB), 2152, 2154 (HS), 2702 (HH). — Ouro Preto, Schwacke (HC). — 

 Serro do Mar, Parana, Dusén n. 3725 (HC). 



I add to Mettenius's description: 



"Rhizoma crassum ascendens, subterraneum, 0,1 metro longum" (Mosen in 

 sched.). Stipitibus crassis (c. 1 cm.), vix ultra 10 cm. longis, glabris, versus basin 

 squamis deciduis instructis. Rachibus robuslis, quadrangularibus, glandulosis. 

 Lamina speciminis maximi 1 m. longa, medio 36 cm. lata, costis superne inlerdum 

 sparse setosis exceptis glaberrima, sed subtus glandulis rubinis distinctis instructa, 

 gramineo-vel pallide-viridi, membranacea vel papyracea. Pinnis ad basin aêro- 

 phoro + distincte squamæforme vel subaculeiforme instructis, alternis, mediis 

 ad 18 cm. longis, 2 cm. latis, a basi truncata versus apicem acuminatum sensim 

 decrescentibus, inferioribus 4 — 5 cm. disfantibus, gradatim reductis, inliniis 1 — 2 cm. 

 longis. Laciniis recte patentibus, obtusis vel subacutis, basalibus parum majoribus. 

 Venis indivisis, 7 — 10 jugis. Soris medialibus. Indusiis ovato-reniformibus, persi- 

 stentibus, glandulis rubinis distinctis instructis, raro sparse setosis. 



This distinct species may be easily distinguished by its size and its nearly 

 quite glabrous leaf with the characteristic large, wine-coloured, sessile glands on 

 the under surface of the lamina. Such glands, however, seem to be absent in the 



40* 



