83 329 



oblongis, acutis, marginibus dense fimbrialo-ciliatis levolutis, basalibus subaequali- 

 bus. Venis indistinctis, 15 — 18 jugis, siniplicibus. Soris parvis, maigini approxi- 

 niatis, a marginibus revolutis finibriatis oblectis. Indusiis non repartis. 



This new species is intermediate between D. cheilanthoides and D. nervosa, 

 resembling the former in texture and revolute edges, which cover the sori, and the 

 latter in habit and small sori. It is, however, a very distinct new species, well 

 characterized by its revolute edges, which are densely ciliate and recall the indu- 

 sium of certain species of Cheilanthes. In its costæ and costulæ beneath being 

 rather densely covered with soft hairs it resembles D. pterifolia. The aërophore is 

 clothed with long, brown scales, which as a rule have fallen otT in the mature leaf. 

 In general habit the leaf resembles a branch of a species of Gleichenia § Mertensia, 

 thence the name. 



82. Dryopteris cheilanthoides (Kze.) C. Chr. Ind. 257. 1905 — [Fig. 51]. 



Syn. Aspidium cheilanthoides Kze. Linnaea 22: 378. 1849; Mett. Aspid. 84 n. 203. 

 Nephrodium resino- foetid um Hk. sp. 4: 105. 1862; Bak. Syn. 269; Aspidium resino- 

 foetidum Christ, Farnkr. d. Erde 253. 1897; Dryopteris resino-foetida O. Ktze. Rev. 

 Gen. PI. 2: 813. 1891. 



Type from Brazil; leg. Regneli (non vidi). 



"Caudex crassus brevis adscendens e terra apice exserens" (Mosen in sched.). 

 Stipitibus robustis ad 2 dem. longis, stramineis vel brunneis basi fuscescentibus, 

 versus basin squamis 1 cm. longis, brunneis, Iaxis, ovatoacuminatis instructis, sur- 

 sum glabris, glandulosis. Lamina hinceolata, ad 1 m. longa, 2'/i; — 4 dem. lata, 

 utrinque decrescente, coriacea vel subcoriacea, bipinnatifida. Rachibus stramineis 

 vel fuscis, glandulosis et pilis longis, albidis, deciduis plus minusve pilosis. Pinnis 

 numerosis, c. 30 jugis, ad basin aërophoro prominente, acuto instructis, alternis vel 

 suboppositis vel inferioribus sacpe fere oppositis, basi truncata, dilatata sessilibus, 

 lineari-oblongis, acuminatis, mediis ad 2 dem. longis, Vi-2 — 2''ä cm. latis, costis 

 subtus pilis albidis, deciduis sparse pilosis exceptis glabris, sed subtus dense glan- 

 dulosis, pectinato-pinnatifidis, inferioribus 3 — 4 jugis abrupte abbreviatis, infimis 

 minimis, saepe glandulîformibus (Typus IV). Laciniis numerosis, acutis vel sub- 

 obtusis, interdum leviter falcatis, marginibus integris revolutis, 1—2 cm. longis, 

 — posterioribus saepe longioribus — 3 mm. latis, basale posteriore prolongata. 

 Venis indivisis, densis, 12 — 18 jugis, omnibus soriferis. Soris submarginalibus, 

 lineam continuam formantibus, a marginibus revolutis tectis. Indusiis persistentibus, 

 glandulosis. 



This species is probably the most distinct in the group. Even in verj' young 

 fronds the margins are reflexed and adpressed to the under surface quite hiding 

 the young undeveloped sori, and one can take such fronds for a Pteris or Cheilan- 

 thes, still the habit is that of a common Lastrea. — I have not seen the original 

 specimen, but my plants from Brazil agree perfectly with the original diagnosis. 

 It is no doubt this species, which Baker in "Flora Brasiliensis" and other authors 



43" 



