anes 
transeuntibus. Segmentis densis, linearibus, parallelis, valde obliquis, obtusis vel 
oblique acutis, ca. 8 mm longis, 2'/2 mm. latis, basalibus binorum jugum _ inferi- 
orum paullo diminutis, ceterorum proximis aequalibus. Rachibus antice dense 
strigoso-hirtis, postice pilis patentibus brevibus (paucis longioribus  intermixtis) 
puberulis; costis supra breviter strigosis, subtus cum costulis glabris; nervis 
lateralibus simplicibus, pellucidis, c. 6-jugis. Soris margini appropinquatis; indusio 
firmulo, persistente, margine breviter glanduloso-fimbriato, ceterum glaberrimo, spo- 
rangiis glabris. (Rosenstock descripsit). 
Allied to D. oligocarpa from which it differs in its more glabrous frond, distinet 
indusia, oblique segments (recalling those of D. ptarmica) and suddenly reduced lower 
pinne. — Dr. Rosenstock says that he has the. same species from Petropolis, 
near Rio de Janeiro, Tu. ScHNappP nr. 51, which I have not seen. 
62. D. pachyrachis (Kze.) O. Ktze. 
Probably this includes several forms of spe- 
cific value. D. Tamandarei Ros. Hedwigia 56: 
365—366. 1915 presumably falls under it; Brazil: 
Sao Paulo, BrabE nr. 6534 (not seen). 
71. Dryopteris arborea Brause, Fedde Repert. 
13: 294, 1914; C. Chr. Amer. Fern Journ. 4: 80. 
1914..— Fig. 4. 
Syn D. roraimensis Brause, Notizbl. bot. 
Gart. u. Mus. Berlin-Dahlem 6: 109. 1914 (non 
C. Chr. 1905). 
British Guiana: Mt. Roraima, ULE nr. 
8526 (B!). 
A very interesting species with a caudex 
said ‘to be 1—2 meters high and with very 
long and narrow leaves (about 11/2 m long by 
scarcely 20 cm broad). Rachis atropurpureous, 
’  pinnz opposite, distant, in cutting and venation 
Fig. 4. D. arborea Brause. Pinna from resembling D. pachyrachis, articulated to rachis. 
the upper third of a leaf, nat. size, and The whole 
two segments 2. 
leaf by its length much re-_ 
sembles that of D. euchlora var. inaequans, 
but its pinne are different; its nearest ally is 
» which perhaps is a variety of D. euchlora and has 
but its pinnz closely resemble those of D. conformis. 
