158 106 
2. Group of D. decussata (Glaphyropteris proper. Lamina not narrowed 
downwards and without glanduliform pinnz. Still I find along the stipe of a spe- 
cimen named Polypodium Percivalii, which is no doubt a form of D. decussata, 
several long, projecting aérophores which certainly indicate the place of non- 
developed pinnz. Rachis and coste beneath finely downy by short, simple hairs 
that are deciduous; coste above and margins very characteristically villous by 
long, soft hairs. Veins very close and numerous. Sori exindusiate. 
Glaphyropteris is probably confined to tropical America. I do not know any 
Old-World's species which can safely be referred hereto. The Himalayan D. eru- 
bescens (Wall) C. Chr. is similar in habit but otherwise quite different. 
Key. 
1. Lamina with 3—4 pairs of small, tuberculiform, abortive pinnz along 
the stipe. Coste above antrorsely setose, beneath cinereo-tomentose 
by sessile, branched hairs. Veins 15—20-jugate, not very close. 
2. Under surface not glandular. Indusium present, but rarely seen. 
3. Sori medial or inframedial. Segments broadly obtuse, mem- 
branous, shortly and rigidly setose above 171. D. Canadasii (Sod.) C. Chr. 
3. Sorisupramedial. Segments acute, coriaceous, the upperside (coste 
and veins excepted) glabrous ......... 172. D. macradenia (Sod.) C. Chr. 
2. Under surface densely glandular One ee 173. D. Thomsonii (Jenm.) C. Chr. 
1. Lamina without auriculiform and glanduliform, abortive pinne. Coste 
above and margins villous by long, soft hairs; rachis and cost beneath 
glabrous or more or less downy by simple hairs Veins very close. 
2. Veins about 16-jugate. No aérophore at the base of the costules 
beneathyeWextunesthin herbaceous b LS 174. D. mapiriensis Ros. 
2. Veins 25—60-jugate. Distinet aérophore at the base of the costules. 
Texture firm to coriaceous. 
3. Veins 25—40-jugate. Under surface densely glandular. Sori 
inframediallNe e e or om ok nic REPE 175. D. decussata (L.) Urb. 
3. Veins 45—60-jugate. Under surface apparently eglandulose. 
Sorisupranmedial err we cms 176. D. polyphlebia n. sp. 
171. Dryopteris Canadasii (Sod.) C. Chr.; Revision nr. 68 fig. 44. 
Area: Ecuador. — Soprro describes the species as exindusiate; I have failed 
to find indusia in authentic specimens. 
172. Dryopteris macradenia (Sod.) C. Chr.; Revision nr. 79. 
Area: Ecuador, Sopino (authentic specimens in C and Kew!) 
Closely related to the preceding species, but the lamina coriaceous, the seg- 
ments acute and the sori supramedial. Basal segments much reduced. 
