20« i.w 



s. Coslæ beneath setose bv simple hairs. 



262. D. tetraijona (Sw.) Urban. 



5. Under surface with minute stellate hairs throughout, 



especially on costæ and coslules, but also on the leaf-tissue. 



6. Terminal pinna stalked, distinct. Pinnæ incised '/:i or 



deeper; as a rule the lowermost pair of veins only are 



anastomosing under a broad angle. 



263. Ü. megalodiis (Schkuhr) Urb. 

 6. Terminal pinnæ confluent with the upper lateral ones, 

 which are adnate to rachis. Pinnæ broadly serrulate 

 (lobes scarcely longer than broad). 2 — 3 pairs of al- 

 ternately united veins 264. Ü. leucophlebia iChrist) C. Chr. 



3. Microdicti/on. 3—10 pairs of meniscioid veins. Pinnæ entire 

 or crenate, seldom shallowly lobed, mostly more than 4 cm 

 broad. 

 4. Lamina beneath more os less soft-hairy. 



5. Veins 6 — 8-jugate, the 3 — 4 lower pairs meniscioid. Spo- 

 rangia when young setose 265. D. Poiteana (Bory) Urban. 



Ô. Veins 10— 12-jugate, 8 — 10 pairs meniscioid. Sporangia 

 glabrous. Lamina densely soft-hairy. 



267. D. Ghiesbreghlii fLind.) C. Chr. 

 4. Lamina glabrous. Meniscioid veins several. 



5. Pinnæ narrowed from llic middle to base, crenate or 



serrulate 266. Ü. meniscioides (Liebm.) C. Chr. 



;i. Base of pinnæ subcordate. Pinnæ entire . 268. D. ensifonnis n. sp. 

 2. Pinnæ with an acute or obtuse aërophore at the base beneath. 

 Stellate hairs none. Several pairs of veins connivent to a cartila- 

 gineous membrane below the sinus, the opposite pairs not anasto- 

 mosing, but two subsequent veins of the same side of the costule 

 generally united near the membrane; see D.glandulosa and D. Fend- 

 leri under § Steiropteris. 



1 Asterochlaena c. chr. 



Biolog. Arbejder tilegnede Eug. Warming 84. 1911. 

 206. Dryopteris Cumingiana (Kze.) O. Ktze. Rev. 2: 812, 1891 C. Chr. Ind. 260. 



Syn. Aspidium Cumingianam Kze. Farrnkr. 1: 17 tab. 9 fig. 2. 1840. 



Nephrodium Cumingiaiuim J. Sm. Hot. Voy. Heral 237 lab. 50. 1854. 



Type from Panama, leg. Cuming nr. 1123 (Kew! a small leaf only). 



Apparently a very distinct species, well figured on the plates quoted, still it 

 is possible thai it and the following species are forms of one species. D. Cumingi- 

 ana is less hairy, the lamina faintly crenate and 1—2 veins generally joint alter- 

 nately the excurrent branch from the united basal veins. It appears to be a rare 

 species, which is not found in the large recent collections from Panama. 



