- 291 - 



serratus. Costulæ conspicuæ, prominulæ, venæ utrinque elevatæ. Maculae 

 costales angustæ ; ceteræ 5 — 6 seriatæ — frequenter 4 in serie — fere 

 isodiametricæ, subæquales, 5 — 6 gonæ, rarissime appendice breve instructæ. 

 Venulæ exteriores plerumque liberæ, apicibus non incrassatis niarginem 

 vix attingentes. 



A pretty and distinct species, the largest of the group. The descrip- 

 tion above is drawn up after the original specimen in Herb. Berol. ; and 

 another specimen from the same locality is exactly alike, but this form 

 is, I think, not the typical one of the species, being rather a local, luxu- 

 riant form. A little frond in Herb. Berol. from Ecuador represents per- 

 haps the normal form. Its pinnæ are equal-sided with a cuneate base, 

 the lower stalked with a stalk 1 ' '" long ; costa in the lower part beneath 

 is furnished with a few minute, ovate subulate scales. — The basal parts 

 of the stems and the rhizome are not known to me; Mettenius describes 

 the latter as being scandent. To this species I do not hesitate to refer 

 as variety a plant from Costa Rica, comm. Dr. Christ. 



var. costaricensis (Christ). — Fig. 4 b. 



Syn. Gijmnopteris costaricensis Christ, Bull. Herh. Boiss. II. 4:965. 1904. 



Petiolus folii sterilis SV-/''""' longus, stramineus, strictus, basi squamis 

 10 — 12^*^™ longis, linearibus, rufo-brunneis , flaccidis, integerrimis dense 

 vestitus, sursum nudus. Lamina ovato-elongata , 6'**="' longa. Pinnæ 

 12 jugæ, distantes (4 — 5°™), subæquilaterales, late-lanceolatæ, 16 — 18""' 

 longæ, 3 — SVo*^™ latæ, acuminalæ, inferiores petiolo V2 — ^/é*^"^ longo petio- 

 latæ, basi inæqnaliter euneatæ, firmæ, pallide virides, subtus ad costam 

 squamis nonnullis minutis, ovato-subulatis, subintegris instructæ. Margo 

 pinnarum a basi ad apicem levissime serratus. 



This variety differs from the type mainly by its pinnæ being nearly 

 entire, not deeply crenated, and by its paler colour and firmer texture. 

 As to the venation it exactly agrees with the type. The rhizome is 

 after Christ creeping and sparely clothed with scales like those of the stem 

 below. The fertile frond resembles closely that of the type; its pinnæ 

 are longer (about 8 — 10'='") than those of the other species of the group. 



Specimens examined : 



Columbia: Muzo , 7—900"': Lindig n. 258 (type specimen HB); 

 Stübel, Filices n. 560 (HB); 



Ecuador: Zwischen Bafios u. Pintuc im Pastaza Thai, Stübel, 

 Fihces n. 929 (HB). 



var. costaricensis. Costa Rica sine loco. Werckle & Brune 1903 

 (Herb. H. Christ, Bale). 



Fig. 4«. Pinna of the tyi)e specimen, Vi nat. size. — ib. Ditto of the 

 var. costarice7isis. nat size. 



19* 



