106 JAMESONIA. 



bellate veins distant from the margin at length confluent, 

 mixed with a dense mass of aureo-nitent or ferruginous long 

 fine woolly hairs ; similar hairs in a young state clothe the 

 whole of the young fronds and the still undeveloped apex of 

 the older ones. Involucre none, but the margins of the pinnee 

 are singularly I'eflexed and more or less membranous at the 

 edge which thus becomes involucriform, nearly plane in age. 

 — Fern of Peru, the Andes, Ecuador, and New Granada, grow- 

 ing, according to Jameson, in marshy places among Sphagnum, 

 and at elevations of from 8-14,000 feet. Caudex creeping, 

 tortuous, very much branched, black, with black wiry roots. 

 Stipites black, fiexuose, glabrous, short or elongated. Fronds 

 linear, simply pinnate, varying exceedingly in length from 6 

 inches to 2 feet. Pinnae very crowded. 



Fee and Mettenius dwell much on the " indefinite evolution " of the frond. It 

 certainly does appear of slow growth, for in the majorityof specimens we find the 

 apex scorpioid (unexpanded) and densely clothed with silky wool which gradually 

 falls off in age. Moore observes truly that it is a well-marked genus respecting the 

 majority of the species referred to it. I am compelled, however, to remove from 

 it the compound-fronded species, /. Jmpidula, Kze., which is Gymnogramme Ca- 

 racasana, K\., J. paleacea, Kze., which \% Polypodium ( Phegopteris) jjycnolepis, 

 and J. bipinnata, Fee, which is Gymnogramme elongata, Hook, and Grev. /. 

 adnata, Kze., is properly referred to Polypod. (PhegopterisJ moniliforme, Cav., 

 and I fear the other supposed species of authors must merge into the original /. 

 imbricata, Hook, and Grev. 



1. J. imbricata. Hook, and Grev. — a, gracilis ; slender, 

 frond narrow linear, stipes usually short filiform. Hook. Ic. 

 Fil. 178 (J. pulchella on the plate and in the text, but cor- 

 rected in the Addendum). — Pteris imbricata, Cav. [fide Sw.) 

 Sw. Sijn. Fil. p. 102. JVilld. Sp. PI. v. p. 364. Cheilanthes, 

 Desv. AUosorus, Pr. Pt. orbiculata, Lam. Jamesonia sca- 

 laris, Kze. in Bot. Zeit. 1844.;). 738, and in Schk. Fil. \.p. 167. 

 t. 1\.f. 1. — Var. 13, canescens ; very densely and most beau- 

 tifully sericeo-lanose, the hair often of a rich purple-yellow 

 colour concealing the pinnae. J. canescens, Kze. in Schk. 

 Fil. Suppl. ii. p. 81. t. 133./. 2. Gymnogramme, Kl. J. ro- 

 tundifolia. Fee, 7 me Mem. Foug. Nouv. p. 41. /. 10. /. 3. J. 

 nivea, J. robusta, and J. Bogotensis, Krst. Fl. Columbia, ii. 



pinnatifid apex is petiolate, veinlets uniform, reticulated areoles with no free 

 veinlets, costal areoles the largest, sori with a small peltate (?) involucre (very 

 sparse on my only two specimens) compital small. — Polypodium (Dictyopteris) 

 membranaceum, Hook, in Blakiston, ' Five Months on the Yang-tsze,' App. j). 365. 

 Hab. Philippine Islands, Cuming (numbered inaccurately). Province of 

 Szcliuan. W. China, Col. Sarel. — The scales of the caudex and base of the stipes 

 are peculiar, and the fronds are different from any other of the Aspidioid group. 



