12 C.LKICHENIA. 



capsules 8 — 10. — M. pectinala, Willd. — Langsd. et Fisch. 

 If. Fit. f. 30. M. dichotoma, Sw. {non Willd.) M. Brasili- 

 ana, Dcsr. M. canescens, Kaulf. M. emarginata, Raddi, 

 Fil. Jhasil, 1. 6. M. Ilcnnanni, Hook.et Grev. Ic. Fil. t. 14 

 {(wciinling the sytwntjins). — 13. pinna) beneath clothed with 

 ferruginous cobwebby down. 



Hub. Frequent throughout Brazil and in S. America and the West In- 

 dies generally. Guatemala, 5/«'wn<"r. Mexico, Galentti — /3. Bahia, (//erft, 

 iwslr.) — I greatly erred in referring this to the G. Hermanni of Mr. Browu 

 {G. dichotoma, Willd. and this work), from which it is at once distinguished 

 by the absence of the pair of pinnules at the base of the forkings of the stipes. 

 The character of the species is indeed very peculiar, and I do not know any 

 with which it is likely to be confounded. It is, as other species are, liable 

 to vary in the size of the pinnre and in their relative length and breadth, 

 and slightly in pubescence. The whole plant is so well marked that the spe- 

 cies might with propriety form a section of itself: the following however 

 may be considered a more simple form of the same section. 



3C. G. nervosa, Kaulf.; caudex creeping, stipes terete short 

 simple bearing a frond consisting of one pair of broadly ovate 

 acute pectinato-pinnatifid pinnte, segments long linear nar- 

 row coriaceous acute nearly horizontal glossy and marked 

 with prominent veins above, the margin revolute, glaucous be- 

 neath and densely clothed with rusty touientum among which 

 the capsules 3 — 4 in a sorus are imbedded. (Tab. V. A.) 



Hab. Brazil. St. Catherine's, Chamisso, Sclloiv, Capt. Deecheij. — A most 

 distinct and well marked and beautiful si)ecies, and as far as I know only 

 hitherto discovered at St. Catherine's of Brazil. 



§ IV. Stipes repeatedly di- or trichotomous, the ultimate branches bearing 

 simply forked pinna : a pair of jnnnce also arise from the base of the 

 di- or trichotomy of the branches {not of the frond). Segments never 

 decurrent. 



37. G. [Mertensia) dichotoma, Willd.; stipes rounded, ul- 

 timate branches with a i)air of ]nnnae and a pair also at the 

 base of the di-trichotomy, pinna; lanceolate acuminate i)in- 

 natifid, segments linear obtuse or emarginate glaucous be- 

 neath glabrous or nearly so, lower external ones generally the 

 largest often again pinnatifid, capsules 10 — 12. — Sdikahr, 

 Fil.t. 148 {e.xcelleiit). Mart. Crypt. Brazil, p. 111. Langsd. 

 et Fisch. Ic. Fil. t. 29, [excl. sijn. of Swartz). Sieher, Syn. 

 Fil. n. 20. Mertensia discolor, Schrad. — Mart. M. Sieberi, 

 Presl. Polypodium dichotomum, Thunh. Jap. f. 37. G. la- 

 nigera, Dott, {according to J. Stn.) Sticherus laniger, Presl. 

 G. Hermanni, Br. Prodr. />. 161 {not of Hook, et Grev.) Mer- 

 tensia Hookeri, J. Stn. — RnmpJi. Amhoin. 0, p. 38. M. flex- 

 uosa, Mart. Crypt. Brazil, p. 108, /. 00, /! 1. M. pusilla, 

 Mart. Crypt. Brazil, p. Ill, /. 60^/! 2. G. rigida, J. Sm. 



