LINDS.EA. 209 



•20. L. pumila, Kl. ; small tnrted, caudex somewhat creep- 

 ing, IVonds lanceolate pinnate submembranaceoiis, ])innae 

 erecto-patent rather distant obliquely cuncatc with obtuse 

 angles and few veins, sorus marginal continuous but not oc- 

 cupying the entire breadth of the pinnic, stipes brown and 

 as well as the straw-coloured rachis tetragonal. — Klotzschy 

 ill Linncea, 184-1, p. 545. 



Hal). British Guiana, R. Schomhurgk. — A small, pale green, delicate 

 species, scarcely more ;haii four inches high, including the stipes. It seems 

 to be a distinct species, hearing perfect I'ructificatiou, but it is, perhaps, 

 most nearly allied to the unbranched state of L. stricta, though of a far more 

 delicate texture and with differently shaped pinnjE, for all arc obliquely 

 cuneate. 



21. L. dub/'a, Spr. ; caudex creeping slendei, stipes rather 

 long dark brown at the base, fronds ovate-oblong pinnate, 

 pinna? patent linear-lanceolate acuminate, slightly falcato-in- 

 curved, obliquely cuneated at the base, lobato-serrate on both 

 margins towards the rather obtuse a]icx, main vein or costa 

 excentric but distant from the inferior margin, becoming cen- 

 tral towards the apex, and there only, throwing out veins on 

 both sides, sorus marginal on the upper edge and continuous, 

 except at the apex, where it is interrupted on the lobes or 

 teeth, appearing occasionally on both margins. (Tab. 

 LXIV. C.) — Spreng. Syst. Veget. iv. p. 79. L. tenera, Kaulf. 

 En. Fil.p. 219. 



Hab. French Guiana, Richard ; British Guiana, Schomburf/fc. — A most 

 distinct and well-mi«-ked species, evidently tending to unite the group or 

 genus Isoloma (J. Sm.) with true Lindsaa ; for the upper portion of the 

 principal vein is central, the rest excentiic; and the sori are produced only 

 on the upper margin in the latter case, on both margins, occasionally, in 

 the former. 



22. L. acutifoUa, Desv. ; " fronds pectinato-pinnate, pinnae 

 on both sides pulverulento-tomentosc (tomentum deciduous) 

 lanceolate entire acute contracted below truncate at the base 

 and above auriculate, sorus continuous, rachis tonientose-" — 

 Desv. Mem. Soc. Linn. ii. jj. 312. 



Hab. Mauritius, {Desvaux). — " Pinnae an inch and a half long." I have 

 seen no Lindsaa corresponding with this from the Mauritius. 

 W Costa central. Sori on both marf/ins of the eq\ial pimia. Isoloma, 

 J. Sm. Sp." 23—25. 



23. L. Walkerce, Hook ; caudex tall creeping clothed 

 with scale-like hair, sti]5es very long and as well as the rachis 

 dark purple glossy, fronds broad-lanceolate pinnate, pinnae 

 coriaceous subopposite remote lanceolate or linear-lanceolate 



