2 I'LATYZOMA. — GLEICHRNIA. 



1. Platyzoma. Br. 



Sort of very few (2 — 3) sessile capsules (mixed with a pul- 

 verulent substance, Br.), soon deciduous, placed at the apex 

 of the simple veinlets, and concealed by the singularly revo- 

 lute margins of the pinna;. — Rootstock creeping. Fronds 

 coispUose, glabrous, erect, unbranched, linear, pmnati/id. 

 Pinnae oi^al, sessile, vert/ concave. Hook. Gen. Fil. tab. 41. C. 



1. V.microphyllum. Br. Prodr. Nov. Hol.p.160. Guillem. 

 Ic. PI. Amir. Rar. t. 13. Presl. tab. 1./. 4. 



Hah. Tropical New Holland, Mr. Brown. Madagascar? firyVr.— This 

 genus might perhaps, without violence to nature, he united to the following. 



2. Gleichenia. Br. 



Gleicheiiia, Calymella and Mertensia, Presl. Gleichenia and Mer- 

 tensia, J. Sm. and most authors. Platyzouiatis sp., Desv. Dicranop- 

 teris, Bernh. Sticherus, Presl. 



Sort of few (2 — 4) sessile, superficial or immersed, deciduous 

 capsules, situated on a lower exterior veinlet. — Tropical or 

 Australasian Ferns, procumbent, dichotomously branched: the 

 branches simple or pinnate ; pinna pinnatijid, the segments 

 small, ovate or orbicular, or larger, oblong and linear, plane 

 or concave, the margin sometimes singularly revolute, gla- 

 brous or chaffy, \eins pimiate, often immersed and obsolete, 

 simple or forked. Hook. Gen. Fil. tab. 41 , A. B. ; and tab. 39. 

 Subgen. I. EuGLEicHENiA. Sori at the apex of a veinlet, capsules 

 often sunk. iSegments of the tdtimate branches ovate or orbi- 

 cular. .Australasian or mountains of Java. Gleichenia and 

 Calymella, Presl. 



1. G. Spelunca, Br.; glabrous, fronds simple or forked and 

 dichotomous pinnate, pinna? pinnatifid the segments semio- 

 vate plane membranaceous glaucous beneath. (Tab. I. f. A.) 

 — Br. Prodr. p. 160, {not of Guilleniin). 



Hah. Port Jactson, N. S. Wales, Brown: Sicb. Syn. Fil. n. 87: and 

 Tasmania, R. Gunn, Esq., n. 34. — My specimens of this plant vary ex- 

 tremely in size and in the greater or less degree of ramification ; yet they 

 seem all to agree with Mr. Brown's essential character. 



2. G. rupestris, Br.; glabrous, fronds forked or dichotomous, 

 branches pinnate, pinna? pinnatifid the segments rounded or 

 obtusely subquadrangular coriaceous the mar-gins thickened re- 

 curved glaucous beneath, capsules 3 — 4 exserted. (Tab. 1. B.) 



Hab. Port Jackson, N. S. Wales, Broicn, R. Cunningham. — My only 

 specimen of this has larger more obtuse segments of the pinnae, and is of a 

 much more coriaceous character, than the preceding. 



3. G. alpina, Br.; fi-onds dichotomous proliferous, branches 

 pinnate, pinnae pinnatifid, segments orbicular fornicate be- 



