15 



DIDYMOCHLjENEjE. 

 DIDYMOCHL.ENA. Desvaux fieri. Mag. v. 303 t. 7 jig. 6. 



(Monoclilaena, Gaudichaud ;— Hippodium, Gaudichaud ms. ; — Ceramium, Reinwardt ; — Tegularia, Reimmrdt ; — Hystero- 

 carpus, Langsdorff M.S. ; — Diplazii sp., Raddi. ; — Aspidii sp., Au:t. ; — Asplenii sp., Auct. ; — Adianti sp., And.) 

 m 



Gen. char. Sori indusiate, elliptic-oblong ; the receptacles oblong, dorsal at the apex of the venules. Indusium of the same 

 form, obtuse at both ends, attached longitudinally along its centre to a crest formed elevation of the receptacle, free at the margins. Veins 

 flabeliately -forked ; venules direct, free ; the anterior one in each fascicle soriferous, the sterile ones clavate at the apex. 



Fronds bi-pinnate, coriaceous ; pinnules dimidiate or sub-dimidiate, obtuse, articulated, sub-ecostate. Rhizome arborescent. 

 Handsome tree ferns, with peculiar fructifications. (Moore.) 



A genus consisting of a single species. 



DlDYMOCHLiENA LUNULATA (Desv.) Hooh. Sp. Fil. iv. 5;— Desv.inMein. Soc. Linn. vi. p. 282 ;—Hooh Gard. Ferns, 

 pi. 17 ;—. D. sinuosa, Desv. I. c. p. 28;— Mart Ic. PL Crypt Bras. p. 95 t 28 and 29/. 1 ;—Hook Gen. Fil. t 8 ;— D. squamata, Desv. 

 Journ. Bot. Appl. I p. 5 t. 2 ■/. 4 ;— D. truncatula, J. Sm. Gen. of Ferns p. 84 ;— D. dimidiata, Kunze. in Linncea, xviii. p. 122 ;~ 

 Schh. Fil. Suppl. p. 200 t 84 ]-*Pappe. and Raws. Syn. Fil. Afr. p. 15 ;— Aspidium truncatulum, Sw. Syn. Fil. pp. 52 and 252. 

 Willd. Sp. PI. v. p. 256 ;— Aspid. squamatum, Willd. Sp). PI. v. 250 ;— Monochlaana sinuosa, Gaudich. in Freyc. Voy. Bot p. 340 t 12 

 /. 3 ;— Diplazium pulcherrimum, Raddi Fit Bras. p. 42 t 59 ;— Lonchitis ramosa, &c, Plum. Fil. p. 43 t 56. 



The specimen figured is from Birmah (Rev. C. S. P. Parish.) 



Hab. Tropical America, Brazil, 1ST. Granada, Andes of Ecuador and Peru, W, Indian Islands, Java, Luzom Birmah, S, Africa, 

 Natal, Madagascar, Part of Fernando-Po-Fiji Islands. 



PLATE No, XV, 



