24 4. CVATIIEA. 



fragile membrane, at first covering the whole sorus, breaking down into irregular 

 lobes. 

 Hab. Sarawak, Borneo, Thos, Lobb, n. 166. Apparently a very distinct species, which 



1 only possess from the above locality. 



40. C. assimilis, Hk. ; caud. 20ft. high ; st. bright chestnut, slightly muricated 

 and fringed on one side with long, ferruginous scales ; fr. ample, coriaceo-mem- 

 branaceous, bi-tripinnate ; prim, pinnae nearly 1 ft. 1., 3-4 in. w., broad-oblong 

 acuminate, petiolate, glabrous ; pinnl. and prim, sup.pinnce deeply, almost to the 

 costa, pinnatifid (lowest inf. lobe always the smallest), from 4-5 lines 1., oblong, 

 very obtuse, subfalcate, coarsely toothed ; sup. rachis and underside of the costce 

 subsquamose ; veins simple or once or twice forked ; sori dorsal or, in the axis of 

 the fork, subglobose ; invol. at first entire, very thin and filmy, breaking down 

 into very irregular lobes. 



Hab. Hills, Sarawak, Borneo, T. JLobb, n. 168. This has much the general aspect 

 of Alsophila squamulata (Gymnosphsera,^.), but is more compound, and has the true 

 involucre of a Cyathea. 



41. C. Lobbiana, Hk. ; Jr. ample, subcoriaceous, pinnate, pinnatifid at the 

 acuminated apex, everywhere smooth, glabrous, and destitute of scales ; pinnce 

 petiolate ; inferior ones (the largest of our specimens) 9-10 in. 1., 2-2^ in. w., 

 oblong, deeply acuminate nearly to the rachis, pinnatifid, or pinnate only at the 

 very base ; lowest inferior pinnl. always the smallest ; lobes or pinnl. horizontal, 

 spreading, obtuse, obscurely serrated ; super, pinnce gradually smaller, obtuse, 

 sessile ; veins distinct, approximate, simple or forked ; sori globose, dorsal, or 

 rarely in the axil of the veins, in 2 rows, one on each side the costule ; invol. a 

 very thin, delicate membrane, at first investing the whole sorus, at length deli- 

 quescent, as it were, at the summit, and breaking down irregularly. 



Hab. Sarawak, Borneo, T. Lobb. My largest pinnae have a very close affinity with 

 those of Alsophila alternans; but here is a most distinct though almost filmy involucre. 



42. C. liymenodes, Mett. ; glabrous ; prim, rachis dark purple-brown, subas- 

 perous ; pinnl. 3 in. 1., oblong, acuminate, sessile, subcoriaceous, dark lurid green 

 on both sides ; costce beneath minutely and sparsely scaly ; lobes very compact, 

 so as to close the sinus, oblong-falcate, very obtuse, obscurely serrate ; sori at 

 the base of the lobes, few, close to the costule ; " invol. membranaceous, fragile, 

 soon breaking down and falling away." Mett. in Miq. Ann. Mus. Bot. L. Bat. 

 p. 57. 



Hab. Sumatra, KortliaU. My authentic specimen has the sori far advanced and 

 imperfect. May it not rather be an Alsophila ? 



43. C. orientalis, Moore (name only) ; rachises scarcely punctato-muricate ; fr. 

 ample, coriaceous, black-green, paler beneath, glabrous, bi-tripinnate ; prim. pinnce 



2 ft. 1. ; pinnl. 3-4 in. 1., 6-7 lines w., sessile, oblong-lanceolate, suddenly caudato- 

 acuminate (acumen serrated), deeply near to the costa pinnatifid ; costce beneath 

 ferrugineo-furfuraceous ; lobes linear-oblong, subfalcate, the margin serrated and 

 recurved ; sori copious, close to the costule which they quite conceal ; invol. dark- 

 brown, firm-membranaceous, persistent, cupshaped, subglobose, rich chestnut- 

 brown, the mouth a little contracted, perfectly orbicular and even at the edge. 

 Mett. in Miq. Ann. Bot. L. Bat. l.p. 38. C. arborea /3 pallida, Hassk. 



Hab. Java, Zippel, Zollwger, De Vriese, n. 98, 118, 130. It is no wonder that Hasskarl 

 was disposed to consider this a var. of C. arborea, of the W. Indies : the involucre forms 

 an equally perfect cup, which seems to persist in that (state without ever becoming 

 fragmentary. 



44. C. arachnoidea, Hk. ; all the rachises dark-coloured and opaque, muricated 

 with short, black, sharp spines, and clothed with rusty tomentuin ; fr. tripinnate, 

 firm-coriaceous, glabrous above, cobwebby beneath ; second, pinnce 4-4^ in. 1., 

 in. w., oblong, pinnate, pinnatifid only near the narrow acuminated apex ; pinnL 



