CYATHEA. 



85 



are naked, the upper one being dark green and the lower slightly glaucous. 

 The sori (spore masses), which are unusually large and fill up the fertile 

 pinnules, except the very tip, are covered by parchment-like, smooth involucres, 

 which eventually burst irregularly. — Hooher, Synopsis Filicum, p. 454. 



C. Lindeniana — Lin-den-i-a'-na (Linden's). A synonym of C. mexicana. 



C. Lindsayana — Lind-say-a'-na (from Mount Lindsay), Hooker. 



This greenhouse species, of large dimensions, with smooth trunk and 

 stipites (frond -stalks), is the first true Cyathea that was found in Australia, 

 in the north-east part of which it occurs on Mount Lindsay. Its ample fronds 

 are of a glabrous (smooth) nature, except on the midrib, which is somewhat 

 hairy and shows many scattered, small, bubble-hke scales. The leaflets are 

 about 2ft. long and pinnate (cut to the midrib) nearly to their extremity ; 

 the leafits thus formed. Sin. to 4in. long, oblong, and pointed, are deeply 

 pinnatifid (cut nearly to the midrib), their lobes being nearly sickle-shaped 

 and conspicuously toothed on the margin. The sori (spore masses), disposed 

 at the forking of the veins on the lower half of the lobes, are covered by 

 roundish, brown involucres of a firm, parchment-Hke texture, which open with 

 a circular, rather small, and jagged mouth. — Hooker, Synopsis Filicum, p. 2b. 



C. Lobbiana — Lob-bi-a'-na (Lobb's), Hooker. 



A stove species, native of Sarawak, Borneo, in general aspect resembling 

 Alsojjhila alternans, from which, however, it is easily distinguished by its 

 roundish sori (spore masses), rarely produced in the axils of the veins, being- 

 disposed in two rows on each side of the midvein of each segment, and 

 covered by involucres of a very thin texture, at first investing the whole sorus, 

 but eventually breaking down irregularly. — Hooker, Synopsis Filicum, p. 24. 



C. Manniana — Man-ni-a'-na (Mann's), Hooker. 



This greenhouse species, native of Fernando Po and the Cameroon 

 Mountains, where it grows at elevations of 3000ft. to 4000ft,, is quite distinct 

 from any other known Tropical African Cyathea. Its trunk, which attains 

 30ft. in height, produces ample fronds of a somewhat leathery texture, smooth, 

 and tripinnate (three times divided to the midrib). The leaflets, 2ft. long and 

 about Sin. broad, are divided into narrow-oblong and somewhat sickle- shaped. 



