HYMENOPHYLL UM. 



305 



H. barbatum — bar-ba'-tum (bearded), Baker. 



This little species, native of Tsus-Sima, near Japan, somewhat resembles 

 H. tunbridgense in general appearance, but it is a stouter plant, with the 

 rachis (stalk of the leafy portion) winged throughout, broader segments, 

 and sori (spore masses) terminal on the segments of the upper leaflets. The 

 sori are provided with a broadly -oblong involucre (covering), the valves of 

 which are divided more than half-way down, and dee|)ly spiny or toothed. 

 — Hooker, Synopsis Filicum, p. 68. 



H. biYalve — biv-aF-ve (two-valved), Sioartz. 



A species of medium dimensions, native of New Zealand, with fronds 

 somewhat broadly triangular. Sin. to Sin. long, 2in. to Sin. broad, three 

 times divided nearly to the midrib, and produced from naked rhizomes 

 (prostrate stems) of a particularly wiry nature. While the main rachis 

 (principal stalk of the leafy portion) is only slightly winged above, 

 the secondary ones are winged throughout. The linear, finely-toothed 

 ultimate segments bear numerous spore masses — often six to eight — which are 

 provided with an entire, nearly globose involucre (covering), divided almost 

 down to the base. — Hooker^ Species Filicum, i., p. 98, t. 35. Nicholson, 

 Dictionary of Gardening, i., p. 165. 



H. Blumeanum — Blu-me-a'-num (Blume's). A variety of H. polyanthos. 



H. borneense — bor-ne-en'-se (from Borneo), Hooker, 



This is a very distinct species, of particularly dwarf habit, native of the 

 hills near Sarawak, where it grows at an altitude of 2700ft. Its little 

 fronds, square or fan-shaped in general outline, ^in. to fin. long, and 

 Jin. broad, are borne on very slender stalks lin. long, and cleft like a fan 

 nearly to the base, the narrow divisions being repeatedly branched ; the 

 upper surface is hairy, and the margin is ciliated with reddish hairs. The 

 sori (spore masses) are terminal, solitary, and nearly round ; their wedge- 

 shaped base is sunk in the frond, and their valves are hairy. — Hooker, 

 Synopsis Filicum, p. 62. 



H. Boryanum — Bo-ry-a'-num (Bory's). A synonym of H. ciliatum. 



H. breYifrons — brev'-if-rons (short-fronded). Synonymous with H. ahruptum. 



VOL. 11. X 



