Lindsaya. | FILICES. 43 
A, C. Field. Sovuru Istasp: Nelson—Massacre Bay, Lyall; Torrent Bay, Kingsley. 
Westland—Near Hokitika, W. H. Tipler; Giles Creek, near Westport; Millerton ; 
near Charleston, W. Townson! Otago—Sounds of the West Coast, Buchanan. \ 
A very beautiful and distinct species, usually found on dripping rocks by water- 
falls, or on the mossy banks of streams. 
16. ATHYRIUM Roth. 
Rhizome short, stout, erect or ascending, rarely creeping, chaffy or 
scaly at the top. Stipes few or many, tufted at the top of the rhizome. 
Fronds 2-3-pinnatifid, usually herbaceous in texture. Veins free. Sori 
placed along the veins, short, oblong, thick and swollen, curved or 
inflexed, rarely quite straight. Indusium inflated, splitting irregularly ; 
sometimes two indusia are placed side by side on opposite sides of the 
vein, opening outwards as in Daplaziwm. Sporangia stalked, girt by an 
incomplete vertical ring. 
A genus of 60 or 70 species, intermediate in character between the typical Asplenia 
and Diplazium. The genus has an almost world-wide range. 
1. A. umbrosum Pres! Tent. Pterid. (1836) 98.—Rhizome short, stout. 
Stipes 1-2 ft. long, stout, erect, scaly towards the base, smooth and naked 
above, brownish-green. Fronds variable in size, 1-4 ft. long without the 
- stipes, 91in. to 3 ft. broad, broadly ovate or deltoid, spreading, often droop- 
‘ ing towards the tip, pale-green, membranous, flaccid, 2—-3-pinnate ; rhachis 
slender, flexuous, naked, Primary pinnae rather distant, 6-18 in. long, 
ovate-lanceolate to oblong-ovate, acute or acuminate; secondary 1-2 in. 
_long, lanceolate, deeply pinnatifid or again pinnate. Ultimate segments 
~++in. long, oblong or oblong-lanceolate, acute, sessile and decurrent, 
) usually deeply inciso-crenate; veins pinnate, simple or forked. Sori 
copious, usually about 5-6 to each pinnule, short, oblong. Indusium large, 
tumid, membranous.—Asplenium umbrosum J. Smith in Hook. Lond. Journ. 
Bot. iv (1841) 174; Hook. and Bak. Syn. Ful. (1878) 229; Benth. Fl. Austral. 
vil (1878) 749; Thoms. N.Z. Ferns (1882) 77; Field N.Z. Ferns (1890) 
125, t. 5, f. 2; Cheesem. Man. N.Z. Fl. (1906) 995. <A. australe Brack. 
U.S, Expl. Exped. xvi (1854) 173; Hook. Sp. Pil. ii (1860) 232; Hook. f. 
Handb. N.Z. Fl. (1864) 374. A. Brownii J. Smith ex Hook. f. Fl. Nov. 
Zel. ii (1855) 36; Hook. Ic. Plant. t. 978. Allantodja australe R. Br. 
Prodr. (1810) 149. A. tenera R. Br. lc. ; A. Cunn. Precur. (1836) n. 186 ; 
Raoul Choix (1846) 37. Polypodium umbrosum Ait. Hort. Kew, iii (1789) 
466. 
Nortx# Istanp: Not uncommon from the Bay of Islands to the East Cape and 
Taranaki, from thence somewhat rare and local to Cook Strait, usually on calcareous 
or alluvial soils. SourH Istanp: Nelson—T ravers ; near Foxhill, 7. F. C.; West 
Wanganui, Kingsley. Westland—Banks of Buller River, near Westport, W. Townson ! 
Also found in Australia and Tasmania, the Malay Archipelago, India, tropical 
Africa to the Canary Islands, the Azores, and Maderia. 
17. DIPLAZIUM Swartz. 
Rhizome erect and sometimes arborescent, or slender and wide-creeping. 
Stipes not articulated to the rhizome. Fronds varying in size, 1-5 {t., 
1-3-pinnate ; texture herbaceous or rarely subcoriaceous. Veins forked or 
