Cheilanthes.] FILICES. 967 
or less modified tooth or lobule of the frond, reflexed over the sorus 
and in the young state more or less concealing it. Sporangia 
stalked, bursting transversely, girt by an incomplete vertical ring. 
A genus of about 60 species, found in most tropical and temperate 
regions. It is only separated from Nothochlena by the modified tooth or 
lobule of the frond reflexed over the sorus, a character which is sometimes 
so obscure that it is difficult to separate the two genera. The two New 
Zealand species are both widely distributed. 
Fronds broad, deltoid .. se Me 56 .. 1. C. tenuifolia. 
Fronds linear-oblong or linear .. re : .. 2. C. Sieberi. 
1. C. tenuifolia, Swartz, Syn. Fil. 129, 332.—Rhizome very 
short, suberect, clothed with silky scales. Stipes 3-9in. long, 
tufted, wiry, erect, dark red-brown, smooth and polished, glabrous 
or slightly scaly when young. Fronds 4—10in. long, 2-4 in. broad, 
deltoid or ovate-deltoid, submembranous, yellowish-green, 3-pin- 
natifid; rhachis smooth, polished, glabrous or nearly so. Primary 
pinne 6-12 on each side, opposite or nearly so, ascending or 
spreading; the lowest pair sometimes 24in. long, deltoid; the 
upper smaller and narrower. Pinnules oblong or elliptic-oblong, 
deeply pinnatifid; ultimate segments entire or irregularly lobed 
or crenate; surfaces glabrous. Sori on the margins of the 
lobes, generally confluent and continuous all round the edge of 
the pinnules. Indusium narrow, elongated, usually crenate or 
denticulated, often transversely wrinkled.—Hook. Sp. Fil. 1. 82, t. 
87c; Hook. and Bak. Syn. Fil. 188; Benth. Fl. Austral. vii. 726 ; 
Kirk in Trans. N.Z. Inst. vi. (1874) 248; Thoms. N.Z. Ferns, 57 ; 
Field, N.Z. Ferns, 86, +. 21,i.2, 3. C. Kirkii, Armstr. in Trans. N.Z. 
Inst. xiii. (1881) 360 (not of Hook.). C. venosa, Col. in Trans. 
N.Z. Inst. xxv. (1893) 321. Pteris alpina, Field, N.Z. Ferns, 97, t. 
28, f. 2. 
NortH Iscranp: Auckland — Mount Maunganui, near Tauranga, Mrs. 
Hetley! Uawke’s Bay—Mohaka, HE. Craig! Petane, A. Hamilton! in various 
localities, Colenso! Wellington—Near Wanganui, H. C. Field. SourH IsLanD: 
Canterbury — Banks Peninsula, Lyall, Armstrong, Kirk ! Otago—Mountains 
near Lake Wakatipu, Buchanan; Lake Wanaka, Mrs. Mason! Sea-level to 
2500 ft. 
Extends northwards through Australia to the Malay Archipelago, India, and 
China. The typical state is easily distinguished from the following species by 
the broad deltoid frond, but intermediates are occasionally seen. 
2. ©. Sieberi, Kunze in Pl. Preiss. ii. 112.—Rhizome short, 
stout, creeping, clothed with chestnut-brown scales. Stipes 3-9 in. 
long, densely tufted, erect, wiry, dark chestnut-brown, polished, 
glabrous or with a few fibrillose scales. Fronds 3—9in. long, 
3_j4in. broad, linear-oblong or linear, erect, rigid, glabrous, 2—3- 
pinnatifid ; rhachis smooth, glossy. Primary pinne 3-15 opposite 
pairs, ascending, the lower rather remote, 4—lin. long, ovate- 
deltoid. Pinnules oblong, deeply pinnatitid; segments entire or 
