hy the texture and one-sidedness o f their segments. One group nos naoet.
segments, but still without any distinct midrib, whilst a few species have
segments, and approach in habit Pteris asid Schizoloma. The '
in fo u r species out o f sixty. Tab. I I . f. 21.
§ Euadiantum. Veins not '.t Sp. 1-57.
* F rond simple.—Sp. 1-2.
1. A. reniforme, L. ; st. tufted, polished, chesnut-hrown, 4-G in I • fr or
bicular-reniform, in. across, with usually a broad open sinuè;’ teriure
subcoriaceous; son all round the edge, lJ -3 lin. hr.—I lk . Sp. 2. p. 2 .t. 71. A.
E ll. Exot. t. 8.—¡3, A . asapifoUum, Willd. ; st. stronger, 6-12 in I ■ f r 2 4
m br., thicker in texture, with a deep narrow sinus, the basal lohes rometiraea
even overlapping— H k . Sp. 2. p . 2. t. 71. B. Fil. Exot. t. 11.
Hab. a, Madeira and Teneriffe ; ¡3, Mauritius and Bourbon.
nal^-ed, dark-hrown, polished, 4 -t
in. 1 . , / ) . 2 - 1 in. each way, suborbicular, slightly undulated, cuneate at the
base ; papyraceo-herbaceous ; veins not prominent ; sori few, placed in
crenations of the frond, J in. h r . -H k . Sp. 2. p . 237. ®. 3. 1.142. A. F il.E x o t. t. 61.
Hab. Moulmein, Malayan Peninsula ; discovered by the Eev. C. S. Parish.
** Radicantes-group.—Frond essentially simply pv.
and taking root at the apex. Sp. 3-6.
b o tif s ^ r fL e s n l e d ! n ft-''""’' “” P'‘Py?®®»-ifeAaceous, the rachis and
» » » ■
f r \ polished, blackish, 2-3 in I ■
I r 7 Ii’ ^ 7 ■’ pinnate with a terminal pinna, or prolone-ed and
looting at tlie ex trem ity ; pinnoe in 3 to 5 distant opposite pai -s * Fn hi > 3Tn
?FlW-d" r / " ’ l«b®d, sh o rtly ’stalked -''‘ S t o «
Fnoott cconnntYig uous, roundish or transversely oblong. ; “ »»■ fow r o L d th f o u te r ed“£ e’
' Except casually in A. macrophyUum, lucidum, and perhaps some other species.
Hab. Ramparts of Canton, Hance, 7542.—This much resembles A. tremulum; but the
petioles are shorter, and the lower pinnæ opposite and round, not dimidiate.
5. A. caudatum, Linn. ; St. 2-4 in. 1., tufted, wiry, spreading, dark chesnut-
brown, tomentose ; f r . 0-12 in. 1., simply pinnate, often elongated and rooting at
the extremity ; pinnce in. 1., J in. deep, dimidiate, nearly sessile, the lower
line straight and horizontal, the upper rounded, more or less cut, often deeply
and repeatedly, the point u sua lly blunt, the lower ones slightly stalked ; texture
coriaceous, the veins prominent, the rachis and both surfaces of the frond villose ;
sori roundish or transversely oblong on the edge of the lobes.—H k . Sp. 2. p . 18.
Ex. Fl, t. 104.—/3, A . rUzophorum, Swartz ; pinnm aud rachis nearly or quite
glabrous.—A. Edgeworthii, H k . Sp. 2. p . 14. t, 81. B.
Hab. Arabia Felix, Himalayas (3,000 ft.), and Hongkong, southward to Ceylon and
Java, Madagascar, Mauritius, Zambesi Land, Angola, banks of the Niger, and Cape
Verde Islands.—A. soholiferum, Wallich (Hk. Sp. v. 2. t. 74. A.), appears to be a form
of this with winged petioles and stipes. A similar form of A. lunulatum has been
gathered by Drs. Kirk and WelwiLsch in South Africa.
6. A. calcareum, G a rd .; st. slender, filiform, 2-3 in. 1., polished, blackish,
naked ; f r . 4-6 in. 1., or prolonged and rooting a t the extremity ; pinnce
in. br., J in. deep, varying in shape from a q uarter to nearly ha lf a circle, lobed
from the circumference towards the centre 2 or 3 times half the way down, and
the main lobes again cleft less deeply ; texture th in ly herbaceous ; rachis and
both surfaces naked ; sori roundish or transversely oblong, placed in small
depressions a t the apex of the lobes.—H k . Sp. 2. p . 15. Ic. P L t. 467.
Hab. Province of Goyaz, Brazil ; gathered by Mr, Gardner.—A more tender plant
than A. caudatum, which is not known in America, but not clearly distinct. A, rhizo-
n, Schrad., also from Brazil, is closely allied, or may be the same.
Polysorous group.—Fronds once or more pinnate, the f r u it in numerous
roundish or ohlong or transversely reniform marginal patches. Sp. 7-31.
t Ultimate segments not dimidiate, hut having two more or less distinctly opposite
rows o f sori. Sp. 7-12.
7. A. Kaulfussii, K unze; S t. 4-9 in. L, wiry, erect, naked, polished, blackish ;
f r . 6-12 in. 1., 3-4 in. br., with a large terminal lobe and 1 to 12 alternate
on each side, the lowest 2-3 in. 1., ¿-1 in. br., cordate and auricled broadly at
the base above, roundly cut away on the lower side, slightly stalked, and
those of the barren frond slightly toothed ; texture coriaceous ; rachis pube sc en t;
sori in interrupted marginal lines.—H k . Sp. 2. p . 7. H k . Gr. 1 .100.
Hab. Mexico and West Indies, southward to Brazil and Peru.—This and the next
are the only species of the group with a clearly-defiued midrib.
8. A. obliquum, W illd .; st. 3-6 in. 1., erect, wiry, polished, blackish, slightly
p ubescent; f r . 6-12 in. 1., 2-4 in. br., with a terminal lobe and 3 to 12 pairs of
alternate the lowest 1-2 in. 1., ¿ - J in. br., costate nearly to the apex, the
upper half the largest, rounded at the base, the lower half obliquely tru n c a te at
the base, shortly stalked, those of the barren frond slightly toothed ; texture
coriaceous ; rachis pubescent; sori in numerous interrupted marginal patches
1-2 lin. br.—H k . Sp. 2. p. 8. t. 79. A.
Hab. West Indian Islands, Columbia, and Guiana.—Very doubtfully distinct from
.<4. Kaulfussii. The characters relied upon are the thicker texture of this, its more continuous
sori, and the absence of a glaucous tinge on the under side of the leaves, Gvise-
bach refers the obscure A. denticulatum, Swartz, to this i
> I