326 37. ADIANTUM. § 1. EU-ADIANTUM. C. POLYSORIAE. 



Stipes 15 — 40 c.M. long, firm, erect, naked, blackish, polished. Fronds 

 2_3-pinnate with a terminal branch 10—20 c.M. long, 5 — 8 c.M. broad and 

 2 — 4 large ones on each side, the lowest of /ich are often branched again. / wr^ 

 Leaflets 5 — 6 c.M. long, 1 — 3 c.M. broad, dimidiate, the apex + acute, the 

 upper and lower edges parallel, the lower sometimes decurved, the outer edge 

 oblique, the inner deflexed, the upper and outer edge more or less deeply 

 or shallowly lobed, the lobes blunt; lowest leaflets on stalks \ — \\ c.M. 

 long. Texture papyraceo-herbaceous ; rachis and both surfaces naked; veins 

 terminating in the ultimate lobes or their crenati^s or serratures when 

 present. Sori numerous, terminal on the lobes, approximate, transversally 

 oblong; capsules on the veins only, but densely crowded. 

 Much cultivated. — Orig. loc: Trop. America. 



» (12) A. pernvianum, hi., Hk. Bk., Syn. Fil., 116; Hk. Spec. 

 Fil., II, tab. LXXXI, C. 



Stipes 15 — 25 c.M. long or longer, erect, naked, polished, nearly black, 

 deciduously scaly at the base. Fronds either simply pinnate or 2-pinnate 

 with 1 — 3 branches at the base or even with some of the latter slightly 

 branched again. Leaflets large, 4— 7 c.iM. long, 5 — 5 c.M. broad, unequally 

 ovate or subtrapezoidal, the base broadly cuneate or subtruncate, the edge 

 slightly lobed, the apex varying from bluntish to acuminate; lowest leaflets 

 on stalks 1 — 2 c.M. long. Texture papyraceous; veins copious, flabellate, ter- 

 minating in the ultimate lobes or their crenations or serratures when pre- 

 sent: rachis and surfaces naked. Sori many or nuiuerous along the upper 

 and outer edge; capsules springing from the veins only. — Leaflets mostly 

 resembling those of A. platyphyllum, Sw. 



In cuUivalion. — Orig. loc: Peru. 



** (13). A. llettenii, Suhn, Hk. Bk., Syn. Fil., Vll ; A. lunulatum, 

 Burm., var. Meltenii, Bedd., Handb. Ind. Ferns, 83; Ferns S.Br.I., SuppL, tab. 

 CCCLIV; A. alatum, Copel., Polypod. Philipp., 93. 



Rhizome erect, short. Stipes + 8— 12 c.M. long, blackish-brown, glossy, 

 slightly scaly at the base, more or less narrowly winged throughout like the rachis 

 and the stalks of the pinnae. Fronds 10 — 30 c.M. long, + 4 — 5 c.M. broad, 

 simply pinnate. Leaflets more or less spreading, the lower often subdeflexed, 

 1 — 1 '/^ c 31. broad ; the lower side entire, nearly straight, the upper and 

 outer ones rounded, ± irregularly lobed, the inner one subparallel to the 

 rachis. Texture papyraceous; surfaces naked; veins conspicuous. Sori trans- 



