﻿31. ADIANTUM. ^ 1. ElU-ADlANTUM. b. OLIGOSORIAE. o21 



» (2) A. macropbyllum, Sw., Hk. Bk., Syn. Fil., 121; Hk., Fil. 

 Exot., tab. LV ; Hk. k Grev., Ic. Fil., tab. CXXXII ; — var. striatum, Hort. Bog. 



Stipes 15 — 30 c.M. long, firm, erect, polished, naked, blackish. Fronds 

 20 — 40 c.lVI. long, 10 — 20 c.M. broad, simply pinnate with ± 4 — 6 pairs of 

 + opposite lateral pinnae below the terminal one. Lower pinnae (leaflets) 

 of the barren fronds 7 — 10 c.M. long, + 5 c.M. broad, so broad at the base 

 that the opposite ones frequently overlap; all the pinnae sessile or the lower 

 ones very short-stalked, inequilateral, but not dimidiate, the margin rather 

 distinctly lobed; fertile pinnae narrower than the barren ones. Texture 

 flaccido-papyraceous. Sori linear, in long-continuous or interrupted marginal 

 lines. — Occasionally this well-known species becomes 2-pinDate in the lower 

 part. The young fronds are often beautifully tinged with red. 



War. striatum : Beautifully variegated with long or short, broad or 

 narrow, white stripes placed irregularly between or along the veins. 



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



(3) A. platyphyllum, Sw., C. Chr., Ind. Fil.; A. Seemanni, Hk, 

 Hk. Bk., Syn. Fil., 121 ; Hk., Spec. Fil., H, tab. LXXXI, A. 



Stipes 15 — 25 c.M. long, erect, blackish, polished. Fronds 15 — 30 c.M. 

 long, 1 — 2 X pinnate. Leaflets 7—10 c.M. long, o'/j — 5 c.M. broad, ovate, 

 acuminate, rather unequal-sided, but not dimidiate, the barren ones finely 

 serrate, one side usually cordate at the base, the other obliquely truncate; 

 petioles of the lowest leafletsnearly 2^/2 c.M. loDg. Texture subcoriaceous ; veins 

 prominent; rachis naked, polished. Sori in long, continuous, marginal lines, 

 often accompanied by roundish or oblong ones. — Resembles A. peruvianum, 

 KL in habit. 



Iti cultivation. — Orig. loc: Centr. America, Brasilia, Bolivia. 



u. 



, $ 1. EU-ADIANTUM. c. Polysoriae. 



Fronds i — 2 X pinnate. 



h. Sori few, typically i — 2 to a leaflet. 



:^. Fronds simply pinnate. Indusium narrotv. (4) A. gomphophyllum. 

 •^.■:^. Fronds 2-pinnate. Indusium broad. (5) A. Hosei. 



h.h. Sori many, typically 3 or more to a leaflet. 



c. Surfaces pilose or strigose at least on the veins. 



%. Texture thinly herbaceous or membranaceous. (6) A. diaphanum. 

 $.§. Texture chartaceous or coriaceous. 

 FtticEs 21 



