﻿39. CHEILANTHES. ool 



§2. ALEURITOPTERIS. Ultimate segments not very small. Fronds coated 



beneath with a white or yellow powder. 

 § 3. EUCHEILANTHES. Like § 2, but the fronds not powdery beneath. 



§ 1. PHYSAPTERIS. 



(1) Ch. BoUoni, Copel., Polypod. Philipp., 9S. 



Stipes densely tufted, 1^2 — 3 c.M. long, brown-black, sparsely covered 

 with hairs of the same colour. Fronds linear-oblanceolate, to + 16 c.M. 

 long, 1^/2 c.M. broad, 2-pinnate, the broadest part % of the way from the 

 apex. Pinnae almost sessile, remote, the largest to + 8 m.M. long, 6 m.M. broad. 

 Pinnulae in 1 — 5 pairs, ovate, minute, crenulate, plane when moist, curling 

 up when dry. Texture very thin, but firm when dry; rachis blackish-brown, 

 nearly naked; surfaces naked. Indusium interrupted. 



Philippines. 



§ 2. ALEURITOPTERIS. 



a, 



Primary segments not reaching down to the rachis, i. e. joined at the base. 



(2) Ch. argentea. 

 a.n. At least the lowest primary segments reaching down quite to the rachis, 

 i. e. free from the next higher ones. 



b. Fronds 2-pinnatifid. (3) Ch. rufa. 



h.h. Fronds 3-pinnatifid. (4) Ch. farinosa. 



» (2) Cli. argentea, Kxe (not Hk.), Hk. Bk., Syn. Fil, 142;Bedd., 

 Perns Br.I., I, tab. CXLIII ; Pteris argentea, Gmel., (oldest name). 



Stipes densely tufted, 7 — 15 c.M. long, polished, dark-brown, scaly at 

 the base especially when young. Fronds 7 — 10 c.M. long, S — 8 c.M. broad, 

 3-pinnatifid at the base, the primary segments not reaching down quite to the 

 rachis. Lowest segments the largest with the lowest basipetal lobe the largest. 

 Costae polished like the stipe ; upper surface naked, the under one covered with 

 white, waxy powder. Sori very small, fusing; indusium crenate or fimbriate. 



Siberia to Malaya. 



FiLicES. 22 



