CRYPTOGAMS VASCULARES— PROFESSOR BAYLEY BALFOUR. 325 



Nom. Vern. Youlaham. 



Socotra. Not frequent. B.C.S. n. 415. Schweinf. nn. 772, 773. 



Distrib. Widely spread in tropical and warm temperate regions. 



2. A. sethiopicum, Linn. Sp. 1560 ; Hook, and Baker Syn. Fil. ed. 2 

 (1874), 123 ; Hook. Sp. Fil. ii. 37, t. 77 A. 



A. thalictroides, Willd. mss. ; Kze. in Linnaea x. 530. 



Socotra. On the Haghier hills south of Tamarida. B.C.S. n. 436. 



Distrib. Throughout the tropics of both hemispheres, especially in 

 Abyssinia, at the Cape, and in Australia. 



This is the form with large pinnules, the A . crenatum, Poir. Encyc. Suppl. i. 

 137. 



3. A. Balfourii, Baker in Proc. Eoy. Soc. Edin.; Kuhn in Ber. Deuts. 

 Bot. Ges. i. (1883), 238. Tab. 99. 



Caudice brevi reptatite, paleis deusis parvis linearibus brunneis, stipite nudo elongate* ; 

 frondibus lanceolatis simpliciter pinnatis glabris baud caudatis, pinnis 6-10-jugis 

 brevissmie petiolatis orbicularis, basi late deltoideis ; soris linearibus inaequalibus secus 

 pinnarum marginem totam prseter basin productus. 



Caudex leviter reptans epigseus, crassitie pennae cygni, paleis firniis brunneis linearibus \ poll, 

 longis dense vestitus. Stijntes nudi erecti graciles castanei contigui 4-6 poll, longi. 

 Lamina lanceolata glabra membranacea utrinque viridia 6-8 poll, longa. 1-1^ poll, lata, 

 ad apiceni haud caudatam sensim attenuata, rbacbi gracili nuda castanea, pinnis 6-10-jugis 

 brevissime petiolatis plerisque oppositis vel suboppositis orbicularis £-1 poll, latis, basi 

 late deltoideo vel in inferioribus truncato, margine sterilium denticulato, venis crebris 

 gracillimis e basi flabellatirn radiantibus. Sori secus marginem totam pinnarum prseter 

 basin dispositi lineares valde insequales, involucro angusto glabro brunneo persistente. 



Socotra. Abundant on the hills at the eastern and central parts of the 

 island. B.C.S n. 198. Schweinf. nn. 544, 774. Kuhn (loc. cit.) gives also 

 n. 302 for some of Schweinfurth's specimens. We do not have it from 

 him under that number. 



Distrib. Endemic. 



This species has its nearest ally in A. lunulatum, Burm. Flor. Ind. 235. 

 But from it in all forms it is readily distinguished by its orbicular and equally 

 sided pinnules, which are all shortly stalked. 



2. CHEILANTHES. 



Cheilanthes, Swartz Syn. Fil. 126 ; Hook, and Baker Syn. Fil. ed. 2 (1874), 131. 



A considerable tropical genus, of about 60-70 species, some of which extend 

 into extra tropical regions. 



Ch. (Aleuritopteris) farinosa, Kaulf. Enum. Fil. 212 ; Hook, and Baker, 

 Syn. fil. ed. 2 (1874), 142 ; Bedel. Ferns South. Ind. t. 191 ; Bot, Mag. t. 4765. 

 Socotra. On the hills south-west of Galonsir. B.C.S. n. 329. 



