326 BOTANY OF SOCOTRA. 



Distrib. Across tropical Africa, and through Arabia to India and the 

 eastern Archipelago. Also in tropical America. 



Kuhn (in Ber. Deut. Bot. Ges. i. (1883), 239) acids to his note upon the 

 Socotran fern he names "Pteridella involuta, Mett. var. tripinnatisecta, Mett." 

 (which we refer to as Pellwa (Platyloma) viridis, Baker), the remark, 

 " Wahrscheinlich ist die in der Balfour 'schen Liste erwahnte Cheilanthes spec. 

 mit unserer Art identisch." This has been a mere guess. Our plant is very 

 different. 



3. ONYCHIUM. 



Onychium, Kaulf. Enum. Fil. 144; Hook, and Baker Syn. Fil. ed. 2 (1874), 143. 

 A small genus of tropical and subtropical species. 



0. melanolepis, Kze. Suppl. Schkuhr. Farnk. ii. 9, t. 104, f. 2; Hook, 

 and Baker Syn. fil. ed. 2 (1874), 143 ; Hook. Ic. PI. t. 902. 



Allosorus melanolepis, Dene. PI. d. PArab. Heur. in Archiv. d. Mus. ii. 189. 



Socotra. Forming large patches on stony ground on the hills south-west 

 of Galonsir. B.C.S. n. 291. 



Distrib. Abyssinia, Arabia, and Persia. 



4. PELLiEA. 



Pellcea, Link Fil. Sp. Berol. 59 ; Hook, and Baker Syn. Fil. ed. 2 (1874), 144. 



A considerable genus occurring in the tropics of both hemispheres. 



1. P. (Cheiloplecton) concolor, Baker in Mart. Flor. Bras. Fasc. xlix. 

 596. 



P. geraniifolia, Fee Gen. Fil. 130 ; Hook, and Baker Syn. Fil. ed. 2 (1874), 146 (gcraniwfolia) ; 



Hook. Ic. PL t. 915. 

 Pteris concolor, Langs, and Fisch. Ic. t. 21. 

 Donjoptcris concolor, Kuhn in v. d. Decken Eeisen iii. 3. 19, and iu Ber. Deut. Bot. Ges. i. (1883) 



239. 



Socotra. On the higher parts of Haghier at an elevation over 3000 feet. 

 Schweinfurth, n. 654. 



Distrib. Generally distributed in the tropics. 



2. P. (Platyloma) viridis, Baker in herb. Kew. 



P. hastcda, Link Fil. Sp. Berol. 60; Hook, and Baker Syn. Fil. ed. 2 (1874), 152; Hook. Fil. 



Exot. t. 50. 

 Pteridella involuta, Mett. var. tripinnatisecta, Mett. ex Kuhn in v. d. Decken Eeisen iii. 3. 15, 



and in Ber. Deut. Bot. Ges. i. (1883), 239. 



Socotra. At Kischen. Elevation over 1800 feet. Schweinf. n. 596. 

 Distrib. A species limited to Africa, and its adjacent tropical islands. 



