

PHANEROGAM M — PROFESSOR BAYLEY BALFOUR. 199 



differences in appearance are very pronounced, and, notwithstanding their great 

 likeness in habit and foliage, there is no difficulty in separating the species. 



I have searched through the specimens of W. somnifera, in Kew Herbarium, 

 but have not been able to find on any of them an approach to the calycine con- 

 dition of this new Socotran species. All plants even from the adjacent shores 

 of Arabia and Africa are typical W. somnifera. This is the only species in our 

 collection, but Schweinfurth found it growing along with the true W. somni- 

 fera. 



The vernacular name Abab or Obap is, according to Schweinfurth, the same 

 as that given by the Arabs on the opposite Arabian coast to W. somnifera. 

 His specimens from Schugra, he tickets, ' Abubb.' 



4. LYCIUM. 



Lycium, Linn. Gen, n. 262 ; Benth. et Hook. Gen. PI. ii. 900. 



A moderate genus of usually spiny shrubs or small trees, inhabiting 

 temperate and subtropical regions of the whole world, but most abundant in 

 south America, and south Africa. 



L. europseum, Linn. Mant. 47 ; T. Anders, in Ann. Nat. Hist. ser. 2, xx. 

 126, and in Journ. Linn. Soc. v. (1860), Suppl. 20 ; Clarke in Hook. Flor. 

 Brit. Ind. iv. 240; Sibth. Flor. Graec. t. 236. 



L. arabicum, Schweinf. in herb. ; Boiss. Flor. Orient, iv. 289. 

 L. mediterraneum, Dunal in DC. Prod. xiii. 1. 523. 



There are many other synonyms, for which see authorities quoted. 



Socotra. Common about Galonsir and elsewhere. B.C.S. n. 95. 

 Schweinf. n. 728. 



Distrib. Mediterranean region and south-west Asia, India. 



5. DATURA, 



Datura, Linn. Gen. n. 246 ; Benth. et Hook. Gen. PI. ii. 901. 



A small genus of a dozen species, widely dispersed over the globe. 



D. fastuosa, Linn. Sp. 256 ; Dunal in DC. Prod. xiii. 1. 542 ; Clarke in 

 Hook. Flor. Brit. Ind. iv. 242 ; Wight Ic. t. 1396, 



var. alba, Clarke loc. cit. 243. 



D. alba, Nees ab Esenb. in Trans. Linn. Soc. xvii. (1837), 73 ; Dunal in DC. Prod. xiii. i. 541 ; 

 Wight Ic. t. 852. 



Socotra. Common near villages. B.C.S. n. 218. Schweinf. n. 316. 

 Distrib. Cosmopolitan weed. 



