lviii 



BOTANY OF SOCOTRA. 



Table showing distribution of genera with endemic species in the 



PHANEROGAMIC FLORA OF SOCOTRA — continued. 



Genera. 



Porana, 



Breweria, . 

 Witliania, . 

 Camptoloma, 



Campylanthus, 



Graderia, 



Xylocalyx, 



Ruellia, 



Blepharia, 



Barleria, 

 Neuracanthus, 

 Ballochia, . 



Justicia, 

 Trichocalyx, 

 Anisotes, . 



Rhinacanthus, 

 Ancalanthus, 

 Ecbolium, . 



Dicliptera, . 



Hypoestes, 



Cockburnia, 



Ccelocarpus, 

 Clerodendron, 

 Orthosiphon, 

 Lavandula, 



Leucas, 

 Lasiocarys, 



Tcucrium, 



Wellstedia, 



Haya, 



Lochia, 



Aerua, 

 Lasiosiphon, 



Usyris, 

 Euphorbia, 



1'liyllantlius, 



Securiuega, 



Jatropha, 



Croton, 



Ceplialocroton, 



Tragia, 

 Dorsteiiia, 



Ficus, 

 Habenaria, 

 Babiana, 

 Crionm, 



Remarks. 



A small genus of India and the Malay Archipelago, 

 extending to Australia. Also Madagascar, but 

 not African. 



Reaches the Canary Islands. 



Only one other species outside of Socotra, at 



Elephant's Bay, south Africa. 

 Only four other species outside of Socotra. One in 



Aden reaches to Scindh, one occurs in Scindh 



and Beloochistan, and two grow in Cape de 



Verde Islands. 

 Only two species known outside of Socotra ; one 



being south African, the other, undescribed, is 



from Angola. 

 Allied to Graderia and adjacent genera. 

 Headquarters in tropical America. 



Some American. 



More Asian than African. 



Tritypic. Allied to the monotypic Orcacanthus of 



the Cameroon highlands and other tropical 



African genera. 



Ditypic. Allied to the widely distributed Justicia. 



Has only two -representatives outside of Socotra — 

 one Arabian, the other east tropical African. 



Reaches Madagascar. 



Allied to the Brazilian genus Schaueria. 



There is only one species of the genus outside of 

 Socotra, and it is widely spread in tropical 

 Asia and Africa. The Socotran plant has a 

 distinct variety in addition to the specific form. 



Allied to Globularia, a genus of the Mediterranean 



region. 

 Allied to the American genus Cilharexylum. 

 Mostly Old World. 

 Extends to Australia. 

 Reaches Canaiy Islands on the west, and India 



on the east. 

 Extends to Australia. 

 Three species are known outside of Socotra — one is 



south African, and the two others are Abyssinian. 

 Attains a maximum in Mediterranean region. 

 Quite aberrant. 

 Allied to the monotypic Illcccbrum of Europe and 



west Africa. 

 Allied to the monotypic Gymnocarpos, which 



spreads from the Canary Islands to Scindh. 



Chiefly south African ; also Madagascar. 

 Occurs in south Europe. 



Has only two species outside of Socotra — one in 

 east tropical Africa, the other Nile-land. 



Chiefly American and tropical African. Two species 

 are Asian, one in Arabia, and one in India. 



South African entirely. 



