THE FLORA OF ADEN. 



Gl 



species in common with this area : — Argyrolobium arabicum, Tephrosia 

 pogono stigma, Acacia hamulosa, Statice axillaris, Statice cylindrijolw, 

 Heliotropium pterocarpum, Schiveinfurthia pterosperma, Linaria maci- 

 lenta, Halopeplis perfoliata, Salsola forskalii, Anabasis ehrenbergii, 

 Euphorbia cuneata, Tricholcena leucantha. On the northern coast of 

 Somaliland only and in South-Arabia the following plants occur : — 

 Cleome brachystyla, Gypsophila montana, Jatropha spinosa, Euphorbia 

 systyla, Crotalaria leptocarpa, Convolvulus sericophyllus. Some species 

 are found in Yemen and Hadramaut or in Yemen alone, viz., Tvdigofera 

 arabica, Sterculia arabica (also on the island of Socotra), Cassia adenensis, 

 Acacia edgeworthii, Corallocarpus glomemdijlorus, Ptychotis arabica, 

 Pulicaria glutinosa, Steinheiliu radians, Caralluma forskalii, Caralluma 

 adenensis, Campylanthus junceus, Lavandula setifera, Salsola bottce. 



The third group shows a wider distribution, containing members of 

 the N. African Steppe-province, which comprises Kordof'an, Darfur, 

 Sennaar, Etbai, Abyssinia, Yemen, Hadramaut, Somaliland and the 

 island of Socotra. A good many species reach eastwards as far as Sind 

 and the Punjab. 



The subjoined table shows the species with their respective boun-' 

 daries of distribution : — 



Species. 



Boundary towards 



West. 



Bast. 



1. Cleome papillosa Kordofan. 



2. CI. brachycarpa Kordof an. 



3. Cl.paradoxa Kordofan. 



4. Cadaba rotundifolia . . e . . . Kordofan. 



5. C. gland ulosa Kordofan. 



6. C. longi folia Sennaar. 



7. Reseda aniblyocarpa Abyssinia. 



8. Melhania. denhami Kordofan. 



9 Indigofera semitrijuga Sennaar. 



10. Tephrosia apollinea Upper Egypt. 



11. T-iverniera glauca Abyssinia. 



12. Rhynchosia minima Sennaar. 



13. Poinciana elata Nubia. 



14. Acacia spirocarpa Kordofan. 



15. A. nubica Nubia. 



16. A. mellifera Kordofan. 



Sind. 



N.-W. India. 

 S-.Arabia. 

 S.-Arabia. 

 S.-Arabia. 

 S.-Arabia. 

 S.-Arabia. 

 Sind. 

 Sind. 



Beluchistan. 

 S.-Arabia. 

 Sind. 

 Sind. 

 S.-Arabia. 

 S.-Arabia. 

 I Yemen. 



