PHANEROGAMS — PROFESSOR BAYLEY BALFOUR. 83 



17. ERYTHRINA. 



Erythrina, Linn. Gen. n. 855 ; Benth. et Hook. Gen. PI. i. 531. 



A world-wide genus in warmer regions, containing only a few species. 



Erythrina sp. 



A species of Erythrina occurs on the island. It is a plant, so far as our 

 specimens show, with a thin very fibrous bark bearing strong dark-brown 

 prickles, slightly decurved, f inch long, clothed at the base with a short grey 

 tomentum. The leaves, of which we have but a few, are all obtuse and emar- 

 ginate, wide and suborbicular. Unfortunately we have no flower, and the 

 material is not sufficient for determination. 



Socotra. Hills south from Tamarida. B.C.S. n. 653. 



18. CANAVALIA. 



Canavalia, Adans. Fam. ii. 325 (Canavali) ; DC. Mem. Leg. 375 ; Benth. et Hook. Gen. PI. i. 537. 

 A small genus of wide distribution in the tropics. 



C. ensiformis, DC. Prod. ii. 404 ; Baker in Oliv. Trop. Afr. ii. 190, and in 

 Hook. Flor. Brit Ind. ii. 195. 



C. polystachya, Schweinf. Reliq. Kotsch. 25, t. 20. 

 Dolichos gladiatus, Jacq. Icon. Bot. t. 560. 



Nom. Vern. Dhoodha (B.C.S.). 



Socotra. On the hill slopes. Not uncommon. B.C.S. n. 424. 



Distrib. Tropics generally. 



19. VIGNA. 



Vigna, Savi Mem. Phas. iii. 7 ; Benth. et Hook. Gen. PI. i. 539. 

 A widely dispersed tropical genus. 



V. luteola, Benth. in Mart. Flor. Bras. xv. i. 194, t. 50, f. 2 ; Baker in 

 Oliv. Flor. Trop. Afr. ii. 205, and in Hook. Flor. Brit. Ind. ii. 205. 



Nom. Vern. Habetli (B.C.S). 



Socotra. Common. B.C.S. n. 377. Schweinf. nn. 462, 500. 



Distrib. Cosmopolitan in the tropics and at the Cape. 



20. CYLISTA. 



Cylista, Ait. Hort. Kew. ed. 1, iii. 512; Benth. et Hook. Gen. PI. i. 542. 



A monotypic genus, very near Rhynchosia, but distinguished therefrom by 

 its peculiar membranous irregular calyx ; hitherto known only in the Indian 

 peninsula and in Mauritius. 



