PHANEROGAMS— PROFESSOR BAYLEY BALFOUR. 123 



For extensive synonymy see authors quoted. 



Socotra. Common. B.C.S. nn. 393, 460. Schweinf. n. 284. 



Distrib. Common in tropical Asia, Africa, and Australia. 



2. AGERATUM. 



Ageratum, Linn. Gen. n. 936 ; Benth. et Hook. Gen. PI. ii. 241. 



A genus of about sixteen species. They are American herbs or shrubs, but 

 one is widely spread throughout the tropics. 



A. conyzoides, Linn. Sp. 1175 ; DC. Prod. v. 108 ; Oliv. and Hiern in 

 Oliv. Flor. Trop. Afr. iii. 300 ; Hook. fil. Flor. Brit. Ind. iii. 243. 



Socotra. About Tamarida. B.C.S. n. 614. Schweinf. n. 285. 

 Distrib. Cosmopolitan in the tropics. 



3. DICHROCEPHALA. 



Dichrocephala, DC. in Guill. Arclnv. Bot. ii. 517, and Prod. v. 371 ; Benth. et Hook. Gen. 

 PI. ii. 260. 



A genus of herbs, referable to five species confined to the tropics of the old 

 world. 



D. chrysanthemifolia, DC. Prod. v. 372 ; Oliv. and Hiern in Oliv. Flor. 

 Trop. Afr. iii. 303 ; Hook. fil. Flor. Brit. Ind. iii. 245 ; Wight Ic. t. 1095. 



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



Socotra. On the top of Haghier above Adona. Altitude over 4000 feet. 

 B.C.S. n. 241. 



Distrib. Tropical Africa and Madagascar, India and the east. 



Our Socotran plant, referred to this species, differs from the type in some 

 points. It is a much more hairy plant, and the achenes are not quite glabrous, 

 but are slightly glandulose towards the apex, and the leaves have much less 

 acutely cut segments. 



4. CONYZA. 



Conyza, Less. Syn. Comp. 203 ; Linn. Gen. n. 950, pro parte ; Benth. et Hook. Gen. PI. ii. 283. 

 A genus containing about fifty species of herbs, rarely shrubs, widely dis- 

 persed in the warmer regions of both hemispheres. 



C. Hochstetteri, Schultz Bip. in herb. Schimp. Arab. nn. 162, 1366 ; 

 Oliv. and Hiern in Oliv. Flor. Trop. Afr. iii. 312. 



Socotra. Not common. B.C.S. n. 598. Schweinf. n. 617. 

 Distrib. Abyssinia. 



5. PSIADIA 



Psiadia, Jacq. Hort. Schoenbr. ii. 13, t. 152 ; Benth. et Hook. Gen. PL ii. 284. 



A small genus of about twenty species of shrubby plants, restricted to the 



