PHANEROGAMS— PROFESSOR BAYLEY BALFOUR. 169 



Distrijb. Somali Land. 



A very distinct species of this genus, as Franchet remarks. It resembles in its 

 indumentum the Arabian G. Boveanum, Dene, (in Ann. Sc. Nat. ser. 2, ix. (1838), 

 335, t. 12), but is easily distinguished by its larger leaves and different flowers. 

 The flowers, it is worthy of remark, show corona-scales, linear-subulate through- 

 out, not, as is typical of the genus, broad peltate scales with an apical flagellum. 



From the Somali Land plant, as figured by Franchet, which I have seen 

 in Paris, our plant varies slightly, having much longer and more incurved 

 corona- scales and leaves not so persistently obovate. Our specimens enable us 

 to complete the description of the species with fruit and seed characters. 



6. CALOTROPIS. 



Calotropis, R. Br. in Mem. Wern. Soc. i. 39 ; Bentb. efc Hook. Gen. PI. ii. 754. 



A ditypic genus; the species inhabiting the warmer parts of Asia and 

 Africa. 



C. procera, R. Br. in Ait. Hort. Kew. ii. 78 ; Dene, in DC. Prod. viii. 

 535 ; Ach. Rich. Tent. Flor. Abyss, ii. 33 ; Boiss. Flor. Orient, iv. 57 ; Hook. fil. 

 Flor. Brit. Ind. iv. 18 ; Wight Ic. t. 1278 ; Bot. Reg. t. 1792. 



Nom. Vern. Oscher (Schweinf.). 



Soeotra. Common near Galonsir and elsewhere. B.C.S. n. 24. 



Distrib. A widespread species from the Canary Islands through tropical 

 Africa and south-west Asia to India. Introduced in the west Indies. 



7. VINCETOXICUM. 



Vincetoxum, Monch. Meth. Bot. 717 ; Benth. et Hook. Gen PI. ii. 761. 



A large genus of erect or twining herbs or shrubs, chiefly found in temperate 

 and warmer regions of the globe. More rare in the tropics. 



V. linifolium, Balf. fil. in Proc. Roy. Soc. Edin. xii. (1883), 79. Tab. LI. 



V dubile glaucum ramis flagelliformibus; foliis filiformibus ; cymis extra-axillaribus lateralibus 

 longe pendunculatis ; corona 5-fida, lobis carnosulis obtusis. 



Frutex volubilis glaucus ramis scopariis striatis glabris spiraliter inter se tortuosis ultimis 

 flagelliformibus, internodiis elongatis saepe 3 poll, longis. Folia opposita facile detersa 

 filiformia basi attenuata et subpetiolata 2 poll, longa v. minora crassiuscula glabra, 

 juvenilia in axillis villosa. Gymce racemosse lateraliter extra-axillares, rhachi \— § poll, 

 longa tenui; pedicelli -^-^ poll, longi capillares ; bracteolse minutiae. Mores parvi. 

 Calycis segmenta ^ poll, longa acuta subcarinata. Corollas lobi ^ poll, longi late ovati 

 obtusi. Corona alte lobata, lobis carnosulis obtusis antice jugo prominulo apice subdelt- 

 oideis et inflexis gynostegio brevioribus. Stigma planum vertice obscure umbilicato 

 Folliculi lineares acuminati leves 2\ poll, longi. Semina % poll, longa. 

 TRANS. ROY. SOC. EDIN. VOL. XXXI. Y 



