318 



assigned to the genus. 



Naturf. 



Gesellsch., xxxvii., upholds the genus Belmont ia ; but in Bull. 

 Herb. Boiss., ser. II., vi., 1906, pp. 711-744, he merges Belmontia, 

 E. Mey., in Sebaea, though he retains the species formerly- 

 included in that genus in his section ' Belmontia.' At the same 

 time (ibid., p. 744) he keeps up Exochaenium, Griseb., and includes 

 in that genus certain plants which had been placed under Bel- 

 montia by earlier writers. It should be mentioned that Rafin- 

 esque's name Parasia {Rafin.,Fl. Tellur. iii., 1836, p. 78), is slightly 

 earlier than Belmontia, E. Mey., since Meyer's Gomm., fasc. ii., 

 containing the Gentianaceae, was published in 1837, and not in 

 1835, as stated by Schinz. Rafinesque's name is ignored by 

 Gilg in Engl. <k Prantl, Pflanzenfam., iv., ii. p. 66, but it has been 

 revived by S. L. Moore for his new species Parasia Thomasii in 

 Journ. Bot., xxxix., 1001, p. 260, and Journ. Bot., xlv., 1907, p. 154. 

 This species is now, however, included in Sebaea. 



In the Flora Capensis the genus Belmontia is merged in 



Sebaea, and it seems hardly possible to maintain even the two 



sections Eusebaea and Belmontia of the latter genus, since two 



species, at least, occupy an intermediate position between these 



sections, and make it impossible to separate them by hard and 

 fast lines. 



Exochaenium was established as a genus by Grisebach in 1845, in 

 Db.Prodr.,VK .p. 55, to receive Meyer's Belmontia grandis (E. Mey., • 

 U»nm.,n.-p. 183) ; and 'two further species were added by Welwitsch 

 in 1 rans.Linn. Soc., xxvii., pp. 47, 48. As already stated, Bentham 

 ana Hooker f., Gilg in Engler and Prantl, Schinz in Viertel- 

 ?ahrschr. Zurch.Naturf. Gesellsch., xxxvii., p. 330, et s^.,and Baker 

 and Brown in Flor. Trop. Africa, iv., i., p. 552, et seg., include 

 txochaenium under Belmontia ; but Schinz in his last memoir in 

 tsuu. Herb Boiss., ser. II., vi., p. 744, restores the genus Exochae- 

 nium, m which he includes eight species. One of Welwitsch's 

 species {E. debde, Welw.), is excluded and placed in Sebaea, and 

 tne remaining six have been taken out of Belmontia, E. Mey. 



nJ~ Q he .^*°x a . Ca P ensi * the genus Exochaenium is upheld, the 

 only bouth African representative being E. grande, Griseb. There 



f a 1 r e - F ' f Veral other s P ecies in Tropical Africa. The genus 

 s characterised especially by the presence of a ring of disk-glands 



on^nK 6 Cal j? and c o™lla, the stamens are inserted in the 

 fn^In V an 3 e ? y,e does not Possess the biglandular swell- 

 Jw !Z Hy f ? und m Sebaea. It is of interest to notice in passing 

 mat some of the species of Exochaenium have dimorphic flowers. 



A fS! ge -?? S S l 6baea cont ains about 100 species, chiefly in South 



»d S£ talanl m Tr ° PiCal **»■ " 



vrHh h !i!? reSentatives are ann ual, biennial, or perennial herbs, 

 with iw™ ?° re . rarely > Procumbent simple or branched stems 

 keetl nr I rent W1 , ngS> ln the flower tne calyx-segments are 

 be sitn^Prl ?n 6 ^ r lGSS conspicuously winged. The anthers may 

 thV tnhJ 1 i 8inuses of the corolla o r more or less deeply in 



wkh mi JS i are i USU . alIy P rovided w ith apical and sometimes also 

 w • h^ n f 8 ? 1 glands - The style in m ost cases is furnished 



which in ?f? lar 8WelHng ( absent in the subsection Lagenias), 

 wnicn in a few species is more or leas ™nfWnt with tw «t.i«,m a 



Mada 



