GENERA FUMARIA AND RUPICAPNOS. 943 
Pomel's last section, comprising the annual species, is readily distinguish- 
able by its suberect, shortly branched habit and its few-flowered racemes. 
Its fruits are often more compressed than those of the other sections, with a 
thinner and peculiarly muricate pericarp. It is proposed to name this section 
Muricaria after one of the most strongly marked species. 
The first-named of these sections, Callianthos, readily lends itself to a 
subdivision into two subsections, some of the species, like R. africana, 
showing more or less narrow leaf-segments and whitish flowers, while others 
have distinctly broader lobes and pale purple flowers. These two subsections 
are termed Africane and Pomeliane respectively. 
It will be observed that the sequence of sections adopted in the following 
account of these plants places Callianthos last in the series. This order 
is followed on the assumption that in an account of the family /umariacee 
the genus Rupicapnos follows Sarcocapnos and precedes Fumaria. 
SPECIES OF Rvproapyos AND THEIR DISTRIBUTION. 
In this Revision all of Pomel’s fifteen species are retained (subject to two 
changes of name) although none of his types have been seen and synonyms 
are cited by him only in four cases. Herbarium material under different 
names, however, has been identified with six of his remaining species with 
some confidence, and with a strong degree of probability in the case of a 
seventh. The other four species have been adopted out of deference to 
Pomels judgment and as the diagnoses themselves show an inherent 
probability of the plants being really distinct. In addition, five fresh species 
are described for the first time, four of these being unknown to Pomel and 
the fifth not distinguished by him. The total number of species of Rupicapnos 
thus becomes 20. Of these, eight belong to the large-flowered group 
Callianthos, five being Africanw and three Pomelianw ; five are species of the 
section Tripterye ; two of Sarcocapnoides ; and there are five known annual 
species or Muricarie. 
The geographical distribution of the genus, which as a whole is confined to 
North Africa from Tunis to Morocco, with one species extending to 
Andalusia, is of some interest. The species of the section Callianthos 
prevail towards the west and are not known in the Sahara districts. They 
occur on mountain rocks in many places in the Algerian province of Oran 
north of the plain of Schott, and extend eastward at least as far as Milianah, 
in the province of Algiers. In ihe west they have been collected at Tetuan, 
near Tangiers, and will presumably be found in intermediate stations in the 
eastern half of Morocco when that country becomes more accessible. One 
species reaches Europe, inhabiting the Andalusian provinces of Malaga and 
Cadiz. 
The range of the section Tripteryæ, which is almost exclusively Algerian, 
lies to the east, and is nearly contiguous with though apparently not over- 
