GEOGRAPHICAL BOTANY. 347 



tribution. The families containing most species form 

 the following series : Synantheracea3 (264 sp.), Legumi- 

 nosae (203 sp.), Graminaceae (156 sp.), Labiatae (134 sp.), 

 Caryophyllaceae (130 sp.), Cruciferae (121 sp.), Umbelli- 

 ferae (114 sp.), Scrophulariaceae (90 sp.), Ranunculaceae 

 (78 sp.), Rosaceae (68 sp.), Boraginaceae (55 sp.), Lilia- 

 ceae (53 sp.), Rubiaceae (48 sp.), Campanulaceae (41 sp.), 

 Orchidaceae (41 sp.), Cyperaceae (41 sp.) When this 

 series is compared with that given above for Dalmatia, 

 the increase in the Labiatae and Caryophyllaceae becomes 

 one of the characteristic peculiarities of Rumelia. The 

 former family does not reach the centre of its distribution 

 through the south of Europe until we arrive at Greece ; 

 but the Silenaceae, which abound in endemic forms of 

 Dianthus and Silene, do not appear to be anywhere more 

 numerous than in Rumelia. The increase in the Ranun- 

 culaceae, Boraginaceae, and Campanulaceae is also worthy 

 of consideration ; but I must confine the deductions to these 

 few facts, since if carried further than the extent of our 

 present knowledge admits, they would lose in truth. 

 The extent of our knowledge of the flora of Rumelia is 

 much better shown by the examination of those vegetable 

 forms which are endemic to that country, than by sketches 

 of the entire vegetation, in which so many constituents 

 are still wanting. Of these 2300 species of plants, about 

 the seventh part are peculiar to the peninsula of Europe : 

 from these about 80, which have only been found in 

 Bithynia, are excluded, a great part of which, however, 

 will probably be found also on this side of the Bosphorus. 

 Moreover, if we take into account the distribution of 

 Greek plants over the south, and of Dalmatian over the 

 west of Rumelia, we may consider more than two thirds 

 of the endemic plants of the south-east of Europe as 

 known. Summary of the endemic plants of Rumelia : 

 23 Leguminosae, principally species of Trifolium (5), and 

 Astragalus (9), mostly belonging to the evergreen region ; 

 5 Rosaceae, of these, 3 Dryadeae to the mountainous re- 

 gion ; 2 Rutaceae (Hoplophyllum) ; 4 Euphorbias, of which 



