BOTANICAL GEOGRAPHY. 423 



Elizabeth Island, which belongs to the botanical district of the South 

 Sea Islands, in the southern hemisphere, but is situated nearer to the island 

 of Juan Fernandez and the continent of America than the others, also con- 

 tains the new arborescent Cichoraceous genus, Fitchia, whilst the other 

 islands of this archipelago do not contain similar forms of plants. 



I. EUROPE. 



Of Ledebour's Flora Rossica (see the Annual Report 

 for 1841 and 1843), the 6th part appeared in 1845, 

 and the 7th in 1846 (vol. ii, part 2). 



The statistical proportions of the families treated of in them are as fol- 

 lows : Synantheracese, 890 sp. The Vernoniacese are only represented by 

 the Caucasian Gundelia ; of the Eupatoriae, in addition to the West-Euro- 

 pean genera, Nardosmia and 7 arctic species ; the Asteroidese comprise the 

 exclusively Asiatic genera Turczaninoma, Calimeris, Arctogeron, Diplopappus, 

 Rhinactina, Myriactis, Brachyactis, Dicrocephala, Karelinia, Eclipta, and 

 Siegesbeckia, which extends as far as the Crimea ; among the Senecionidae, 

 including the Heleniee, RicMeria and Cancrinia, Brachanthemum, one of the 

 Chrysanthemeae from Siberia, Valdheimia from Altai, Cladochaeta and 

 Amblyocarpum from the Caucasus, and Senecillis from Podopolien. The 

 genera most abundant in species are Artemisia (83 sp.), Senecio (52 sp.), 

 Achillea (31 sp.), Pyrethrum (29 sp.) ; among the Cynaracese, including 

 Acanthocephalus and Haplotaxis (3 sp.), and Ancathia from Altai, Alfredia 

 (4 sp.) from Siberia, and Cousinia (20 sp.) and Acroptilon from the Steppes, 

 and Acantholepis, Chordinia, and Oligochceta from Armenia. Those con- 

 taining most species are Centaurea (61 sp.), Cirsium (51 sp.), Serratula with 

 Jurinea (36 sp.), Samsuria (32 sp.) ; the Cichoraceae contain Heteracia and 

 Microrhynchm from the Steppes, Asterothrix from the Caucasus, Intybellia 

 from the Crimea, Youngia (5 sp.) from Armenia and Siberia, Ixeris and 

 Nabalus from Siberia, Apargidium from Sitcha ; and of larger genera, Hiera- 

 cium (25 sp.), Crepis (23 sp.), Scorzonera (19 sp.), Lactuca (17 sp.), Trago- 

 pogon (17 sp.) ; Lobeliaceas, 2 sp. ; L. dortmanna, and in Eastern Siberia 

 L. sessilifolia; Campanulaceae, 66 sp., containing Michauxia and Symphyandra 

 from the Caucasus, Platycodon from Darien ; the genera containing most 

 species being Campanula (36 sp.) and Adenophora (10 sp.) ; Vaccinias, 

 11 sp., including 4 sp. from Sitcha, 1 sp. from the Aleutian Islands, and 

 V. arctostaphylos from the Caucasus ; Ericese, 36 sp. ; 2 Rhododendra and 

 Azalea Pontica, confined to the Caucasus, extending hence to Dombrowitza 

 in Lithuania, 4 sp. of Cassiope, Eryanthus, 2 sp. of Amothamnus, 5 sp. of 

 Rhododendron confined to Siberia, 2 sp. of Cassiope, Menziesia, 1 sp. of 



