456 BOTANICAL GEOGRAPHY. 



the climate of Bokhara (Berliner Monatsber. fur Erd- 

 kunde, Bd. 2, pp. 132-40). 



North winds are always prevalent in Chanat, hence they are in the direc- 

 tion from the steppe to Hindu-Kusch, which explains its freedom from rain 

 and its continental distribution of heat. During eight months the wind was 

 in the opposite direction ten times only. In the city of Bokhara (1116' 

 above the sea) Chanykoff however found the mean temperature during a 

 severe winter = 30 F., i. e. lower, with the exception of Pekin, than has 

 previously been anywhere observed in the same latitude. The trees bud 

 between the 20th of March and the 10th of April. The vegetation of the 

 steppes between Samarkand and Karschi lasts from the middle of March to 

 the end of April ; but the temperature remains high from the middle of 

 March to the end of November, and is excessive in the summer. 



TschihatchefFs work upon his travels in eastern Altai, 

 principally the district of the course of the Jenisi (Voyage 

 dans T Altai oriental. Paris, 1845, 4to), contains a list of 

 the plants collected by the author in a portion of the 

 district, part of which had not been previously examined ; 

 when determined by Turczaninow they were found to 

 agree with those of adjacent countries. 



The following were the trees : Larix sibirica, Abies Pichta, Pinns syhes- 

 tris and Cembra, Alnus viridis, Betula alba, Salix Pontederana, pentandra, and 

 stipwlaris Turcz., Popuhis alba, tremula, and laurifolia, and Sorbus aucuparia. 

 The following families and genera have been described (Bull. Moscou, 1845), 

 as forming an addition to Turczaninow's Flora of the Baikal Regions 

 (see the preceding Ann. Rep.) : 1 Adona, 1 Cornm, 6 Caprifoliaceee, 7 

 Rubiaceae, 6 Valerianeae, and 2 species of Scabiosa. 



G. Reichenbach has described some Orchidaceae in 

 Goring's collection from Japan (Bot. Zeit. 1845, p. 333). 



The following divisions of R. Wight's illustrated work 

 upon the flora of Hindostan (Ann. Rep. for 1840) have 

 appeared according to the advertisement : Vol. ii, part 1 

 of the Illustrations of Indian botany, with 39 plates 

 (Madras, 184]); of the Icones plantarum Indiae orien- 

 talis, the conclusion of the first volume, consisting of 16 

 parts and 318 plates; vol. ii, with 318 plates (ib. 1840- 

 42) ; and vol. iii, parts 1-3, with 409 plates (ib. 1843-46). 

 Wight has also published a Spicilegium IN eilgherense, with 

 50 plates (ib. 1846, 4to), in which particular plants of 

 Nielgherry are figured : the latter appears, however, to 



