388 S. Korshinsky, 



Amur superiorem in decliviis apricis et in sylvis collucatis crescit 

 atque ad Kumaram sat frequens est, tamen NW versus magis ma- 

 gisque rarescit. Prope Albasin, Permikina, Czernjajewa, Kumara, 

 Blagowesczensk, Sojuznaja, Blagoslowennoje et Babstowa coll.; 15 

 Maji fl.; 1 Jul.— 31 Aug. fr. imm. 



486. C. rostrata Ait. 



var. mandshurica Rgl. fl. ussur. p. 129; DC. Prodr. 

 v. XVI, pare II, JIB 133. 



Hab. in sylvis frondosis ad Amur medium a Chingan orientem 

 versus prope Babstowa, Bidshanskij, Chabarowka, Kasakewiczewa; in 

 valle inundata fl. Burejae prope Bacharewa; specimina sterilia tantum 

 vidi. 



487. Quercus mongolica Fisch.— Ledb. Fl. ross. v. Ill, p. 589; 

 Turcz. baik.-dah. v. II, ft 1065. 



Omnium arborum ad Amur medium frequentissima, in planitiebus 

 collibusque necne in valle inundata silvas non condensas arboribus 

 formans; in sylvis collucatis ubique crescit, sed in primaevis, scilicet 

 umbrosis, prorsus deesse videtur. Aequo modo ergo umbrifuga apparet, 

 ut Quercus pedunculata nostras. Ad Amur superiorem parcius occur- 

 rit, in eollibus, ad silvarum margines et praecipue in valle inundata 

 crescens. Prope Albasin, Tolbusino, Czernjajewa, Bidshanskij, Bab- 

 stowa, Chabarowka, Polowinnaja et Kasakewiczewa coll. 23 Maji 

 nondum fl.; 27-28 Maji fl.; 7—24 Jun. defl.; 27 Aug. fr. 

 Betulaceae. 



488. Betula alba L. — Rgl. in DC. Prodr. v. XVII, pars II, 

 p. 162; Ledb. Fl. ross. v. Ill, p. 650; Turcz. baik.-dah. v. II, 

 ft 1056. 



var. typica Trautv. in Maxim. Prim. p. 249. (var. ver- 

 rucosa Rgl. 1. c). 



Hab. in locis montosis, plerumque cum Larice dahurica. Per 

 totam regionem amureusem distributa, hie inde copiose, plerumque 

 rara. Prope Pokrowka, Albasin, Pennikina, Czernjajewa, Kumara, 

 Suchotino, Blagowesczensk, Michailowskoje, Bacharewa, Bidshanskij, 



