650 



rtilares, sulco longltnrlinali dehisceiites. F e m. Periffonium nullum. 

 Ovaria snb qiiovis s(juama iJ, sessilia, bilocularia. Nuculae lenticulares, 

 utriiique alatae, abortu uniloculares, monospermae. 



1. B. alha (L. Spec. 13{);j) arborea, foliis rhombeo-triangularibus 

 longe aeuminatis duplicato-serratis glabris , amentis fructiferis longe 

 ])edunculatis pendtilis, lobis s(|uamarum lateralibiis reciirvatis, nuculis 

 ellipticis ala cinctis nucula ipsa duplo latiore apicemque stigmatuin 

 atlingente, 



B. alba. KocH Syn. ed. 2. p. 7C0. — Gorter Fl. ingv. p. 15'2. — Kalm Fl. 

 fennic. No. 540. — Pm.i.. It. I, p. 4. 7. 8. 13. 14. 1(3. 22. 24. 36. 37. 38. 

 112. 113. 118. 121. 183. 1S9. 206. 208. 443; II, p 17. 18. 29. 37. 38. 53. 

 69. 71. 72. 94. 107. 145. 172. 186. 200. 291. 461. 522. 528. 555. 660; ///, 

 p. 21. 191. 193. 211. 228. 238. 273. 301. 304. 322. 325. 346. 436. 461. 492. 

 497. 505. 512. 625. 683. — S. G. Gmel. It. /, p. 19; ///, p. 26. — GEOKGt 

 It. I, p. 234; //, p. 807. — LupECH. It. lll, p. 35. 36. 70. 128. — FiscH. 

 Livl. p. 295. — Falk Bcitr. II, p. 252. — Pall. Fl. ros.9. I, p. 61 (cxcl. 

 vair.). — GtiLDKissT. It. I, p. 65. 93. 275. 286. 424. 455; // , p. 24. 133, 

 232. 262. 275. 279. 281. 283. 287. 290. 298. 321. 326. 327. 329. 330. 338. 

 340. 313. 363. 373. 410. 421. 425. 4.V2. 435. 437. 439. 442. 454. 455. 459. 

 468. — Stepman Fl. viosq. No. 618. — Sii^vers n. nord. Bfitr. VII, p. 263. 

 331. 333. — GKor.ot Deschreib. d. liuss. li. III, 5. p. 1287. — M. a Bieb. 

 Fl. t. c. II, p. 404. — .ToM)z. Fl. lilhuan. p. 287. — Mart. Fl. mosq. 

 p. 171. — Bksskk Enum. p. 37, No. 1233. — Luce Fl. osil. p. 308. — 

 HoFFT Cat. liursk p. 61. — Lkdeb. FI. alt IV, p. 244. — C. A. Meyer 

 Ind. cauc. p. 43. — FKi.rM. Ind. Kola No. 373. — Eicnw. Skiz,-ie p. 128. — 

 Hohenac^;. Enum. ElisalnHhjJol. p. 250. — Fkllim. Ind. Lappon. No. 359. — 

 Ci.AUS Ind. des. in Gobel It. II, p. 307. — VVkimvi. Fl. pelropol. p. 94. — 

 WiR/K^ Fenn. p. 77. — Turcz. Cat. Baikal. No. 1057. — H(ihenack. Enuni. 

 Tiiliisch p. 29. — Flkisch. ct Lindkm. FI. d. Ost.veeproi^. p. 336. — Wirzen 

 Ca.san No. 496. — C. A. Mkyer Beitr. c. l'/Iunz.rnk. d. liuss. R. I, No. 39. 

 — A. Nylaivdi:r Paroec. Pojo. No. 303. — RurRKCHT Fl. Samnjed. cistirul. 

 No. 248 c. var. tol. ii.ajoribiis, tciuiioiibus , clclloideis nei'. rliombci.';). — 

 RupRKCHT Beitr. a. P/lantenk. d. Iluss. It. IV, p. 87. — C. A. Mkyer ib. 

 V, No. 86. 



B. major. Gii.ib. E.verc. ph[ilol. II, p. 400. 



B. |)ciKliiIa. RoTH Tent. Fl. germ. I, p. 405. 



B. veiiiicosa. Emrh. Beilr. I. p. 98. 



B. foiiis aciiminalis scrralis. Gmkl. Fl. sib. I, p. 166, No. 22 (cxcL varr.). 



Bctiila. EiiNDT. Virid. tvarsaw. p. 21. 



/3. intermedla (Waiilemb. Fl. suec. p. 624) foliis siibrodindis, aiiicnlis iitriusqiie 

 scxiis iii apicibiis diversDriim ramiiloium , stjnamorum lobis siibacf|iialibiis. 

 13. Iiiimilis. Hartm. (noii Schra[vk). — Pvuprkcht Fl. Samojed. cisural. 

 No. 247. 



Hab. in Rossia arctica [teriitor. Kola (Fklf.m.), Lapponia (Fellm. , Schrenk 

 in lill.)], scp t en f ri o 1) a I i (J. G. G.fMKL., Pail., Falk) LOstrobolbiiia (F. Nv- 

 LANDKR in litt.), Feniiia (Kalm, Wiiizkn, A. Nvlandkr, Schrenk in lilt.), terr. 

 Samojcd. rcj^. sylvat. (Ruprkcht, Schrenk m litt.)] , mcdia (J. G. Gmel., 

 Pall., Falk) (Pctropoli (Gortkr, Wkinm. , PvUPRECHr), Estbonia (Flkisch. et 

 LiNDKM.), ins. Osilia (F^uck), Livonia! (Fisch., Flkiscii. et Liinpem.), Ciironia! 

 (Fleisch. ct fjNDKM.). Litliiiania ( Gii IB., J UNDz , Eichw.), Wai sawia (Erndt.), 

 VoIIiynia (BiissKi; , Eiciuv.), Tscbcrni^ow (Gui.denst.) , Nouuoiod (Pai.l., 

 Gi':LDE^ST.), Mosqiia (Pall., Guldknst. , Stepiian, Mart.), Wl.idimir (Pall.), 

 Tiila (S. G. Gmkl.), Kursk (Hofft), Tainbow (C. A. Mkvkr), Pcnsa ! (Jacciuet 

 pl. c.rs.\ Saratovv (Pall., Claus), Sinibiisk (Pall. , Claus), Kasan (Georgi, 

 Claus, Wirzen), Wifitka (Pall., C. A. Meykr), Orcnbiir-;- (Pall.)] ctaustrali 

 [austiim vtM-sus iisqne ad Olescliki ex advcrso uibis Cberson ad Borystbenem 

 (Steven 1« lilt.), Kiew (Guldeinst.), Podolia (Besser, Eichw.) , Ucrania et 

 Jckalerinoslaw (Glildenst ), ad Taiiain (Glldenst., Henning) et alibi in terra 

 Cosaccorum (Pall., Gir.DENsr.) , ad Wolf^am pr. Zaritzyii (Pai.l.) ct Sarepta 



