﻿BETULA. BETULACEtE (AUCTOR E. REGEL). 163 



puberuli. Folia petiolata, e basi cuneata ovato-rhomboidea, v. rarius e basi 

 truncata v. subcordata ovata, v. cordato-ovata, v. cordato-subrotunda, acuta, 

 v. acuminata , v. cuspidata, v. rarissime subobtusa, simplieiter v. duplicato- 

 denta^a , v. rarhis sinuato-lobata, v. incisa, v. pinnatifida, ramulorum steri- 

 lium (pracique speciminum juveniliumj saepe pubescentia, v. subtus resinoso- 

 punctata, ramulorum fertilium saepissime glabra, v. subtus in venarum axillis 

 barbata. Amentamasc. elongalo-cylindrica, nutantia, glabra v. pubescentia. 

 Amenta fem. strobiliformia, erecta v. pendula, cylindrica, glabra v. pubes- 

 centia, pedunculata; squamae trilobfe; lobi laterales, erecti v. divergentes v. 

 recurvati, saepissime lobo intermedio majores. 



Subspecies I, verrucosa, ramulis fructifefis glabrisv. parce glanduliferis, foliis 

 ramulorum fertilium e bast cuneata v. dilatato-cuneata rbomboideo-ovatis acu- 

 minatis , samarae alis nucula duplo triplove latioribus , squamarum strobili 

 lobis divarftatis v . recurvatis. ,f vel 5. In Europa et in Asia media. Regel, 

 Bemerkungen iiber Betula u. Alnus in Bull. de la soc. d. Mose. 18. p. 397. B. 

 alba L. 1. c. (foliis ovatis acuminatis serratis); Willd. spec. pl. 4. p. 462, ejusd. 

 Berl. Baumz. 1. 52; Ledeb. fl. ross. v. 3. p. 650; Ait. hort. Kew. ed. 2, 

 vol. 5. p. 298; Trautv. et Mey. in Midd. fl. Och. p. 83; Koch syn. fi. germ. 

 ed. 2p. •J60; Du Roi Harbk. Baumz. v. l,p. 82; Dietr. fl.bor.vol.il. t. 787; 

 Henze in Bot. Zeitung 1848. p. 75; Hartig Lehrb. t. 27. B. alba et alba 

 verrucosa "Wallr. sched. crit. p. 494 et 495. B. alba 1 alba a-d Laest. in Bot. 

 Not. 1856. p. 103. B. alba <x et y Endl. 1. c. p. 19. B. alba a vulgaris et 

 V verrucosa Regel, monogr. p. 17 et 19. t. 4. fig. 1-8. 18. 30-32. B. 

 alba vulgaris Spach 1. c. p. 186. B. alba typica Trautv. in Maxim. prim. 

 fl. amur. p. 249. B. verrucosa Ehrh. Beitr. 6, p. 98; Fries summa veg. 

 1. p. 211; Bechst. Forstb. p. 234. B. gummifera Bert. fl. it. v.10, p. 229. 

 B. odorata Reichenb. ic. fl. germ. t. 626. fig. 1288 (nec Bechst). B. rhom- 

 bifolia Tausch in Flora ratisb. 1838 p. 752. Ramuli steriles e basi trunci 

 -egredientes v. speciminum juvenilium saepissime dense glanduliferi , v. 

 rarius eglanduliferi. Folia ramulorum fertilium glabra, v. subtus saepe 

 resinoso-punctata, e basi cuneata v. dilatato-cuneata rhomboideo-ovata, plus 

 minus acuminata , simpliciter v. duplicato-dentata , v. rarius subsinuato- 

 lobulata dentataque , v. rarissime pinnatifido-laciniata; folia ramorum sterilium 

 e basi trunci, egredientium (turionum) speciminumque juvenilium sterilium 

 e basi truncata v. subcordata v. rotundata deltoideo-ovata , v. subcordato- 

 ovata, plus minus acumioata, margine dentata v. saspius sinuato-lobulata, 

 subtus plerumque dense glandulosa. Petiolus folium dimidium subaequans 

 v. paullo longior. Amentorum fem. masculorumque squamas glabrae v. rarius 

 margine breviter piloso-ciliolatae. Strobilus cylindricus. Variat: 



a., vulgaris, trunco excelso, foliis ramulorum fertilium e basi cuneata 

 v. rarius cuneato-dilatata rhomboideo-ovatis. — J I n sylvis Eu- 

 ropae mediae et borealis frequens, in Asia media rarius occuirit, ut in 

 montibus Alatau (Schrenk) , ad fluvium Angaram (Turczaninow) , ad 

 Schilkam (Maximowicz) , in montibus insulae Nippon (Maximowicz), in 

 montibus Armeniae (Kotschy), et in Cappadocia. B. alba ct vulgaris Regel, 

 monogr. p. 17. t. 4. fig. 1-7. 10. 13. 14. 16. 18. Cfr. syn. supra 

 cit. — Haec ludit: 1° expansa (Regel, monogr. p. 18), ramis ramulisque 

 erectis. B. alba aetherea Wallr. sched. crit, p. 494. B. alba macro- 

 carpa Wallr. 1. c. B. alba a Ait. hort. Kew. ed. 2. vol. 5, p. 299. B. 

 alba 1 alba a. b. c. Laest. 1. c. B. odorata Bechst. in Reichenb. 1 c. — 

 2° pendula, ramis deflexis vimineis pendulis. B. alba pendula Willd. 

 spec. pl. v. 4. p. 462 ; Wallr. sched. crit. p. 494. B. alba 1 alba d pen- 

 dula Laest. 1. c. p. 104. B. media Laest. 1. c. p. 107. B. pendula Hoffm. 

 fl. germ. p. 334. B. alba a vulgaris lus. 2 pendula Regel, monogr. 

 p. 18. B. alba var. pendula Tausch herb. boh. — 3° microphylla, foliis 

 parvis. Habitat in montibus altiorihus Germaniae et Italiae, cultaque in 

 hortis. B. alba microphylla Wallr. sched. crit. p.495. B. ethnensisRaf. 

 inherb. Cand. etc. B. Sokolowii H. Petr. B albaa vulgaris lus. 3 micro- 

 phylla Regel, 1. c. Folia e basi cuneata deltoideo-ovata, lamina 4-1 P°U- 

 longa. Folia et ramuli omnino glabri. — 4" lobulata, foliis grosse sublo- 

 bulato-dentatis , dentibus acuminatis dentatis. In Suecia, cultaque in 



