﻿168 DICOTYL. seu EXOGEN.E. bettjla. 



c, Friesii, trunco humili, foliis ramulorum fertilium saepissime e basi 

 cuneata rhomboideis, rarissime e basi dilatata late ovato-rhomboideis , 

 squamarum strobili lobis semper erectis. — In Sueciae montanis alpes- 

 tribusque, in regione uralensi, in alpestribus Bohemiae, Germaniae, Hel- 

 vetiae et Scotiaj, in insula Island. Rgl. 1. c. p. 404. B. glutinosa forma 

 prima Fries summa veg. 1849. p. 556; et ejusd. herb. norm. B. glutinosa 

 Fr. summa veg. 1846. p. 212 et ejusd. forma (ruticosa. B. sylvestris Laest. 

 in Bot. not 1856. p. 107. B. cryptocarpa Laest. 1. c. p. 109. B. subaequalis 

 Laest. 1. c. p. 109. B. subalpina Laest. 1. c. p. 110. B. pubescens var. Carpa- 

 tica Hartig Lehrb. p. 29. B. coriifolia Tausch in herb. Schrad. B. alba 6 

 glutinosa c. carpatica Regel monogr. p. 21. t. 4. fig. 44-52 (excl. 47, 49, 

 51). t. 5. fig. 28-30. t. 6. fig. 10. 11. Arbor humilis v. suffrutescens. Ra- 

 muli glabri , eglandulosi v. novelli pubescentes. Folia ramuiorum ferti- 

 lium glabra v. juniora subtus ad nervos pilosula v. tantum in venarum 

 axillis pilosula, simpliciter v. duplicato-dentata , laete viridia, saepe sub- 

 coriacea. Strobili erecti v. nutantes, elongato-cylindracei v. magis abbre- 

 viati. Samararum ala nucula sesqui-duplo latior v. rarius ea paullo tan- 

 tum latior. — Ludit foliis duplicato-inciso-dentatis. B. Murithii Gaud. in 

 herb. Boiss. » 



t, rhombifolia, trunco elato, foliis ramulorum fertilium saepissime e basi 

 cuneata rhomboideis v. rarius e basi dilatata late ovato-rhomboideis, 

 squamarum strohili lobis lateralibus rectangulis v. recurvatis. — In Europa 

 media et boreali. Rgl. 1. c. p. 404. B. rhombilolia Tausch in Flora ratisD. 

 1838. 2. p. 752. B. glutinosa Wallr. sched. crit. p. 496;- Fries summa 

 veg. 1849. p. 557 forma secunda. B. alba Guimp. d. Holzg. vol. 2, t. 145; 

 Engl. Bot. t. 2198. B. nigricans Wender. Bot. Zeit. 1846. p. 291. B. odo- 

 rata Henze Bot. Zeit. 1848. p. 75; Schrad. herb. B. dahurica Willd. spec. 

 vol. 4. p. 463; Ait. hort. Kew.. ed. 2. vol. 5. p. 299; Schrad. herb. B. 

 pubescens Ledeb. herb., Tausch herb. boh. et auct. div. B. latifolia h. 

 Petrop. B. ambigua Hampe in Reichenb. fl. germ. exsicc. B. macrosta- 

 chya Schrad. herb. B. ovata C. Koch in Linnaea vol. 22. p. 333, et in 

 herb. reg. berol. B. megalocarpa Laest. 1. c. p. 106. B. rustica Laest. 1. c. 

 p. 104. B. alba S glutinosa a rhombifolia, b latifolia (ex parte) et d pen- 

 dula Regel monogr. p. 20, 21, 23, fig. 33 et 40-43. Ramuli tandem gla- 

 bri, novelli saepe pius minus pubescentes. Folia juniora saepe pilosula, 

 deinde glaba v. pagina inferiore in axillis venarum parce barbata, sim- 

 pliciter v. duplicato-dentata. — Ludit foliis e basi cuneata rhomboideo- 

 ovatis (B. alba glutinosa rhomboidea Regel, 1. c. p. 20), v. e basi di)alata 

 v. rotundata late rhomboideo-ovatis (B. alba glutinosa b latifolia Regel, 

 1. c. p. 21); ramis erectis v. pendulis (B. alba glutinosa d pendula 

 Regel 1. c. p. 23),strobi!iserectis v. pendulis, squamarum lobis lateralibus 

 rectangulis v. recurvisv. rarius inuno eodemque strobilo magis porrectis, 

 samararum ala nucula sesqui usque duplo v. rarius paullo tantum latiore. 



I, carpatica, trunco humili suffrutescente, cetera ut antecedentis. Hab. 

 in Siuecia, Norwegia, in Sudetis, in montibus Hercyniae. Bgl. 1. c. p. 404. 

 B. carpatica Waldst. et Kit. teste Willd. spec. pl. vol. 4. p. 464, et Willd. 

 in herb. reg. berol.; Reichenb. ic. fl. germ. vol. 12. t. 624. fig. 1284, et 

 ejusd. fl. exc. p. 174; Mossl. Handb. 4. p. 1765. B. carpatica (5 hercynica 

 Reichenb. ic. fl. germ. vol. 12. t. 624. fig, 1286. B. ovata, sylvalica, rus- 

 tica, media et megalocarpa Laest. in Bot. Not. p. 106, etc. B. tiliasfolia 

 Laest. 1. c. p. 107 (forma foliis ramulorum sterilium cordatis acutis). B. 

 pubescens Koch syn. fl. germ. ed. 2. p. 761 {forma samararum ala nucula 

 ' paullo tantum latiore). B. alba p pubescens Tausch. herb boh. (ramulus 

 sterilis). B. alba 3 glutinosa c carpatica Regel monogr. p. 21. Ramuli, 

 folia, squamae amentorum samaraque variant omnino ut in antecedente. 

 Folia subtus in venarum axillis sa?pe barbata. 



Subspecies VIII, torluosn, trunco humili, ramulis tortuosis, petiolis folium 

 dimidium circiter aequantibus, samarae alis nuculam circiter aequantibus. 

 S ln montanis Sibiriae, Europae et in Rossia boreali. Rgl. Anm. ii. Bet. in 

 Bull. Mosc. 18. p. 404. B. tortuosa Ledeb. fl. ross vol. 3. p. 652. B. Davurica 

 Ledeb fl. alt vol. 4. p. 245. excl. syn. B. tortuosa Regel monogr. p. 30 exc). 



