﻿betula. BETULACEiE (auctor e. regel)." 1 65 



rarius dilatato-cuneata rhomboideo-ovata, longe cuspidata, argute duplicato- 

 dentata, juniora resinoso-punctata, caeterum glaberrima. Folia ramulorum 

 sterilium (turionum) e basi truncata v. rotundata v. subcordata deltoideo- 

 ovata longeque cuspidata. Squamae strobili dense imbricatae, sub lente vix 

 puberulae ; lobus intermedius saepissime abbreviatus. 



Subspecies ITI, mandstauricu, trunco arboreo elato, ramulis fructiferis glabris 

 v. parce glanduliferis, foliis ramulorum fertilium e basi dilatato-cuneata del- 

 toideo-ovatis acuminatis duplicato-dentatis glabris, samarae alis nuculam cir- 

 citer aequantibus v. ea paulo latioribus, strobili squamarum lobis lateralibus 

 vectangulis. ^f Ad sinum Olga in Mandshuria australi (Schmidt). RgL Bem. 

 Bet. in Bull. de Mosc. 18. p. 399. t. 7. fig. 15. Ramuli in speciminibus exami- 

 natis glandulis raris adspersi. Folia subtus eximie reticulato-venosa, glaber- 

 rima. Strobili squamarum lobi laterales rectanguli, breves, oblique truncati, 

 lobo intermedio lineari-oblongo. 



Subspecies IV, latlfolia, arborea, ramulis fructiferis glabris v. parce glandu- 

 liferis, foliis ramulorum fertilium e basi truncata v. rotundata v. cordata sub- 

 rotundis v. cordatis parce acuminatis subtus in axillis venarum barbatis, 

 samarae alis nuculaduplo triplove latioribus, strobili squamarum lobis latera- 

 libus divaricatis et saepe recurvis. s In Asia media et boreali. B. latifolia 

 Tausch in Flora ratisb. 1838. p. 751. B. alba !; papyrifera Spacb 1. c. p. 183 

 ex parte; Endl. 1. c. p. 19 ex parte; Regel, monogr. p. 23 ex parte et 

 t. 5. fig. 8. 10. 11. 12. Subspeciei pubescenti maxime affinis, glabritie ramu- 

 lorum juniorum samararumque ala. latiore dignoscitur. — Folia ovato-subro- 

 tunda, plus minus acuminata, duplicato-dentata, subtus ad nervos plus minus 

 pilosa et ad eorum axillas saepius insigniter, rarius vix barbata, juniora subtus 

 resinoso-punctata. Strobili cylindrici, nunc elongati et saepe apice attenuati, 

 nunc abbreviati; squamae sub lente praecipue margine pilosulee. Haec variat : 



a, Tauschii, strobilis elongato-cylindraceis. — In Japonia, in insula Jesso 

 prope Siginopi et circum montem Kumaga-taka in planitie (Maxim.), 

 in Mandshuria, ad fluv. Ussuri (Maxim.), prope Dundas et May in Mandsh. 

 austro-orientali (Maxim.), in regione amurensi (Maxim. et Radde), in Si- 

 biria, prope Nasimovo (Middend.) , ad litora partis australis lacus Baical 

 (Radde), cultaque in hortis. Rgl. Bem. iiber Bet. in Bull. de Mosc. 18. 

 p. .399. t. 7. fig. 11-14. B. alba Miq. in Ann. bot. Mus. lugd. bot. 2. 

 p. 136. — Folia crassiora subpergamacea. Strobili apice attenuati v. ob- 

 tusi, erecti v. nutantes; squamarum lobus intermedius abbreviatus, lobis 

 lateralibus brevior. 



[3, kamtschatica , strobilis cylindraceis abbreviatis. Crescit in Kamtschatka 

 (Rieder, Stewart). Rgl. 1. c. p. 400. t. 7. fig. 16-20. Folia tenuiora. Stro- 

 bili clrciter | poll. longi et 8 poll. in diametro; squamarum lobus inter- 

 medius brevissimus. 



Subspecies V, occidcntalls, arborea, ramulis fructiferis glabris v. parce glan- 

 duliferis v. junioribus laxe pilosulis et mox glabris, foliis ramulorum fertilium 

 e basi rotundata ovato-oblongis v. ovatis acuminatis subtus in axillis venarum 

 barbatis, samarse alis nucula duplo triplove latioribus, strobili squamarum 

 lobis lateralibus divaricatis v.recurvis. — InAmerica boreali. B. occidentalis 

 Hook. fl. bor. am. 1. p. 155; Regel monogr. p. 73. Ramuli brunnei, nunc 

 totidem glabri, nunc glandulis adspersi, juniores pilosuli et mox glabrescentes. 

 Folia duplicato-dentata, subtus ad nervos plus minus pilosa et ad eorum 

 axillas insigniter barbata, juniora subtus resinoso-punctata. Strobili cylin- 

 drici, elongati, saspe apice attenuati rarius obtusi, erecti v. penduli, squa- 

 marum sub lente pilosularum lobus intermedius abbreviatus et lobos latera- 

 les aequans v. superans. Variat : 



a, typica, trunco humili, foliis inciso-sublobatis dentatisque. S In Ame- 

 rica boreali-occidentali, Straits of the Fuca (Scouler), Rocky mountains 

 (Dougl. et Drummond). Rgl. Bem. iiber Bet. in Bull. de Mosc. 18. p. 400. 

 t. 7. fig. 1-5. B. occidentalis Hook. 1. c; Rgl 1. c. t. 15. fig. 35. Ra- 

 muli glanduliferi. Strobili squamarum lobus intermedius lobos laterales 

 aequans v. superans. 



