﻿186 DICOTYL. seu EXOGEN.E. alnus. 



glabri v. rarius puberuli. Folia petiolata, e basi cuneata integra pvato-oblonga, 

 v. rarius ovata, v. ovato-lanceolata, acuta, v. acuminata, v. rarius subobtusa, 

 nunc simpliciter denticulata, dentibus callosis sursum versis, nunc inaequali- 

 ter grosss dentata denticulataque, dentibus erectis, denticulis callosis sursum 

 versis, saspissime glabra et subtus in venarum axillis tantum barbata, junipra 

 rarius pilosula, postea subtus ad venas pubescentia. Petioli graciles, saepissime 

 glabri, rarius pubescentes. Strobili elliptici, in quavis gemma sohtarii v. bini 

 et terni. Nuculas compressae, ovatas v. obovatae , apterae v. ala angustissima 

 coriacea cinctae. — Variat : 



a, lypica, fpliis acutis et rarius obtusis denticulatis utrinque glabris et 

 subtus tantum in nervorum axillis barbulatis. Ad fluvium Delaware in 

 Americae borealis provincia Maryland. A. maritima Nutt. 1. c. A. oblon- 

 gata Regel 1. c. Ramuli petiolique glabri. Folia ovato-oblonga v. obovato- 

 oblonga, denticulis in callum sursum versus acuminatis. 

 $,japonica, foliis saepissime longe acuminatis denticulatis v. inaequaliter 

 dentatis glabris et subtus tantum in nervorurh axillis barbulatis. — In 

 Japonia (Sieb.l, in insula Nippon prope Yokohama, in insula Jesso ad 

 lacum Konoma leg. Maximowicz, in Formosa leg. Oldham. A. japonica 

 Sieb. et Zucc. 1. c. ; Endl. 1. c; Regel 1. c. B. Alnus Thunb. 1. c. A. 

 Harinoki Sieb. 1. c. Ramuli petiolique glabri. Folia ovato-oblonga v'. 

 oblongo-lanceolata, Jentibus in callum sursum versus acuminatis. 

 y, arguta, foliis acuminatis simpliciter v. duplicato-dentatis subtus ad 

 nervos plus minus puberulis. — In Mandshuria austro-orientali (Maxi- 

 mowicz,Schmidt), in insula Jesso ad pedem montis Kumanga-take (Maxi- 

 mowicz) , in insula Nippon prope Yokohama (Oldfield)-. Ramuli petioli- 

 que pubescentes v. serius giabrescentes. Folia ovata vel ovato-oblonga, 

 juniora saepissime pilosula, postea glabrescentia et subtus ad nervos tan- 

 tum plus minus pifosula, inaequaliter v. duplicato-dentata, dentibus ma- 

 joribus acuminatis rectis, dentibus minonbus saspissime in callum sur- 

 sum versus acuminatis. 



§ 2. Amenta foeminea in quavis gemma racemosa. 

 * Nuculae ala suhmembranacea angusta cinctae. 



10. A. hubra (Bong. in Mem. Ac. St-Petersb. ser. 6. vol. 2. p: 162. Veg. de 

 Sitcha) ,' foliis ovato-ellipticis obtuse lobulatis crenatisque. — In insula 

 Sitcba (Bohgard, Mertens, Stewart), Vancouvers island (Lyall) , in Terra Nova, 

 in California, Colonie Ross. (Wrangel),in Rocky mountains (Hall et Hirbour). 

 — Hook. fl. bor. am. vol. 2 p. 158; Miq. Ani). Mus. Lugd. Bat. II. p. 138; 

 Rgl. Bem. ti. Bet. 1. c. p. 430; Spach rev. 1. c. 205 ; Ledeb. fl. ross. vol. 3. 

 p. 656.-, Endl. 1. c. p. 21; Regel Bem. il. Bel. 1. c. p. 429. B. incana y rubra 

 Regel monogr. p. 99. t. 17. hg. 3-4. Arbor(?) ramulis angulatis, fuscis, gla- 

 bris v. junioribus puberulis. Folia magna, petiolata, elliptico-ovata, acula v. 

 obtusa, subtus glaucescentia nervis prominentibus rubris, utrinque glaber- 

 rima v: ad nervbs plus minus puberula. Strobili ovato-elliptici. Variat gem- 

 mis glutinosis folilsque glaberrimis (v. ex Vancouvers island) v. saepius gem- 

 mis parte puberulis foliorum que nervis in pagina inferiore laxe puberulis. 



* * Nuculae apteras v. ala coriacea cinctae. 



11. A. glutinosa (Willd. spec. pl. vol. 4. p. 334), foliis cuneato-obovatis v. subro - 

 tundis utrinque viridibus obtusissimis seepeque relusis. s In Europa, Caucaso 

 Oriente, in Japonia, in Africa australi. — Gaertn. fruct. vol. 2. t. 90; Spach 

 rev. 1. c. p. 201 ; Ledeb. fl. ross. vol. 3. p. 657 ; Endl. 1. c. p. 21. Betula Al- 

 nus glulihosaL. spec. p. 1394. A. barbata C. A. Mey. enum. pl. cauc. p. 43. 

 A. denticulata C. A. Mey. 1. c. p. 43. A. elliptica Req. ann. sc. nat. vol. 5. 

 p. 381. A. glutinosa a, f, £, Regel monogr. p. 103. Arbor ramulis fuscis, 

 glabris viscosisque, v. rarius jUniorihus laxe pilosulis. Folia petiolata, e basi 

 ciineata obdyatav. subrotunda, apice rotundato obtusissima saapeque retusa, 

 v. farissime pauca subacuta, margine duplicato-deritata, v. rariu? subaequali- 

 t,er dehticulata, v. inte"rdum inciso-laciniata,- seepissime glabra stibtus in iier- 



