SALICACEAE. — POPULUS 35 



adenopoda Maximowicz and in other species. With regard to it and to the flowers 

 I would be inclined to refer P. Gamblci to sect. Leuce, but Dode says that it is 

 most nearly related to P. yunnanensis Dode, of which I know living plants, and 

 which certainly belongs to sect. Tacamahaca. Gombocz (in Math. Termesz. 

 Kozl. XXX. 156 [1908]) knew these species only from the descriptions of the 

 authors. That of P. Gamblei being insufficient, I add a more complete one. 



Arbor, ut videtur satis alta; ramuli annotini ut videtur glabri sed intcrdum villo- 

 euli ; turiones (ex Dode) 5-angulati. Folia ramulorum fructiferorum ovato-lanceolata, 

 basi subcordata v. truncata v. subtrapezoidea, apice breviter v. longius acumi- 

 nata, margine distanter sinuoso-dentata, subtus (ex Dode) albescentia, glabra, 

 maxima ad 15.5 cm. longa et 9.5 cm. lata, v. (ex Haines) subtus valde pubescentia 

 villosave, basi cordata, ad 33 cm. longa et 25 cm. lata; petioli foliorum glabrorum 

 }/i-]4: laminis longi, ut videtur glabri, foliorum pubescentium (ex Haines) bre- 

 viores, crassiores, pubescentes. Amenta mascula ad 8 cm. longa, rhachi pilosa; 

 bracteae lanceolatae, basi attenuatae, apice acutae, saepissime plusminusve in- 

 cisae, brunneae, margine satis dense longe ciliatae, facie glabrae v. pilis paucis 

 longis praeditae, ad 7 mm. longae; flores pedicello distincto piloso suffuliti; discus 

 oblongus, margine crenulato-lobulatus, ciliatus et extus pilosus, intus glaber; 

 Btamina 12-20, filamentis tenuibus glabris quam antheras purpureas subglobosas vix 

 V. paulo longioribus; amenta feminea tantum fructifera visa, circiter 10 cm. longa, 

 rhachi pilosa; bracteae mihi ignotae; ovaria subsessilia, matura ad 11 mm. longa, 

 e basi ellipsoidea oblongo-linearia, glabra, 2-carpellaria (ex Dode 2-4-valvata), basi 

 perianthio piloso irregulariter inciso cincta; stigmata non vidi. 



12. Populus laurifolia Ledebour, Fl. Alt. IV. 297 (1833) excl. syn. Gmelinii; 

 Icon. Fl. Ross. V. t. 479 (1834); Fl. Ross. III. pt. 2, 629 (1850). — Fischer in Allg. 

 Gartenzeit. IX. 404 (1841); in Bull. Acad. Set. St. PHershourg, IX. 347 (1842). — 

 Dippel, Handh. Laubholzk. II. 208, fig. 103 (1892). — Koehne, Deutsche Dendr. 85 

 (1893). — Schneider, III. Handh. Laubholzk. 1. 16, fig. 5 m-n, 6 v-y (1904).— 

 Dode in Mem. Sac. Nat. Hist. Autun, XVIII. (Extr. Monog. Ined. Populus, 59, t. 12, 

 fig. 94) (1905). — Ascherson & Graebner, Syn. Mitteleur. Fl. IV. 47 (1908).— 

 Gombocz in Math. Termesz. Kozl. XXX. 102 (Monog. Gen. Populi) (1911).— 

 Henry in Elwes & Henry, Trees Gr. Brit. & Irel. VII. 1842, t. 410, fig. 30 (1913). 



Populus balsamifera Pallas, Fl. Ross. t. 41, fig. B (non Linnaeus) (1784). 

 Populus balsamifera, var. 2, viminalis Loudon, Arb. Brit. III. 1673 (1838), 



excl. syn. Fischer. — Wesmael in De CandoUe, Prodr. XVI. pt. 2, 330 



(1868). 

 Populus balsamifera, var. laurifolia Wesmael, 1. c; in Mem,. Soc. Sci. Hainaui, 



III. 246 (Monog. Populus, 66) (1869). 



Populus Lindleyana Carri^rein Rev. Hort. XXXIX. 380 (non Booth) (1867). — 

 Dode in Mem. Soc. Nat. Hist. Autun, XVIII. (Extr. Monog. Ined. Populus, 

 59) (1905). 



Populus laurifolia, var. viminalis Dippel, Handb. Laubholzk. II. 209 (pro parte) 

 (1892). 



Populus laurifolia, var. Lindleyana Ascherson & Graebner, Syn. Mitteleur. Fl. 



IV. 47 (1908). 



WESTERN SIBERIA. Prov. Tomsk : Altai Mts., near Alexandrofka, 

 June 6, 1911, C. A. Meyer (No. 783). 



As far as I know this species has been collected only on the Altai Mts. The 

 leaves of the young shoots and offshoots are rather narrow-oblong with a roundish 

 or obtuse, rarely subcordate base, gradually tapering into an acute or shortly acu- 

 minate apex. These long leaves measure between 10: 3 and 15: 6 cm., have a narrow 

 glandular serrature and are borne on short petioles from 8-15 mm. long. The shape 



