330

DICOTYL. seu EXOGENiE.

POPULUS.

lagineis subciliolatis. In America sept.: Terra Nova (La Pylaie, h. DC.I),Connecticut (Oakes, h. DC.!),mont. AHeghanies (Rafm. h. Petrop.!),lacumWinipeg et flum. Saskatchawan (Bourg. h. And.!); in Sibiria adKatn-schatka (Rider h. Petrop.!, Stnbendorff id.). P. balsamifera Midiiarb. 3. p. 306, t. 13, n° 1; Nouv. Duh. 2. t. 50. P. Tacamahaca Mill,dict. 6, p. 97. P. viminea Bon Jard. 1845, p. 565 ? — Variat : foliis ti-riegatis (Mill; Loud. Encycl. p. 830). (v. v. c.)

p, suaveolens (Loud. Encycl. p. 830), arbor ramis cylindricis, foliis 1*ellipticis acuminatis obtuse dentatis petiolo nervisque praecipuis subpu-bescentibus. In America sept.iRocky Mount. (Hali et Harbour, h. DC.!j;inSibiria (Schenk, h. Petrop.!; Stubendoff, h. Petrop.!), ad torrentemTerekty (Kar. et Kir. h. Petrop. et DG.!), ad flum Amur (Maximow., b.Petrop.!); ad Baicalem australem (h. Ledeb.!), in Kamtchatka (h. Re-gel!). P. macrocarpa (Schrenk! enum. piant, nov. 1842. p. 16, Scbrentin h. Petrop.!). (v. v. c.)

Y, laurifolia, ramis angulosis junioribus subpilosis, foliis ovalibus oMn-gisve plus minus longe acuminatis vel lanceolatis nunc subcordatis den-tatis junioribus subpilosis. In Sibiria : ad Ulban (Ledeb. h. Regell), adripas Ulba, Uba, Irtysch, Buchtorma(Led. fl. Alt. p. 297), in mont. Allii(Ledeb.! h. Vindob. et DC.). P. laurifolia Ledeb. icon. fl. ait. t.479. (v. s.sp. et c., v. c.)

S, viminalis (Loud. Encycl. p. 830), ramis angulosis elongatis gracilibusflexuosis, foliis longe lanceolatis. P. viminalis Lodd. cat. ed. 1836.P.Lind-leyana Boolh in Rev. hort. 1867. p. 380. P. salicifolia hort. P. IougifoliaPali. Ross. t. 41. B. (v. v. c.).

16. P. SiMomi (Carr. in Rev. hcrt. 1867. p. 360), foliis coriaceis crassis sub-erectis breviter petiolatis valde irregulariter ovato-ellipticis utrinque aequali-ter attenuatis dentibus crispatis subarcuatis brevibus utrinque glabris supraintense viridibus subtus albido-giaucis subcereis. -f In China (Eug. Sin*].Arbor elata, ramis patulis elongatis, cortice rufo-brunneo, lenticellissparsisalbidis linearibus lineam longis, angulis quinque validis subaliformibus pur-purascentibus. Gemmae parvae, eiongalae, valde adpressas, intense rufe,lucidas, viscosae. Folia 5-6 poli, longa, 3-3 \ poli, lata, petiolo 9-10 lia-crasso, canaliculato, supra et inde medium usque limbi purpurascente.Amenta ign.

17. P. candicans (Ait. Hort Kew. 3. p. 406), gemmis glabris viscosis, ramis ter-minalibus angulosis teretibus, foliis cordatis deltoideis vel ovalibus basi trun-catis vel rotundatis acuminatis acerosis inaequaliter dentatis saepius sufit»puberulis lanceolatis chartaceis. ;■> in Canada (Spach Hist. Veg.; Ser. »■Jard. 2, 63), Massachusetts, New Hampshire, Rhode Island (Mich. fil. a™-”;p. 308).— Mich. f. Arb. 3. t. 2. f. 2; Willd. arb. 231, Sp. piant. 4. P-Spach hist. Veg. 10. p. 392; Seringe fl. jard. 2. p. 62- P. nigra Cat»Carol. 1, f. 34. P. macrophylla Lindi, enc. p. 840. P. Ontariensis i»Hort. par. P. Canadensis Moench Weiss. 81. P. latifolia Mosnch metu, u»P. Acladesca et P. heterophylla hort. ex Koch Wochens. 1805, P-Cortex griseus, in vetustis arboribus rimosus; ramuli tenuiter pubescentigemmae elongato-conicte, acutae, brunneo-luteae. Folia juniora utrinque puwcentia; adulta quam latitudo multo longiora, dentibus obtusis apice cilia,supra intense viridia, subtus pallide alba, nervis subtus rufescentibus, ltiolo 1 t .-3 poli, longo, depresso, pubescente, juniore 2 -glanduloso. ABinasc..., fem. foliis multo praecociora, pedunculata, in anthesioblongo-cylindracea, obtusa, densissima, bracteolis caducis, glabris,

tis. Stigmata reniformi-2-loba, ovario latiora. Cupula cyathiformis, ere •Amenta fructifera, 4-5 poli, longa. Capsula ovato-pyramidalis, obtusa,siuscula, circiter 2 lin. longa (v. v. c.).

18. P. thichocarpa (Torr. et Gray, in Hooker Icon, piant., vol. 5. t. 878);sublonge petiolatis cordato-triangularibus serratis glabris subtus Pr 10 jr jjsnute reticulatim venosis, amenti feminei squamis laciniatis villosis, ^globosis dense tomentosis, stigmatibus insigniter basi lobato-dilatatis.p

ad Santa Clara River, prope Beneventano, Californise.