SALICACEAE. — POPULUS 29 
acumen producta, toto circuitu glanduloso-crenata, glabra, ad 9 cm. 
longa et 10 cm. lata; petioli 4-5 cm. longi, plus minusve compressi. 
15. P. nigra, var. italica. 
ti Folia subtus concoloria v. discoloria, superne stomatibus haud praedita, 
turionum et ramorum plus minusve diversa, forma variabilia. Gemmae 
non viscosae, glabrae v. pubescentes ...... Sect. 5. LEUCE. 
Folia turionum subtus tomento albo persistente obtecta, margine lobata 
v. irregulariter lobato-denticulata, ramorum fructiferorum saepe gla- 
brescentia et viridescentia, crasse papyracea. Gemmae plus minusve 
pubeéscénteS . ... 1 0 ee Subsect. ALBIDAE. 
Folia turionum plus minusve palmato-lobata, ramulorum fructiferorum 
subtus vix glabrescentia, plus minusve cinerea, satis parva. 
16. P. alba. 
Folia turionum irregulariter lobato-duplicato-dentata, ramulorum fruc- 
tiferorum saepe valde glabrescentia, viridescentia, satis magna. 
17. P. tomentosa. 
tt Folia turionum subtuscinerea, pubescentia v. deinde glabrescentia, margine 
breviter dentieulata, ramulorum fructiferorum sericea v. glabra, saepe 
glaucescentia, membranacea tenuiter papyracea. Gemmae saepis- 
mne ghran . —— (1 I Lus Subsect. 'TREPIDAE. 
Folia ramulorum fructiferorum distincte longe acuminata. 
18. P. adenopoda. 
Folia ramulorum fructiferorum obtusa, acuta v. breviter acuminata. 
Folia ramulorum fructiferorum late ovata v. ovato-rotunda, basi sae- 
pissime subito in petiolum brevem producta, saepissime glanduli- 
fera, apice breviter acuminata mend — satis "eri et 
regulariter glanduloso-serrulata (dentibus pro 1 cm. circiter 3). 
z i 4 19. P. Sieboldii. 
Folia ramulorum fructiferorum saepissime suborbicularia, basi rotun- 
data v. pleraque truncata v. plus minusve cordata, rariter glan- 
dulifera, apice obtusa v. acuta v. breviter acuminata, margine 
sinuato-glanduloso-dentata v. eroso-crenulata, dentibus satis 
remotis circiter 1-2 pro 1 em. à 
Folia ramulorum fructiferorum basi nunquam cordata, rariter ro- 
tunda, sed saepissime truncata, apice obtusa v. acuta. Amenta 
fructifera vix plus quam 12 cm. longa . . . 20. P. tremula. 
Folia ramulorum fructiferorum basi saepe plus minusve cordata et 
apice acuta v. breviter acuminata. Amenta saepe plus quam 12 
em; longa... «v... ere doce a, I POOMAGONG. 
ENUMERATIO SECTIONUM SPECIERUMQUE ASIAE ORIENTALIS 
NEC NON HIMALAYAE. 
Sect. 1. TURANGA Bunge in Mém. Sav. Étr. Acad. Sci. St. Pétersbourg, VII. 
498 (A. Lehmann. Rel. Bot. 322) (1851). — Gombocz in Math. Termesz. Közl. XXX. 
67 (Monog. Gen. Populi) (1908). 
Populus, subgen. Turanga Dode in Mém. Soc. Hist. Nat. Autun, XVIII. 
(Extr. Monog. Inéd. Populus 13) (1905). 
Folia polymorpha, utrinque cinereo-glauca et stomatibus numerosis praedita et 
distincte reticulata, satis coriacea, basi glandulis vix v. haud prominentibus mu- 
nita; petioli plus minusve rotundi. Gemmae haud v. paullo viscosae. Disci florum 
