— 190 — 



no. 494 (1892)— BURKILL in Journ. Linn. Soc. XXVI (Hemsley, Ind. 

 Fl. Sin. II), p. 537 (1899), pro parte, excl. var.— Komarov in Acta Hort. 

 Petrop. XXII (Fl. Mansh. II), p. 15 (1903), pro parte— Nakai in Journ. 

 Coll. Sci. Tokyo XXXI (Fl. Koreana II), p. 212 (1911). 



Popidus tremula var. Davidiana Schneider in Sargent, PI. Wils. 

 Ill, p. 24 (1916)— Nakai, Veg. Diamond Mts. p. 168, no. 160 (1918) ; 

 in Tokyo Bot. Mag. XXXIII, p. 198 (1919)— Mori, Enum. Corean PI. 

 p. 108 (1922)— Rehder in Journ. Arnold Arb. IV, p. 137 (1923) ; Man. 

 Cult. Trees p. 85 (1927). 



Arbor dioica usque 15-20 metralis alta, trunco usque 1 metralis 

 lato, cortice fuscescenti-cinereo longitudine fisso. Rami diametro infra 

 10 cm. vulgo cortice cinereo-viride non fisso. Ramuli juveniles glabri 

 virides vel parce rubescentes. Gemmae fuscae viscosae 5-8 cm. longae 

 squamis imbricatis obtectae glabrae, florum late ovoideae, ramorum 

 ovato-lanceolatae. Gemmae et folia juvenilia viscidula suaveolentia. 

 Stipulae lanceolatae vel lineari-lanceolatas 3-6 mm. longae glabrae caducae 

 rubescentes. Petioli glabri basi supra sulcati supra medium laterali 

 compressi 0,6-4,5 cm. longi virides vel apice rubescentes. Lamina 

 foliorum ovali-rotundata vel depresso-rotundata vel late ovata 2 5,7 cm. 

 longa 1,5-5 cm. lata supra viridis infra glaucescens, basi truncata vel 

 obtusa vel leviter cordata apice obtusiuscula vel infra margine crenato- 

 dentata parce hirtella dentibus utrinque 7-13. Amenta praecocia sessilia 

 vel brevi-pedunculata. Squamae gemmarum 4-5 rotundatae convolutae. 

 Axis amentorum pilosella. Cataphylla nulla. Amenta mascula 5-9 cm. 

 longa. Bracteae subpersistentes unguibus 2 mm. longis, limbis 4-5 mm. 

 longis rotundatis flabellato-laciniatis nigris. Perigonium oblique tur- 

 binatum albidum 2,5-3 mm. longum. Stamina 6-11 dorsi-ventrali 

 subserialia. Antherae rotundatas purpurea? persistentes. Amenta 

 f aeminea 4-7 cm. longa. Axis pilosella. Bracteae caducae 3 mm. longae 

 apice flabellatim expansae et laciniatse nigrescentes margine sericeo- 

 hirtellae basi subito in ungues subulato-virides contractae. Perigonium 

 turbinatum obliquum 2 mm. longum albidum. Ovarium ovoideum 2,5 

 mm. longum viride. Stigmata 2-3 cristato-laciniata. 



