248 WILSON EXPEDITION TO CHINA 



Pedicellorum pars superior parte inferiore plus minusve aequilonga v. brevior. 



Inflorescentia fasciculata, 10-15-flora; perigonia in facie partesque superi- 



ores pedicellorum fere glabra. Samarae maturae lanceolatae, circiter 



1-1.2 cm. longae. Folia (fide Brandis) ovato-oblonga, 4-11 cm. longa, 



glabra 2. U. villosa. 



Inflorescentia fasciculata (fide Hance) 5-9-flora ; perigonia in facie et pedi- 

 cellorum partes superiores plus minusve distincte puberulae. Samarae 

 maturae circiter 2.5 cm. longae. Folia ramulorum f ertilium rhomboideo- 

 subrotunda, ad 5 cm. longa, subtus pilosa et barbata. 



3. U. macrocarpa. 



Samarae maturae undique glabrae Ser. b. Euglabrae. 



Inflorescentia plus minusve elongato-cjTiiosa; pedicellorum pars superior 

 parte inferiore pilosa v. perigonio saepe ad 2-23^-plo longior v. sama- 

 rarum maturarum stipites distincti perigonio circiter duplo longiores. 

 Folia satis lanceolato-elliptica, circiter 2J^-plo longiora quam lata; 



petioli circiter 1 cm. longi 4. C/. Brandisiana. 



Inflorescentia fasciculata (v. in 17. Bergmanniana et U. Uyematsui paulo 

 elongata) ; pedicellorum pars superior parte inferiore pilosa v. pergionio 

 vix longior v. subbrevior. Samararum maturarum stipites perigonio 

 breviores v. rarius in U. Bergmanniana var. lasiophylla longiores. Petioli 

 plerique breviores. 



Pedicelli fructiferi toti 5-7 mm. longi 5. U. Uyematsui. 



Pedicelli fructiferi toti 2-4 mm. longi. 



Samarae late obovatae v. obovato-rotundae. Hamuli annotini brunnei 

 v. rubro-brunnei, etiam hornotini glabri v. perulae gemmarum dorso 

 glabrae. Folia obovato-oblonga, obovato-elliptica v. elliptica. 



6. U. Bergmanniana. 

 Samarae elliptico- v. obovato-oblongae v. elliptico-rhomboideae. Ra- 

 muli hornotini annotinique fere semper pilosi, saepe scabri v. gem- 

 marum perulae in dorse pilosae v. folia distinctius obovata v. apice 

 3(-5)-lobata. 

 Hamuli novelli plus minusve hirsuti v. annotini distincte brunnes- 

 centes. Folia ramulorum fructiferorum nunquam apice trilobata. 



7. U. glabra. 



Hamuli novelli vix hirsuti v. cito glabri, annotini plerique grisei v. 



flavescentes. Folia etiam ramulorum fructiferorum pro parte 



apice 3(-5)-lobata 8. U. laciniata. 



Semina apice samarae juxta emarginaturam sita v. tantum paulo ab ea remota 

 (et tantum in fructibus satis brevibus et latis U. pumilae in centro samarae 



sita) Subsect. 2. FOLIACEAE. 



Pedicellorum pars inferior pilosa parte superiore subaequilonga v. brevior, 



vix V. rarius ea v. perigonio paulo longior (v. folia non coriacea lucida- 



que et non simpHciter obtuse serrata) . 



Samarae pleraeque obovatae v. satis anguste ellipticae, interdum in disco 



seminitego pilosae, v. folia satis magna, nervis utrinsecus 16 v. ultra 



instructa, basi distincte inaequalia, margine dupliciter serrato-dentata. 



Ser. a. Nitentes. 

 Samarae undique glabrae (v. in U. japonica tantum juveniles in disco 

 parce pilosae). 

 Samarae oblongo-ellipticae, circiter duplo longiores quam latae. Folia 

 lanceolata v. elliptico-lanceolata, subtus tantum in axillis nervorum 

 lateralium (lateris longioris 18-24, apice satis sensim producto 

 incluso) barbata, coriacea. Gemmae apice ramulorum obovato- 



