ROSACEAE. — PRUNUS 73 



barbata atque plerumque manifeste palHdiora quam supra, 



nervis venisque primariis subtus prominulis, reticulo 



plerumque pallido rarissime intensius colorato. P. pubigera. 



Calycis basis sub fructu persistens intus glaberrima. Petioli 



eglandulosi. Folia subtus glaberrima, pallida albicantia, costa 



nervis ochraceis, reticulo multo intensius colorato distinc- 



tissimo P- bicolor. 



Folia tota pagina inferiore laxe pilosa pallida, reticulo pallido 

 demum prominulo; petala staminibus triente breviora. 



P. velutina. 



Stylus longus Ser. 3. Grayopadus. 



P. Gray ana. 

 tt Pedunculi nudi; bracteae persistentes; stylus longus. 



Ser. 4. Maackiopadus. 

 A specie altera ^ hujus sectionis foliis subtus eglandulosis, racemis 

 4-7 cm. longis laxifloris, sepalis fimbriatis stylo glabro differt. 



P. laxiflora. 



XX. SPECIERUM DISTRIBUTIO SYSTEMATICA 



Sect. 1. CALYCOPADUS Koehne in Abhand. Bot. Ver. Brandenburg, LII. 107 

 (1910). 

 Calyx persistens. 



Subsect. 1. CAPOLLINIA Koehne in Abhand. Bot. Ver. Brandenburg, LII. 106 

 (1910). 

 Sect. Eupadus Koehne, Deutsche Dendr. 303 (pro parte) (1893). 



Species sempervirentes vel foliis deciduis, venarum reticulo saepe indole rhom- 

 bica. Pedunculi typice foUati; bracteae caducae. Calyx fructifer persistens. 

 Stamina circ. 15-25 (an semper?) ; stylus brevis. 



Species omnes americanae: P. salicifolia Kunth (Bolivia, Peru, Ecuador, Co- 

 lumbia, an Mexico?), P. Capollin (De Candolle) Koehne (Mexico), P. serotina 

 Ehrhart cum var. neomontana Small (Amer. bor. ut sequentes), P. eximia Small, 

 P. alabamensis Mohr, P. Cuthbertii Small, P. australis Beadle. 



Subsect. 2. CALYCINIA Koehne in Abhand. Bot. Ver. Brandenburg, LII. 107 

 (1910). 



Folia decidua, venarum reticulo isodiametrico, subtus in dentibus infimis bi- 

 glandulosa. Pedunculi nudi; bracteae caducae. Calyx persistens; stamina 

 10(-12); stylus brevis. 



Species omnes asiaticae: P. undulata Roemer (inde a Bengalia or. usque ad 

 Nepal), P. venosa Koehne (China), P. stellipila Koehne (China), P. perulata Koehne 

 (China), P. Buergeriana Miquel (China, Japonia). 



1 Pninus Maackii Ruprecht in Bull. Acad. Sci. St. Petersbourg, XV. 361 (1857). 

 Lauroccrasus Maackii C. K. Schneider, III. Handb. Laubholzk. I. 645, fig. 352 

 h-i (1906). 

 Known from Amurland and Mandshuria, but not yet reported from other 

 regions of the Chinese Empire. It differs from P. laxiflora in its leaves being glan- 

 dular punctate beneath, in the dense racemes, 2-3 cm. long, the bracts 1-2 mm, 

 long, the scarcely fimbriate sepals and in the style being loosely villose below the 

 middle. 



