72 WILSON EXPEDITION TO CHINA 



Pagina inferior usque ad mensem octobrem pilis perfecte abscondita, 

 pilis tomentimi sericeum intense rufo-ferrugineum submicantem sis- 



tentibus P. rufomicans. 



tt Pedicelli fructiferi nee incrassati nee lenticellati. 



Stylus brevis Ser. 2. Leptopodium. 



Putamen manifeste rugosum. Petala 6-8 mm. longa etaminibus 



duplo longiora P. Padus} 



Putamen laeve v. obsolete rugosum. Petala 3-4.5, raro ad 5 mm. longa, 

 staminibus aequilonga v. breviora, rarissime manifeste longiora. 

 Folia in acumen argutum plerumque longum producta. 



Putamen 7 mm. longum. Folia basi nonnuUa rotundata, plera- 

 que vero profunde cordata, argutissime serrata dentibus angustis 

 longis tenuissime acuminatis, subtus nunquam papillosa; petioli 

 15-42 mm. longi, valide 2- (v. l-6)-glandulosi. Racemi 10-17 

 cm. longi, glabri; pedicelli 4-13 mm. longi; petala 4.5 mm. longa, 



staminibus aequilonga P. ssiori.'^ 



Putamen 4-5.5 mm. longum. Folia basi rotundata v. baud raro 

 manifeste cordata, argute v. minutim serrata dentibus semper 

 minoribus quam in P. ssiori, subtus nimc papillosa nunc epapil- 

 losa; petioli 11-24 mm. longi, plerique glandulis 1-2 debilibus 

 muniti. Racemi 12-23 cm. longi, nunc glabri nunc puberuli; 

 pedicelli 2-6 mm. longi; petala 2-4.5 mm. longa, staminibus 



aequilonga v. vix breviora P. brachypoda. 



Folia leviter breviter v. baud acuminata, obtusiuscula mucronata 

 V. obtusa V. subemarginata, semper brevissime v. minutim ser- 

 rulata. Putamen 4-6 mm., raro 7 mm. longum. 

 Folia subtus glaberrima v. nonnisi in nervorum axillis barbata; 

 petala staminibus aequilonga v. longiora. 



Calyx intus pilosus, quare etiam calycis basis sub fructu persis- 

 tens intus hirta. Petioli glandulosi. 

 Folia obtusa v. subemarginata, subtus glaberrima ac vix pal- 

 lidiora quam supra, venarum reticulo tenerrimo baud 



prominulo intensius colorato P. obtusata. 



Folia plerumque leviter breviter acuminata apice obtusi- 

 uscula mucronata, subtus glaberrima v. in axillis pauUulum 



^ Prunus Padus Linnaeus, Spec. 473 (1753). 



Prunus racemosa Lamarck, Fl. Frang. III. 107 (1778). 

 Padus vulgaris Borkhausen, Forstbot. II. 1426 (1803). 

 Cerasus Padus De Candolle, Fl. Frang. IV. 680 (1805). 



Padus racemosa C. K. Schneider, III. Hand. Laubholzk. I. 639, fig. 351 a-h, 

 352 a (1906). 

 So far only reported from northern China, Mongolia, Shensi, and Chili. 

 * Prunus ssiori F. Schmidt in Mem. Acad. Sci. St. Petersbourg, s6r. 7, XII. No. 

 II. 124 (Reis. Amurland) (1868). 



Padus ssiori C. K. Schneider, III. Handb. Laubholzk. I. 647 (1906). 

 Of this species I have seen specimens from Saghalin and Japan, and it is also 

 reported from southern Mandshuria, but has not yet been collected in other parts 

 of the Chinese Empire. C. K. Schneider has referred several specimens of P. Gray- 

 ana in the Berlin herbarium to P. ssiori, but these two species, though similar in 

 the serration of the leaves, are otherwise very different and can always be easily 

 distinguished with certainty. It is less easy to distinguish P. ssiori from P. brachy- 

 poda, var. pseudossiori. 



