ROSACEAE. — PRUNUS 71 



Western Hupeh: Hsing-shan Hsien, woods, alt, 1700 m., May 

 1907 (No. 62, as to flowering branches; the fruiting branches belong to 

 P. discadenia Koehne, a new species of the section Phyllomahaleh.). 



DISPOSITIO PRUNI SUBGEN. PADI ET CLAVIS 

 SPECIERUM CHINENSIUM. 



Calyx fructifer totus persistens; bracteae caducae; stylus brevis. 



Sect. I. CALYCOPADUS. 



* Pedunculi racemorum foliati (intermixtis interdum nonnuUia nudis); folia 



decidua v. sempervirentia. (Species omnes Americanae.) 



Subaect. 1. CAPOLLINIA. 



** Pedunculi semper nudi; folia decidua Subaect. 2. CALYCINIA. 



t Ramuli racemorumque pedunculi basi baud involucrati. 

 Folia subtua glabra v. baud ubique pilosa. 

 Venarum reticulum supra nunquam, subtus nonniai post anthesin 

 prominulum. Folia supra medium latiora, incumbenti-serrulata. 



P. Buergeriana. 

 Venarum reticulum jam durante anthesi utraque pagina manifeste pro- 

 minulum; folia subtua in nervorum axillia multia barbulata ceterum 

 glabra, majora latiora (6-11 cm.: 2.5-4.5 cm.) quam in P. stellipila, 



brevius serrata dentibus latioribus P. venosa. 



Folia subtus ubique, versus coatam densius, pilis fasciculatis conspersa, 

 minora angustiora (4.5-10 cm.: 2-3.5 cm.) quam in P. venosa, longiua 



serrata dentibus anguatioribus P. stellipila. 



tt Ramuli ac pedunculi basi usque ad autumnum squamis involucrati,. 



involucro 7-20 mm. longa P. perulata. 



Calyx fructifer (ima basi excepta) deciduus Sect. 2. GYMNOPADUS. 



* Sempervirentea. Pedunculi nudi; bracteae caducae; atylua brevia. 



Subsect. 3. LAUROCERASUS. 

 Petioli eglandulosi. Folia plerumque ovato-oblonga, caudato-acuminata, 



6-9 cm. longa. Racemi glabri P. microbotrys. 



Petioli glandulosi. Folia oblonga, acuminata, 10-18 cm. longa. Racemi 



pubescentes P. macrophylla * 



** Folia decidua. 



t Pedunculi foliati (intermixtis interdum nonnuUis nudis); bracteae ca- 

 ducae Subsect. 4. EUPADUS. 



t Pedicelli fructiferi insigniter incrassati pallide lenticellati. Stylus brevis. 

 (Folia in speciebua chinensibus subtus aequaliter pilosa.) 



Ser. 1. Pachtpodium. 



Pagina inferior inter pilos nunquam rufos mox vel ab initio optima 



conspicua. 



Pili tranaversi paralleli breves adpressi submicantea. . P. Wilsonii. 



Pili mox subhirti perturbati (initio tantum tomentum sericeum 



candidum densissimum sistentes) P. sericea. 



> Prunus macrophylla Siebold & Zuccarini in Abhand. Akad. Munch. IV. pt. ii. 

 122 (Fam. Nat. Fl. Jap. 14) (1843). 



Laurocerasus macrophylla C. K. Schneider, III Handb. Laubholzk. I. 647, fig. 

 355 1. (1906). 

 So far only reported from eastern China (prov. Kwangtung). 



