ROSACE AE . — PRUNUS 245 



Subsect. 8. SARGENTIELLA Koehne, n. subsect. 



42. Prunus pseudocerasus Lindley in Trans. Hort. Soc. Lond. VI. 90 (1826). — 

 Koehne in Mitt. Deutsch. Dendr. Ges. XVIII. 171 (1909), ubi descriptio completa.» 

 Cerasus Pseudocerasus G. Don in Loudon, Hort. Brit. 200 (1830). 

 Prunus Sieboldii Koidzumi in Tokyo Bot. Mag. XXV. 184 (1911)." 



Prunus pseudocerasus, forma Sieboldii Maximowicz in Bull. Acad. Set. St. 

 Pctersbourg, XXIX. 102; in Mel. Biol. XL 699 (1883), diagnosi emendanda.— 

 Koehne in Mitt. Deutsch. Dendr. Gcs. XVIII. 172 (1909).» 



Prumis paniculata Ker in Bot. Reg. X. t. 800 (1824), excludenda diagnosi e 

 Thunbergio desumta, non Prunus paniculata Thunberg, quae Symplocos 

 spec. 

 Cerasus paniculata De Candolle, Prodr. II. 539 (1825), quoad tabulam Kerianam, 

 sed excludendo synonymo Thunbergiano. 



' Koidzumi considers P. pseudocerasus Lindley an entirely different species for 

 the following reason: "P. pseudocerasus Lindley (non aliquot author. Europ. Amer. 

 et Japonica) proved to be the Chinese Yung-to, and a species of the section Eucera- 

 sus from the illustration by Dr. Hayata, which is delineated from Lindley's original 

 specimen in the herbarium of the Cambridge University." The following particu- 

 lars of liis description are especially important: Younger leaves on the petiole and 

 on the veins beneath pilose or puberulent, glabrous above, doubly serrate. Flowers 

 white; the corymbose racemes 4-5-flowered, pubescent, long or short peduncled; 

 cupula broadly obconical, sepals ovate-elliptic, during anthesis horizontally spread- 

 ing; style glabrous. Chinese name Yung-to. Central China, cultivated in Japan. 



I have not yet seen a plant which agrees with this description. Prunus pseu- 

 docerasus Koidzumi certainly does not belong to the sect. Eucerasus, which is not 

 represented in China. If Koidzumi is right, it seems difficult to explain why Lindley 

 should have quoted plate 800 of the Botanical Register as a figure of his P. Pseudo- 

 cerasus, for this plate certainly represents the plant which all later authors have 

 called P. pseudocerasus and which I place here. Concerning the Chinese name 

 Yung-to, it belongs, according to Lindley, not only to his P. pseudocerasus, but 

 also to his P. serrulata; according to Wilson, the name Yung-to (Ying-to) is ap- 

 plied to every Cherry, while Ku-ying-to (bitter cherry) is applied to the species of 

 the sect. Padus. 



2 Prunus pseudocerasus, var. humilis Makino in Tokyo Bot. Mag. VI. 52 (1892) 

 = Prunus pseudocerasus, a. spontanea, subvar. humilis Makino, 1. c. XX. 44 (1906). 

 — Koidzumi in Tokyo Bot. Mag. XXIII. 182 (1909) = Prunus pseudocerasus, var. 

 jamasakura, f. humilis Makino, 1. c. XXII. 98 (1908) = P. jamasakura, a elegans, 

 a glabra, f. hortensis Koidzumi, 1. c. XXV. 185 (1911), does not seem to belong here, 

 but I have not yet succeeded in finding out where to place it. It seems equally 

 impossible to place or to refer to any other known species. Primus pseudocerasus, 

 var. jamasakura, f. pubescens Makino in Tokyo Bot. Mag. XXII. 98 (1908) = P. 

 jamasakura, a elegans, h pubescens Koidzumi in Tokyo Bot. Mag. XXV. 185 (1911). 

 The words "petiole spreadingly pubescent, pedicels spreadingly pubescent, calyx 

 nearly glabrous" would lead me to think of P. paracerasus Koehne if it were not 

 for "common peduncle short or very so" and "leaves sparsely pubescent on both 

 sides." In P. paracerasus Koehne the peduncles are long and the leaves glabrous 

 above. Of the pubescence of the style nothing is said by Makino. 



« It seems doubtful if P. pseudocerasus, var. Sieboldii Matsumura in Tokyo Bot. 

 Mag. XV. 101 (1901) really belongs here. Though the author says "petioli pedun- 

 culi pedicelli subvillosi," he also says, "calyx glaber, stylus glaber." 



