ROSACEAE. — 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 Maximowiez in Bull. Acad. Sci. St. 
Pétersbourg, XXIX. 102; in Mél. Biol. XI. 699 (1883), diagnosi emendanda.— 
Koehne in Mitt. Deutsch. Dendr. Ges. XVIII. 172 (1909). 
Prunus 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- 
8us 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 his 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- 
eg to p^ d Cherry, while Ku-ying-to (bitter cherry) is applied to the species of 
e sect. Padus. 
2 Prunus pseudocerasus, var. humilis Makino in Tokyo Bot. Mag. VI. 52 (1892) 
= Prunus pseudocerasus, a. spontanea, subvar. humilis Makino, l. 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, l. 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, Prunus pseudocerasus, 
Var. jamasakura, f. pubescens Makino in Tokyo Bot. Mag. XXII. 98 (1908) = P. 
jamasakura, a elegans, b pub 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 an 
for “common peduncle short or very so” and “leaves sparsely pubescent on bot! 
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. 
