268 WILSON EXPEDITION TO CHINA 
pinnatifidis, longissime glanduloso-fimbriatae, persistentes; petioli 6-8 mm. longi, 
densissime ochraceo-hirsuti; glandulae interdum 2 petioli apici v. laminae basi 
insertae; lamina e basi subcordata v. raro rotundata ovata v. ovato-lanceolata, 
7-8 em. longa, 3-4 cm. lata, longe caudata, cauda sursum angustissima, argute 
inciso-duplicato- v. triplici-serrata, dentibus primariis majusculis, fere exacte tri- 
angularibus, denticulas ad 10 gerentibus, glandula parva depresso-capitata ter- 
minatis, supra laxe accumbenti-pilosa, subtus initio dense accumbenti-hirsuta, 
postea in nervis dense, inter nervos laxius ochraceo-hirsuta, nervis utrinsecus 
10-11, subtus pallidior. Flores fructusque ignoti. 
Szech'uan: Nan-ch’uan, summer 1891, A. von Rosthorn. 
This species resembles very much P. Nakaii Léveillé and P. japonica gracillima 
Koehne in the shape and serration of the leaves, but is readily distinguished by the 
dense hirsute pubescence of the branchlets, petioles and leaves, and by the deeply 
divided stipules. 
Sect. 2. AMYGDALOCERASUS Koehne, n. sect. 
Cerasus sect. Microcerasus Spach, sensu proprio (cf. p. 262 sub Grex II. 
Microcerasus). 
Microcerasus, Webb Phytogr. Canar. YI. 19 (1836-50), sensu proprio. — Schnei- 
der Ill. Handb. Laubholzk. 1. 601 (1906). 
Prunus subgen. Microcerasus Focke in Engler & Prantl, Natürl. Pflanzenfam. 
III, 3, 54 (1888), adjicienda P. tomentosa subgeneris Cerasi. 
Prunus sect. Trichocerasus et subgen. Microcerasus Koehne, Deutsche Dendr. 302, 
306 (1893). 
109. Prunus tomentosa Thunberg, Fl. Jap. 203 (1784). — Siebold & Zuccarini, 
Fl. Jap. I. 51, t. 22 (1826). — E. Meyer in Gartenfl. XXV. 2, t. 853 (1876). — 
Jack in Garden and Forest, V. 580, fig. 99. (1892). 
Japan, western and northern China. —Shensi: Tai-pei-shan, 1910, Wm. Pur- 
dom (No. 3). Without flowers it is impossible to refer the specimen to any of the 
varieties. 
CONSPECTUS VARIETATUM. 
Sepala cupula subbreviora ad sublongiora; ovarium inde a medio pilosum. Flores 
coaetanei; petala alba. 
Cupula 2.5-3.5 mm. longa, ima basi excepta glabra; sepala 3.5 mm. longa, extus 
pilosa, patentia v. subreflexa; pedicelli 2-3 mm. longi, petala 8 mm. 
Cupula brevis ac lata, sursum dilatata, sepala cupula sublongiora; flores sat 
remoti; petala 4-5 mm. lata. .. . ........- Var. Spaethiana. 
Cupula breviter tubulosa, sursum haud dilatata, sepala cupulae subaequi- 
longa; flores saepe conferti; petala 8 mm. lata. . . . ar. Graebneriana. 
Cupula 4.54.75 mm. longa, tubulosa v. sursum subdilatata, diss subglabra; 
sepala cupula subbreviora, erecta v. patentia, extus pilosa; pedicelli 2 mm., 
fructiferi ad 4 mm. longi; petala 10-10.5 mm. longa, 5-6 mm. lata. 
Var. insularis. 
Bepala cupulam dimidiam aequantia v. vix breviora; quando longiora sunt, ova- 
rium fere a basi pilosum, pilis infimis plerumque subretrorsis. 
Flores 5-meri, praecoces v. coaetanei; cupula glabra v. rarius pilosa; sepala 
extus pilosa v. rarissime glabra; petala alba (an semper?) 
Ovarium basi glabrum. 
Sepala (2.5 mm.) cupulaque (4.75 mm.) extus glaberrima; flores subsessiles 
praecoces. Rami annotini plus minus glabri., . . . . . . Var. Souliet. 
