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 cm. longa, 3-4 cm. lata, longe caudata, cauda sursum angustissima, argute 

 inciso-duplicato- v. triplici-serrata, dentibus primariis majusculis, fere exacts 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, nervia 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 L^veille 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. II. 19 (1836-50), sensu proprio. — Schnei- 

 der III. Handb. Laubholzk. I. 601 (1906). 

 Prunus subgen. Microcerasus Focke in Engler & Prantl, Natilrl. Pflanzenfam. 



Ill, 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 m Garden and Forest, V. 580, fig. 99. (1892). 



Japan, western and northern China. — Shensi: Tai-pei-shan, 1910, TFm. 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; pediceUi 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, siirsum baud dilatata, sepala cupulae subaequi- 



longa; flores saepe conferti; petala 8 mm. lata Var. Graebneriana. 



Cupula 4.5-4.75 mm. longa, tubulosa v. sursum subdilatata, glabra v. 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. 

 Sepala cupulam dimidiam aequantia v. vix breviora; quando longiora sunt, ova- 

 rium fere a basi pilosum, pihs 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. Souliei. 



