206 WILSON EXPEDITION TO CHINA 
bracteae 4-6 mm. longae; pedicelli 6-12 mm. longi; sepala interdum 
utrinque denticula unica munita; petala 5 mm. longa, 3.5 mm. lata, 
alba; stamina ad 6.5 mm. longa; pistillum 11 mm. longum. 
Western Hupeh: Fang Hsien, woodlands, rare!, alt. 2000 m., 
May 15, 1907 (No. 182, as to flowering branches; the fruiting branches 
belong to the totally different P. Rossiana Koehne. 
The whole appearance of this plant, particularly the shape of the cupula and 
of the sepals agrees well with P. litigiosa Schneider. The differences in the floral 
parts might be explained by the fact that the flowers of the specimens before me 
are just beginning to open; the pedicels, petals and stamens, therefore, may not 
have attained their full length. 
Prunus involucrata Koehne, n. sp. 
Arbor 3-5-metralis; ramuli novelli glabri, annotini vetustioresque 
cinerei; gemmae quas vidi 1 mm. longae, rotundatae, obtusae, glabrae. 
Stipulae caducae; petioli 10-12 mm. longi, glabri, glandulis 1-2 prope 
apicem insertis, plerumque latis planis; lamina e basi rotundata late 
ovata, 7.5-9.5 em. longa, 4—5.2 cm. lata, longiuscule subito acuminata, 
inaequaliter v. hine inde duplicato-serrata, dentibus late triangularibus 
acutis v. subcuspidatis, glandula parva punctiformi terminatis, supra 
glabra, subtus in nervorum axillis barbulata ceterum glabra, nervis 
utrinsecus 9-11, subtus manifeste pallidior quam supra, papyracea. 
Involucra sub anthesi arcte adhaerentia, circiter 8-10 mm. longa lata- 
que, ante fructificationem decidua; pedunculus sub anthesi nullus, 
sub fructibus 3-5 mm. longus; umbellae (2-)3-5-florae, in ramulis 
brevibus confertissimae, praecoces; bracteae absconditae; pedicelli 
9-10 mm. longi inclusi v. subinclusi, fructiferi ad 19 mm. longi, dense 
villosi; eupula 5 mm. longa, breviter latiuscule campanulata, usque 
ad medium villosa superne glabra; sepala reflexa, ovata obtusa, 3 
mm. longa, integra, ciliolata ceterum glabra; petala orbicularia, 1 
mm. longa lataque, bilobo-emarginata, sinu lato triangulari, rosea. 
Stamina 43, petalis triente breviora, ad 7 mm. longa; pistillum 12 mm. 
longum, stylus stamina aequans glaberrimus. Drupa ovali-globosa, 
10 mm. longa, 3 mm. diam., rubra; putamen subglobosum, 7.2:6.5:5.2 
mm., sulcis paucis obsoletis obliquis juxta carinam planam exsculptum. 
Western Hupeh: cultivated around Ichang, up to 1000 m. alt., 
March and May 1907 (No. 1). 
The specimens determined by Pampanini (in Nuov. Giorn. Bot. Ital. XVII. 293 
[1910]; XVIII. 122 [1911]) as P. hirtipes Hemsley, namely Silvestri's No. 973 from 
Hupeh, Pa-tao-ho, alt. 1000 m., and Nos. 3024 and 3024? from Ou-pan-chan, alt. 
above 600 m., may belong to P. involucrata, if No. 973 is not to be referred t9 
P. glabra Koehne. 
