ROSACE AE . PRUNUS 211 



Prunus Twymaniana Koehne, n. sp. 



Arbor 3-6-metralis; rami annotini glabri, cano-fuscescentes, ve- 

 tustiores nigrescentes. Folia sub anthesi tantum nota; petioli ad 

 4 mm. longi, glabri; glandulae 2 petioli apice v. laminae basi insertae; 

 lamina (videtur ovata) ad 2.5 cm. longa, baud v. leviter acuminata, 

 crenato-serrata, dentibus obtusis v. brevissime cuspidatis, glandula 

 valida breviter conica terminatis, supra glabra, subtus juxta costae 

 partem basalem tantum tenere villosa, purpurascens, nervis utrin- 

 secus circiter 10-11. Involucra erecta, 0.7-1.3 cm. longa; pedun- 

 culus brevissimus; flores 1-2 umbellati, subpraecoces; bracteae 

 oblongae, circiter 3-4 mm. longae, glandulis marginatae; pedicelli 

 9-12 mm. longi, glabri; cupula 7 mm. longa, e basi acuta tubulosa, 

 glabra, purpurascens; sepala erecto-patula, oblonga acutiuscula, 

 4.5 mm. longa, frequenter glanduloso-fimbriolata, glabra; petala 

 ovata, 6 mm. longa, 4 mm. lata, apice rotundata, eroso-crenulata, 

 alba; stamina 25, petalis fere duplo breviora, ad 3.5 mm. longa; pis- 

 tillum 12 mm. longum, stylus staminibus 2-3 mm. longior, inferne 

 parce villosus. Drupa ignota. 



Western Szech'uan: west and near Wen-ch'uan Hsien, alt. 

 2000-2600 m., March 1908 (No. 8io, as to flowering branches; the 

 fruiting branches belong to P. lobulata Koehne, which has no glands 

 on the serratures of the leaves). 



At the request of Mr. Wilson I have named this species in compliment to Bertie 

 Twyman, Esq., of the British Consular service in China, who was of very con- 

 siderable assistance to Mr. Wilson during 1908. Further investigation is needed 

 to determine whether P. ampla Koehne, which is known only in fruiting speci- 

 mens and has equally large glands on the teeth, belongs here. 



Prunus Conradinae Koehne, n. sp. 



Arbor 3-12-metrahs, truncus 20-50 cm. diam.; ramuli novelli 

 glabri, vetustiores cano-fuscescentes v. cinerei v. intense fusci; gem- 

 mae 3-6 mm. longae, glabrae. Stipulae angustissime lineares, 4-7 

 mm. longae, saepe basi pinnatifidae, longe glanduloso-fimbriatae, 

 post anthesin deciduae; petioli 10-17 mm. longi, glabri, glandulas 2 

 crassas apice v. paullo inferius gerentes; lamina e basi rotundata v. 

 hinc inde acuta v. subcordata obovata, obovato-oblonga, rarius fere 

 rotundato-ovata, 5.5-10.5(-15) cm. longa, 2.5-5.5-(6.8) cm. lata, 

 subito anguste acuminata, sat profunde, medio duplicato-serrata, 

 dentibus vix v. tenuiter acuminatis, glandula punctiformi terminatis, 

 saepe initio glabra v. piUs brevibus conspersa, demum semper fere 

 glabra, subtus in costa nervisque pilis conspersa, demum glabrescentia 



