122 



THE 



[vol. II 



elliptica vel ovato-elliptica vel infcriora interdum obovata acuta, basi cune- 

 ata, 3-6 cm. longa et 1.7-3 cm, lata, crenato-serrata dentibus late ovatis 

 abrupte acuminulatis, interdum leviter dupliciter serrata, supra sparse 

 adpresse pllosula, subtus sparse, ad nervos densius viilosa, utrinsecus 

 nervis 5-8; pctioli 0.4-1 cm. longi, sparse villosi, apice plerumque glandulis 

 1-3 instruct!; stipulae subulatae, glanduloso-serrulatae, basi lobulis 1-2 

 instructae. Florcs solitarii, coetanei, albi, in alabastro colore roseo suf- 

 fusi, fere 2.5 cm. diam.; pedicelli circiter 5 mm. longi, glabri; calyx late 



ca 



obtusa, serrulata, extus glabra, intus villosula, sub antliesi reflexa, tubura 



fere aequantia; petala ovalia, 11-13 mm. longa; stamina circiter 30, petalls 



breviora; ovarium villosum; stylus staminibus paullo brevior. Fruclus 



subglobosus, ruber, sparsissime villosus; putamcn globoso-ovoidcum, 



12 mm. longum ct 11 mm. latum, compressum, carinatum, leviter punctato- 

 rugulosum. 



Cultivated at tlie Arnold Arboretum sub no. 3176-5 (raised from seed of P. 

 triloba in 1902); specimen collected May 9, 1914, Aug. 14, 1915 (fruit), May 23, 

 1917, May 3, 1919, September 11, 1920. 



This hybrid originated in 1902 at the Arnold Arboretum from seed of a 

 plant of P. triloba derived in the second generation from seed sent by Dr. 

 Bretschneider in 1884 from the mountains near Peking. It differs from 

 P. triloba chiefly in the white flowers coming out with tlie first young leaves, 

 the longer pedicels, the reflexed calyx-lobes pubescent inside, in the stamens 

 exceeding the style, the generally elliptic, less coarsely and scarcely doubly 

 serrate leaves, in the longer petioles, the larger more succulent and less 

 hairj' fruit with a more compressed sharply keeled stone, and in the shorter 

 stipules of the winter-buds. From P. cerasifera Ehrh. which blossoms at 

 about the same time and is apparently the other parent, it differs in the 

 red-brown color of the one year old branchlets, in the shorter pedicels, the 

 villous ovary', the larger and broader sometimes obovate and more pubes- 

 cent leaves with coarser more acute teeth and in the slightly hairy fruit 

 with a more globose stone. It is interesting as being a hybrid between 

 species of the subgenera Amygdalus and Prunophora, and is to my knowl- 

 edge the first known hybrid between these two subgenera. 



Primus arnoldiana is a handsome freely and early flowering shrub of 

 rather dense habit. From P. cerasifera it differs in its more compact 

 shrubby habit and from P. triloba in its more numerous white flowers. 



Prunus Meyeri,^sp. vel hybr. nov, (? P. Maackii x Maximowiczii.) 

 Arbor pyramidalis ramis patentibus, ramulis junioribus puberulis, anno- 

 tinis pur])ureo-fuscis, ramis vetustioribus aurantiaco-brunneis lucidis laevi- 

 bus lenticcllis magnis horizontalibus notatis, cortice trunci brunneo longi- 

 tudinahter fisso; gemmae ovoideo-conicae, brunneae, glabrae, pauci-peru- 

 latae. Folia ovata v. elliptico-ovata ad ovato-oblonga, acuminata, basi 

 pleraquej rotundata, 4-8 cm. longa et 3-5 cm. lata, eaturionum pleraque 

 oblongo-ovata et ad 14 cm. longa et fere ad 6 m. lata, dupliciter ad subsim- 

 pKciter serrata dentibus triangulari-ovatis acutis, supra glabra, laete 



