30 JOURNAL OF THE ARNOLD ARBORETUM (vol. hi 



less pubescent though the fruiting pedicels, at least on some specimens, 

 show traces of pubescence, otherwise the specimens of this number differ 

 little from P. japonica Engleri Koehne which is known from Manchuria. 

 In Wilson's No. 8748 and Faurie's No. 77 the fruiting pedicels show no 

 trace of pubescence, though the leaves beneath are pilose all over in 

 Faurie's specimen and densely so on the veins in Wilson's specimen. 



Prunus japonica var. Nakaii is growing at the Arnold Arboretum 

 where it was raised from seed of Wilson's No. 10596 sown in December, 

 1918, and germinating in April 1920; it has not yet flowered here. 



oba Lindl. f. normalis, nom. no v. — Prunus triloba Stapf 



Prunus triloba Lindl. f. normalis, nom. nov. — 

 in Bot. Mag. cxxxn. t. 8061 (1906). 



A typo recedit floribus normalibus simplicibus. 



The nomenclatorial type of P. triloba is the double flowered form in- 

 troduced in 1855 by Fortune from China into England and first described 

 by Lindley in 1857. This form is known as P. triloba plena Dipp. and 

 the form with single flowers is usually called the type. From the nomen- 

 clatorial point of view, however, the case should be just reversed and it 

 seems therefore advisable to give to the phylogenetic type a distinct 

 name, for which I propose f. normalis. The single-flowered form was 

 apparently first introduced into cultivation by Dr. Bretschneider who 

 sent seeds in 1883 and 1884 from Peking to the Arnold Arboretum; the 

 plants raised from this seed flowered for the first time in 1888. 



Prunus Cerasus f. plena Linnaeus, Spec. 1.474 (1753), as var. — Prunus- 

 Cerasus ( 1 erams 4. plena Weston, Bot. Univ. i. 224 (1770). — Cerasus 

 caproniana £. multiplex Seringe in De Candolle, Prodr. n. 537 (1825). 

 P rutins Cerasus (3. flore pleno Sweet, Hort. Brit. 134 (1827). — Cerasus 

 vulgaris 3. flore pleno Hort. apud Loudon, Arb. Birt. n. 694 (1838). 

 Cerasus austera fi. multiplex Roemer, Syn. Monog. in. 75 (1847). — Cera- 

 sus acida 3. /lore pleno Kirchner in Petzold & Kirchner, Arb. Muse. 252 

 (1864). — P. Cerasus flore albo pleno Hartwig, 111. Geholzb. 287 (1892).— 

 Prunus Cerasus f. semiplena Schneider 111. Handb. Laubholzk. 616 

 (1906). — Voss in Putlitz & Meyer Landlex vi. 347 (1912), as subsp. 



vulgaris forma. 



The varietal name given by Linnaeus to the double-flowered form of 

 P. Cerasus seems to have been neglected by almost all later authors, 

 but as lie quotes "Cerasus hortensis flore pleno Bauh. pin. 450," the 

 name cannot be intended for any other form then that well known 

 the 16th century and figured by several pre-linnean writers under various 

 names. 8 Its flowers are not perfectly double, but have a smaller or 



1 Cerasus vulgaris dupliciflora Lobel, Icon. n. t. 172 (1581). — Cerasus multiflora, 

 Tabernaemontanus, Krauterb. 693, fig. (1588). — Cerasux vmltiflora II. Tabernamon- 

 tanus, 1. c. 694, fig. (1588). — Ceraxus /lore pleno Besler, Hort. Eystet. i. fol. 4, fig. 1 

 (1613).— Cerasus hortensis flore pleno Miller, Fig. PI. i. 59, t. 89 (1760).— "Cerisier a 

 fleur semidouble" Dulniniel, Arb. Fruit, i. 173, t. 5 (1708). — Loiseleur in Nouv. Dull 

 v. 19 (1812). 



