2C2 JOITINAL OF THE ARNOLD ARBORETUM [vol. i 



Formosa. East Coast : Pinan to Dakusui, between Pinan and Karcnko, abun- 

 dant in stony areas of river mouth, Nov. 18, 1918, £. 77. Wilnon (No. 1128); Pinan 

 and Taito (ex Ilavata)! 



The three species described by Hayata differ only by slight and partly 

 accidental individual differences and Mr. Wilson who has seen the type 

 specimens in Toyko says that they undoubtedly belong to the same species. 

 Kanchira in the second edition of his Trees of Formosa (Avhich does not differ 

 from the first except In a few nomenclatorial changes) had inserted after C. 

 formosana, acting on the suggestion of Mr. Wilson that the S])ecies belongs 

 to Pyracanlha, in parenthesis the name ryracantha formosana, but as five 

 years earlier Koidzumi had already united C.formosana and C, Koizumii 

 under the name C. Koidzumii, and as his choice cannot be modified ac- 

 cording to art. 4G of the International rules, though C. Jormosa has pre- 

 cedence on the page, tlie specific name *' Koidzumii " is the correct name 

 if the two species are united. Moreover, Pyracaniha formosana Kanehira 

 is not a valid publication, being cited only as a synonym. 



Crataegomespilus Dardari Simon-Louis var. Asnieresii, comb. nov. 

 Cratargo-McspUus '* Jules d'Asnieres " Simon-Louis apud Jouin in Jardin, 

 1899, 2^2. — Craiac(j}is Qxyacantha X Mespilus germanica 2. Asnieresi 

 Koehne in Gartenfl, L. 63*2 (1901). — Cratacgo-Mrspilus Dardari cratae- 

 goides Zabel in Peissner, Schelle & Zabel, Handb. LaublioIz-TJen. 180 

 (1903). — Crataegoniespilas Asnieresii Schneider, 111. Ilandb. Laubh, i. 765, 

 fig. 433G-n, 431A-C (1906). — Bean In Kew Bull. Misc. Liform. 1911, 268, 

 fig. 2. — Beck inKcichcnbach, Icon.Fl. Germ.xxv. 31, 1. 109 (1914?). — Bcr- 

 ger in Gartenwelt, xx 481, fig. la-d (1916). — Mespilus germanica X moiio- 

 gyna B. Asnieresi A^cherson & Graebner, Syn. Mitteleur. Fl. vi. 2. 46 (1906), 



As C. Asnieresii Schneider Is of the same parentage as C Dardari and 

 even originated on the same tree, it must be treated as a variety of the 

 older C. Dardari. 



X Crataegomespilus Gillotii, conib. nov. — Crataegus oxyacanfho-ger- 

 manica Gillot in Bull. Soc. Bot. France, xxii. xiv (1876), excl. synon.; in 

 Bull Herb. Boiss. ii. apx. iv. 18 (1894), pro parte. — Cratae-Mespilns Gil- 

 lotii G. Beck in Rcichcubach, Icon. Fl. Germ. xxv. 30, t. 107 (1914). 



Beck j)laced tliis plant, api)arently a hy])rid l^etween 3/^',s7///?/.s' ^prma/?/ra 

 and Crataegus monogyna under Cratae-Mespilus, a name proposed by 

 Camus In 1899 (in Jour, de Bot. xiii. 326) for the hylirid Ix'tween Mepilus 

 germanica and (Crataegus Qxyacantha first described as Mespilus grandi- 

 fiora Smith, ]>nt a year earlier Jouin had proposed (In Compt. Rend. Congr, 

 Hort. Paris, 9) the name Crataeg(>-Mes})ilus for graft hybrids between 

 Mespilus germanica and Crataegus monogyna. As both generic names are 

 intended for intermediate forms between the same genera, they should be 

 considered synonymous and the oldest name adopted as valid. It seems, 

 ho^^•ever, advisable to keep sexual hybrids and graft hybrids between the 

 same si^ecles distinct under different specific names, and to retain in this 

 case for the sexual hybrids between Crataegus monogyna and Mespilus 



