1920] REHDER, NEW SrECIES. VARIETIES AND COMBINATIONS 57 



the general appearance of a vigorous form of M. rohusta, but the vernation 

 of the leaves which at least on the upper part of vigorous shoots are dis- 

 tinctly lobed and the number of styles which varies to 4 and even to 3 

 show the influence of M. Sieboldii. Of the origin of our plants nothing cer- 

 tain is known; the form with the round head probably came up in a lot of 

 mixed Malus seeds brought in 1892 by Professor Sargent from Japan. As 

 it appears from the synonyms enumerated above, forms of similar origin had 

 been cultivated by Zabel in the arboretum at Muenden, Germany, before 

 1878, but a plant received as M, Ringo suhlohata from Spaeth's nursery near 



M 



Malus Amoldiana 



nomen. 



— Dunbar in Gardea Mag. xxx. 22. fig. (1919) (= M. haccata X 

 florihunda.) — M.floribunda var. Arnoldiana Rehder in Moeller's Deutsch. 

 Gart. Zeit. xxiv. 27, 2 figs. (1909).— Pyrus pulcherrima var. Arnoldiana 

 Bailey in Rhodora, xviii. 155 (1916); Stand. Cycl. Hort. v. 2875 (1916). 

 Malus vulcherrima var. Arnoldiana [Nash] in Jour. New York Bot. Ga 



. 194 (1918). 

 When I described this handsome 

 '. floribunday I believed that M.Jl^ 



M, floribu 



a species, being led to this change of opinion partly on account of the dis- 

 covery of a similar wild form described as M. florihunda var. spontanea 

 Koidz., and partly on account of the fact that the hybrid theory does not 



satisfactorily 



M.fl 



Malus purpurea, comb. nov. ( = 3f . atrosanguinea X M. puviila var. 

 N iedzwetzhyana) , — M, florihunda purpurea Barbier & Cie. in Rev. Hort. 

 1910, 539. — Pyrus Malus florihunda purpurea R. C. Notcutt in Gard. 

 Lxxvm, 220 (1914). — Pyrus florihunda X P. Niedzwetzkyana in Gard. 

 Chron. ser. 3, Lxii. 221, fig. 84 (1917). — This hybrid was ofl'ercd to the 

 trade in 1910 by Barbier & Cie. of Orleans, France, and was stated to be a 

 hybrid between M.floribunda atropurpurea and M. Niedzwet'Jcyana, which 

 seems to be correct judging from the characters of the plant. This makes 

 it a ternary hybrid, as M. atrosanguinea is supposed to be a cross between 

 M. Ilalliana and M. Sieboldii. From M, pumila var. Niedzwetzlnjana it 

 differs chiefly in the occasionally lobed, smaller and lustrous leaves, in the 

 longer-pedicled flowers with oblong petals and partly 4 styles and in the 

 smaller fruit with sometimes deciduous calyx; from M. atrosanguinea it dif- 

 fers in the purplish young leaves, the purplish wood, in the larger and darker 

 colored flowers and in the much larger fruit with usually jjcrsistent calyx. 



Besides this hybrid two other hybrids of M. pumila var. Niedzwetzkyana 

 have been briefly descriljcd by Professor N. S. Hansen in a leaflet published 

 by the Department of Horticulture of the South Dakota State College of 

 Agriculture and Mechanic Arts, entitled Northern Novelties for 1920. One 

 of these hybrids is called '*IIopa Red-flower Crab" and M. baccafa is stated 

 to be the male parent; it will, therefore, have to be classified as a variety 



