19^0] REHDER, NEW SPECIES, VARIETIES AND COMBINATIONS 47 



Cultivated in the Durand-Eastman Park, Rochester, New York; specimens col- 

 lected: May 16, 1920, B. II. Slavin & J. Dunbar. 



This handsome form agrees in its characters with the type except that 

 the flowers are purple-pink in bud and suffused with pink when open. It is 

 a seedling from a tree of typical A, canadensis growing in Seneca Park, 

 Rochester, and represented in our herbarium by specimen collected by 

 B. H, Slavin and marked No. 10. The seedling described above, however, 

 shows unmistakably the influence of A. laevis which is growing at the same 



localitv. 



Malus L. 



In the following conspectus of the genus Malus thirty-two species are 

 recognized, including Eriolobus which had been considered by some botan- 

 ists a distinct genus. Tliese thirty-two species fall easily into several 

 distinct and apparently natural groups which call for a systematic arrange- 

 ment under sections and subsections to bring out their relationship. The 

 first division of the genus into sections was proposed in 1893 by Koehne, 

 w^ho divided it into the sections Calycomeles and Gymnomeles according to 

 the behavior of the calyx whether persistent or deciduous. Ten years later 

 Zabel considering the vernation of the leaves the most important char- 

 acter proposed the section Eumalus with involute and never lobed leaves 

 and the section Sorbomalus with conduplicate and more or less lolled leaves. 

 In 1906 Schneider added two new sections, Eriolobus corresponding to the 

 genus of that name, and Docyniopsis containing M. Tschonoskii which I 

 had referred in 1903 to the genus Eriolobus chiefly on account of the pres- 

 ence of copious grit-cells in the fruit; this character, however, I do not now 

 consider important enough for generic distinction and I am following 

 Schneider in referring Eriolobus to Malus. 



Sect. I. EUMALUS Zalel in Beissner, Schelle & Zabel, Handb. Laub- 

 holz-Ben. 185 (1903), nomen. — Schneider, 111. Handb. Laubholzk. i. 714 

 (1906). — Leaves involute in bud, never lobed; fruit without grit-cells. 



Subsect. 1. PuMiLAE, subsect. nov. — M. sect. Calycomeles Koehne, 

 Deutsch. Dendr. 257 (1893), pro parte. — Calyx persistent: styles 5; fruit 



about 2 cm. thick or larger. 



1. M. pumila Mill. — 2. 31, sylvestris Mill. — 3, M. pninifolia Borkh. — 

 4. 3/. spectabilis Borkh. — The species of this subsection are closely re- 

 lated. — Europe, western to eastern Asia. 



Subsect, 2. Baccatae, subsect. nov. — M. sect. Gymnomeles Koehne, 

 Deutsch. Dendr. 257 (1893), pro parte. — Calyx deciduous: styles 3-5: 



fruit small, not exceeding 1.5 cm. 



5. M. sihkimensis Koehne. — 6. M. baccata Borkh. —7. M. theifera 

 Rehd. — 8. M, Ilalliana Koehne. —The species of this subsection are 

 closely related except M. sikkimenis which seems to have some relation to 

 M. Prattii and M. yunnanensis, — Eastern Asia, Himalayas. 



Sect. IL SORBOMALUS Zabel in Beissner, Schelle & Zabel, Handb. 

 Laubholz-Ben. 721 (1906), nomen. —Schneider, 111. Handb. Laubholzk. 



