1920] REIIDER, NEW SPECIES, VARIETIES AND COMBINATIONS 49 



21. M. platycarpa Relid. — 22. M. coronaria Mill. — 23. M, glances- 

 cens Rehd. — 24. M. glahrata Rehd. — 25. 3/. bradeata Rehd. — 26, M. 

 lancifolia Rehd. — 27. Mains angustijolia Mill. — 28. 3/. ioensis Britt. — 

 This is a very distinct and at the same time homogeneous group; its 

 species are so closel}^ related that some authors have considered them as all 



belonging to one s[>ecies. 



Mains angiistifol 



the species upon which Dccaisne based the genus Chloromeles. — Eastern 

 North America. 



Sect. IV. ERIOLOBUS Schneider in Fedde. Rep. Sp. Nov. in, 179 



(1906). — Pynis sect. Eriolobus Seringe in De Candolle, Prodr. ii. 636 

 (1825). — Eriolobus Roemer, Syn. Monog. in. 216 (1847). — Cormus sect. 

 Eriolobus Dccaisne in Nouv. Arch. Mus. Paris, x. 157 (Mem. Fam. Pomac.) 

 (1874). — Eriolobus sect. Eucriolobus Schneider, 111. Handb. Laubholzk. i. 

 725 (1906), pro parte. — Leaves conduphcate in bud, all deeply lobed, calyx 

 persistent, with reflexed lobes: styles 5, villous at base; stamens 20-30: lo- 

 cules of ovary extending with their apex into base of style and core of fruit 

 pointed and free at apex: fruit ellipsoidal, with grit-cells. 



29. 31. irilobata Schneid. A verj^ distinct species which has no close 

 relation to any other species. — Western Asia. 



Sect. V. DOCYNIOPS^S Schneider in Fedde, Rep. Sp. Nov. iii. 179 



(1906). — Eriolobus Rehdcr in Sargent, Trees & Shrubs, i. 74 (1903), pro 

 parte. — Leaves conduplicate in bud, not or very slightly lohed; inflores- 

 cence 2-5-flowcred; calyx persistent, with upright lobes; stamens 30-50; 

 styles 5, villous at base; locules of ovary extending into base of style and 

 core of fruit pointed and free at apex; fruit 2-4 cm. across, dotted, with grit- 

 cells, 



30. M, Tschonoskii Schneid. — 31. M. formosana Kawak. & Koidz. 

 32. M, laoscnsis A. Cheval. {Pyrus laoscnsis Cardot). — This group shows 



a close affinity to Docynia and particularly M . formosana much resembles 



in the structure of its flower that genus, but has only two ovules in each 



r 



cell. Mains docynioides placed by Schneider In this section belongs to 

 Docynia. — Eastern Asia. 



Malus baccata Borkhausen f. gracilis, forma nov. 



A typo recedit habitu humiliore, ramis patentibus ramulis gracilibus 

 pendentibus, foliis ab initio glabris, ovato-oblongis vel oblongc-ellipticis, 

 5-8 cm. longis et 2-4 cm. latis, basi late cuneatis, crenato-serrulatis, petiolis 

 1.5-3,5 cm. longis, floribus minoribus, circiter 3 cm. diam., stylis saepe 

 4, fructibus 0.8-1 cm. longis, late obovoideis vel subglobosis, rubris. 



Cultivated in tlie Arnold Arboretum; plants received from the Veitchian Nurser- 

 ies in 1913 as Pyriis sp. Purdom no. 327; type specimens collected May 14 and 

 October 21, 1919, preserved in the herbarium of the Arboretum. 



This form belongs to tlie typical variety of Malus baccata (var. sibirica 

 Schneid.), but differs from the commonly cultivated form chiefly in the 

 graceful pendent habit, the comparatively narrower obtusely serrulate 

 leaves with slenderer petioles, in the smaller flower with often only 4 

 styles and in the small fruits. The white flowers are not fragrant. 



