54 JOURNAL OF THE ARNOLD ARBORETUM [vol. n 



the obtuse or acute, serrate or serrulate never lobed leaves of the flowering 

 branchlets and the shglitly lobed rather broad leaves of the vigorous shoots, 

 pubescent beneath at least on the veins. The mature leaves of the shoots 

 resemble those of M, iocnsis var. Palmeri^ but that species diiTers in its 

 tomentose calyx. From 3/. lancijolia which some forms of M, bracteala re- 

 semble it differs in the broader and thicker strongly veined and pubescent 

 leaves of the shoots, which are in M. lancijolia thin and glabrous at matur- 

 ity and those of the flowering branchlets acute or acuminate at the a])ex. 

 It is perhaj)s most closely related to M, angustiJoUa from which it differs 

 chiefly in the broader and larger serrulate or serrate, not crcnate leaves 

 usually rounded at base and of thinner texture and not turning brown in 

 drying, like those of M. angiistifolia. The persistent bractlcts which form a 

 conspicuous feature of the Missouri specimens are smaller and early de- 

 ciduous in most other specimens, 



Malus ioensis f. plena, comb. nov. — Pyrus angusfifolia fl. pleno in 

 Gard. Chron. ser. 3, xiii. 43, fig. 8 (1893). — Pyrus coronaria Jl, pleno, 1. 

 c. XXV. 39, fig. 145 (1899). — M, angustijolia plena ILirtwig in Mitteil. 

 Deutsch. Dendr. Ges. xvi. 2G8 (1907). — &L angustijolia JL pleno Morel 



in Rev. Hort. 1910, 60, tab. — Burvenich in Rev. Hort. IJelg. xxxviii. 185, 



tab. (191*2). — M, coronaria var. plena Schneider in Silva-Tarouca, Uns. 

 Freil.-Laubg. 204 (1913). — Pyrus coronaria f. plena Voss in Putlitz & 

 Meyer, Landlcx. iv. 68 (1913). — Pyrus coronaria ioensis Jl, pleno Kache in 

 Gartenw. xviii. 477. fig. (1914). — Pyrus ioensis Jlore pleno Bean, Trees 

 Shrubs Brit. Isls. ii. 286 (1914).— Pyrus angustijolia Bechfelii Greening 

 Nursery Co., Descript. Book, 31, fig. (191.^). 



This double-flowered form of M, ioensis, generally known as '* Bechtcl's 

 Crab " was found near Staunton, Illinois, and was introduced into culti- 

 vation by E. A. Bechtel of Staunton about 1888 from a tree found wild 

 northeast of Staunton and known to old settlers for about 40 years (see 

 Garden Mag. xvir. 318 [1913]). Flowering specimens were sent to the 



Arboretum in 1892 by Mr. Bechtel under the name Pyrus angustijolia 

 Jl. pleno. 



Hybrids 

 X Malus robusta, nomen nov. == M. baccata X prunijolia Kochne, 



Deutsch. Dendr. 260 (1893). 



'/< 



tenfl. XI. 202, t. 3G4, figs. 1, 6 (var. cerasiformis in lab.) (1802). — Pynifi 



fit 





45 (1874), non Tausch. — Pyrus 

 M, microcarpa iurbinata Carricre, 



71 (1883). 



if< 



Carricre, I c. 7'2 (1883). — M. microcarpa robusta Carricre, 1. c. 70 (1883). — 

 M. microcarpa jucunda Carricre, 1. c. 81 (1883). — M. microcarpa ma- 

 crantha Carriere, 1. c. 94 (1883). — M. microcarpa kermesina Carricre, 1. c. 

 87, fig. 15 (1883); in Rev. Hort. 1885, 112, fig. 2\. — Mains cerasijera 

 Zabel in Ceissner, Schclle & Zabel, Ilandb. Laubholz-Iien. 187 (1903), non 



Spach. — Malus cerasiji 



if' 



