38 JOURNAL OF THE ARNOLD ARBORETUM [vol. hi 



Robinia pseudoacacia f. dependens, nom. nov. — R. pseudo-Acacia 

 monophylla pendula Dieek in 111. Monatsh. Gartenb. n. 104 (1883).— 

 Hartwig, 111. Geholzb. ed. 2, 332 (1892), as var. monophylla pendula. — 

 Voss, Vilmorin's Blumengart. I. 218 (1894), as f. monophylla pendula. — 

 Schneider, 111. Handb. Laubholzk. n. 83 (1907), as var. monophylla f. 

 pendula. — R. Pseudacacia pendula monophylla Zabel in Beissmer, Schelly 

 & Zable, Handb. Laubholz-Ben. 270 (1903). 



As the varietal name pendula given by Dieck to this form which may 

 be considered a pendulous subform of R. pseudo-acacia f. unifoliola is 

 preoccupied by R. pseudo-acacia pendula Loudon, a new name is proposed 

 here. 



Robinia pseudoacacia f. erecta, nom. nov. — R. Pseudo-Acacia mono- 

 phylla fastigiata Dieck, Haupt-Cat. Zoschen, 65 (1885). — Hartwig 111. 

 Geholzb. ed. 2, 332 (1892), as var. monophylla fastigiata. — Schneider, 

 111. Handb. Laubholzk. n. 83 (1907), as var. monophylla f. fastigiata. 



The varietal name fastigiata given by Dieck to this form is preoccu- 

 pied by R. pseudoacacia fastigiata Neumann 12 and therefore a new name 

 is proposed here. 



X Robinia Slavinii (R. Kelseyi x Pseudoacacia), hybr. nov. 



Small tree: young branchlets slightly and sparingly villose at first, 

 soon glabrous, slightly zigzag, red-brown at the end of the first season, 

 with few, short and straight prickles. Leaves 9-17-foliolate; leaflets 

 oblong-elliptic to oblong-ovate or narrowly oblong-ovate, the lower ones 

 usually smaller and more or less ovate, 2.5-5 cm. long and 1.2-2.2, rarely 



to 2.4 cm. broad, obtuse or sometimes emarginate, rarely acutish, mucron- 

 ulate, glabrous, except slightly pubescent on the midrib beneath when 

 young, yellowish green above, pale green beneath, firm at maturity; peti- 

 oles 2-3 cm. long, like the rhachis very slightly pubescent when young, 

 soon glabrous. Racemes G-10-flowered, rather loose, with the peduncle 

 8-13 cm. long; peduncle 2.5-3.5 cm. long, like the rachis slightly and loosely 

 villose and eglandular; pedicels 3-0 mm. long, slightly or sometimes more 

 densely villose, and rarely with a few solitary glands; calyx broad-cam- 

 panulate, 0.8-1 cm. high, the lower lip divided nearly to the middle into 

 ovate long-acuminate lobes or less deeply divided with triangular-ovate 

 acute lobes, the upper lip less than half as deeply divided, finely and thinly 

 villose; corolla about 2.5 cm. long, rosy-pink, standard rounded, emargin- 

 ate, about 2 cm. across, wings oblong, without the claw 1.8 long and 8 



12 R. pseudo-acacia fastiyiata Neumann in Ilorticulteur Franc. 1857, 222. This is 

 described by the author as a form very similar to tortuosa; all the branches ending in 

 a ramification, the leaves long and pendent of a very glaucous color, the large branches 

 somewhat spiny and very short. It is not the R. pseudacacia var. fastigiata Lemaire 

 which is a synonym of R. pseudoacacia f. pyramidalis Pepin (in Rev. Hurt srr. 2, IV. 

 240 [1845].— R. pyramidalis Poiteau in Ann. Soc. Hort. Paris, XXXI. 171 [1842].— 

 R. iuermis pyramidalis Schicklcr in Gartenfl. VI. 97, t. 190 [1X57]. — Neubert in Deutsch. 

 Mag. Gart.-Blumenk. 1857,70, fig. — R. pseudocacia var. fastigiata Ilort. apud Lemaire 

 in 111. Hort. vi. misc. 20, fig. [1859]. — Morren in Belg. Hort. XIV. 27, fig. [1X64].— Pean 

 in Card. Chron. ser. 3, xli. 151, fig. 09 [1907] ). 



