Ulmus I ^73 



J. Ulmus Pitteursii, Petzold and Kirchner, Arb. Muse. 566 (1864). 



L'orme Pitteurs, Morren, in Joum. Agric. Prat. 1848, p. 1 14, and in Belgique Horticole, ii. 133 

 (1852). 



This name was given to two varieties which were obtained as seedlings of the 

 orme gras in 1845, by M. de Pitteurs at St. Trond near Liege. One variety, 

 described as making annual shoots of 3 ft. in length, and with large leaves, 8 in. long 

 and 7 in. broad, is now little known ; but is probably identical with elms propa- 

 gated by layers, called orme St. Trond, which I saw in Looymans' nursery at 

 Oudenbosch in 191 2. These were undistinguishable in the young stage from 

 U. montana, but bore leaves 5 to 6 in. in breadth ; and are perhaps identical with a 

 variety of the latter species, which is occasionally sold as var. macrophylla} 



The other variety of U. Pitteursii apparently differed but little from the 

 ordinary Belgian elm ( U. belgica) and may be 2 the form of it which is prevalent in the 

 provinces of Liege and Limburg, if this is really distinct. It is said 3 to be repre- 

 sented by a tree so-named in the botanic garden at Liege, which is reputed to 

 have been planted by Morren. This I have had no opportunity of examining. 4 



8. Ulmus superba, Henry. 



Ulmus montana superba? Spath, Cat. No. 62, p. 102 (1885-1886). 



A narrow pyramidal tree, with smooth bark and very ascending branches. 

 Branchlets glabrous, remaining smooth and without fine striations, corky ridges not 

 being developed. Leaves, similar to those of U. montana in shape and numerous 

 nerves, but with long stalks; variable in size, 6 3 to 4 in. long, \\ to 2 in. broad, 

 obovate or obovate-elliptic, acuminate at the apex, very oblique at the base ; glabrous, 

 dark green, and smooth above ; lower surface glabrous, except for minute axil-tufts 

 of pubescence ; margin biserrate, non-ciliate ; petiole \ to \ in. long, with scattered 

 hairs. 



Flowers regularly pentamerous ; calyx campanulate, like that of U. montana, 

 with five pink lobes ; stamens five, with pink filaments and red anthers ; stigmas white. 

 Samaras not seen. 



This tree is probably identical with the variety 5 of the same name described 

 long ago by Morren ; but this is uncertain. Spath states that it is much 

 esteemed at Magdeburg as a street tree. A tree at Kew, obtained from him in 1900, 

 and now about 25 ft. high, is remarkably fast in growth, and peculiar in its narrow 

 pyramidal habit. Another tree at Kew, labelled U. montana macrophylla fastigiata, 



1 Possibly identical with U. campestris, var. macrophylla, Spach, in Ann. Sc. Nat. xv. 363 (1841). 



2 Cf. Gillekens, Arboric. Forest. 40 (1891). 3 Aigret, in Ann. Trav. Publ. Belg. x. 1230 (1905). 



4 Koch, Dendrologie, ii. pt. i. 417 (1872), states that U. Pitteursii had scabrous branchlets and brownish leaves. Petzold 

 and Kirchner, Arb. Muse. 566 (1864), describe it as having oblong ovate obtuse-toothed dark green leaves, which were reddish 

 brown at the time of unfolding. 



6 U. montana superba, Morren, m/ourn. Agric. Prat. 1848, p. 41 1, is said to have been introduced into Belgium in 1845 

 under the name superba from Osborne's nursery at Fulham. Morren figures a form of U. montana with leaves, up to 10 in. 

 long and 6 in. broad. Morren, who was unacquainted with U. montana, which he believed to be identical with U. peduncu- 

 lata, adds to his otherwise correct account of var. superba a description of the flowers and fruits of U. pedunculata. U, 

 prastans, Schoch, ex Mitt. Deut. Dend. Ges. 1912, p. 227, appears to be a name, without any description, of U. superba, 

 Henry. 



e Specimens sent by Spath, apparently from young trees, have leaves 4 to 5 in. long, 2\ to 3 in. broad, which are said 

 to fall late in autumn. 



