Registration of Cultivar Names in Ulmus - Arnoldia - Harvard ...

’Cinerea’ (Kirchner in Petzold & Kirchner, Arb. Muscav. 565. 1864, as U. cinerea
Hort., name in synonymy) = ’NIGRA’.
’Clemmeri’ (Lavallee, Arb. Segrez. 235. 1877, as U. campestris var. Clemmeri,
without description) = ’KLEMMER’.
’Cochleata’ (C. de Vos, Handboek 204. 1887 [not seen]) = ’CUCULLATA’.
’COLORANS’ (Kirchner in Petzold & Kirchner, Arb. Muscav. 559. 1864, as U. effusa
var. colorans). Described as turning a beautiful scarlet red in the autumn, not
golden. U. laevis.
’COLUMNARIS’ ( Rehder in Jour. Arnold Arb. 3: 42. 1921, as a form). Described
as a columnar form discovered by Mr. John Dunbar inside a garden wall at
Conesus Lake, New York. U. americana.
’COMMELIN’ (Bosbouwproefstation Baarn ex Boom, Ned. Dendr. 1: 158. 1959,
as a cv.). This cultivar has a fair resistance to Dutch Elm Disease and was
selected for this at the Phytopathology Laboratory "Willie Commelin Scholten"
at Baarn, Netherlands. Derived from a cross between U. X vegeta and a
selected French seedling of U. carpinifolia, made in 1940, at the Laboratory
of Genetics, Wageningen; it differs from ’Vegeta’ in the narrower habit, the
darker gray branches, the duller and brown branchlets, the smaller leaves, the
smaller number of veins ( 9-12 ) and the pilose undersides of the leaves. U. X
vegeta (that is, U. X hollandica var. vegeta sensu Rehder). ..,..
‘CoNCnvAEFOLIA’ (Loudon, Arb. Frut. Brit. 3: 1378. 1838, as U. campestris var.
concavae f olia Hort. ) .
Described as resembling var. cucullata. U. carpinifolia.
’COOLSHADE’ (Sarcoxie Nurseries, Sarcoxie, Missouri, Cat. 1951, p. 6). Originated
in 1946 from the parent tree growing in the Sarcoxie Nurseries, and said to be
of rapid, stocky growth with a compact top resistant to breakage under ice and
snow and foliage a much darker green. Said to be a hybrid of U. pumila X
rubra.
’Cornubiensis’ ([Weston] Boom, Ned. Dendr. 1: 158. 1959, as a cv.). The Cornish
Elm. More correctly placed in the botanical rank of variety: U. angustifolia
(Weston) Weston var. cornubiensis (Weston) Melville ( U. carpinifolia Gled.
var. cornubiensis ( Weston ) Rehder).
’CORNUBIENSIS PARVIFOLIA’ (Boulger in Gard. Chron. II. 12: 298. 1879, as U.
campestris cornubiensis parvifolia, without description). Probably U. angustifolia.
‘CORNUTA’ (David in Revue Hort. II. 4: 102. 1845, as U. campestris cornuta;
Boom, Ned. Dendr. 1: 157. 1959, as a cv. ) .
projections or lobes on the shoulders or apex. U. glabra.
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The large leaves have two long
‘CORYLIFOLIA’ (Host, Fl. Austr. 1: 329. 1827, as U. corylifolia).
Described as
having broad-ovate, scabrid leaves, doubly toothed with broad, obtuse teeth.