GENETIC RESOURCES OF THE GENUS CORYLUS L. IN THE NATIONAL DENDROLOGICAL PARK “SOFIYIVKA” OF NAS OF UKRAINE - Ecological Consequences of Increasing Crop Productivity - page 163

FIGURE 16.3 The principle scheme of interspecific relations in the genus Corylus (according
to Whitcher I.N. and Wan J., 2001 [23] with changes): A—section Corylus , subsection Corylus ,
fruit cover is well-developed; B—section Corylus, subsection Colurnae , vital form—tree; C—
section Corylus , subsection Siphonochlamys , tubular fruit cover; D—section Acanthochlamys ,
fruit cover is covered with thorns.
In our opinion, this cladograma refl ects the interspecifi c links in the genus Corylus
fairly well, even if it does not include all the recognized species. Comparative analysis
of species with the species names of the genus Corylus collections in the databases
of leading botanical institutions [13], which are indicated here confi rms the suffi cient
representative (as for the species variety) level of cited investigations [23]. At the
same time, C. americana , C. avellana , C. Maxima , and C. yunnanensis were united
into the common group, which is very close to the philogenetics elder group, which
include C. heterophylla and C. heterophylla var. sutchuenensis with the defi nition that
Corylus kweichowensis is supposed to be the synonym of Corylus heterophylla var.
sutchuenensis Franch. All together, they form the subsection Corylus in the section
Corylus with the shrub species and foliage, well-developed fruit cover, which resem-
bles a bluebell. The species of the vital form 'tree' C. chinensis , C. Colurna , and C.
jacquemontii form the subsection Colurnae with the basic species C. chinensis. Sub-
section Siphonochlamys has typical tubular fruit cover is presented with monophilic
group C. cornuta with defi nitions that C. californica (A.DC.) A. Heller is the synonym