Table 3.

Qualitative comparison of morphological and isoenzymatic traits between N. antarctica, N. dombeyi and putative hybrids

	N. antarctica	Putative hybrids	N. dombeyi
Vernation	Notably folded	Partially folded	Plane
Lamina
Outline	Ovate	Ovate to lanceolate	Ovate to lanceolate
Bilateral symmetry	Notably asymmetrical (symmetrical)	Asymmetrical (symmetrical)	Asymmetrical (symmetrical)
Base	Cordate to straight	Obtuse to cuneate	Obtuse to cuneate
Dentation	Composed (simple)	Simple (composed)	Simple (composed)
Margin	Crenate-dentate (serrate)	Serrate	Serrate
Types of teeth	A1 (B1)	B1 (A1)	B1 (A1)
Texture	Chartaceous	Chartaceous to coriaceous	Coriaceous
Secondary veins
Thickness	Thick	Intermediate	Thin
Trajectory	Uniformely curved	Straight	Straight to abruptly curved
Angle variation	Dimishing to the apex	Uniform	Increasing to the apex
Division	At some distance from the margin	Close to the margin	Close to the margin
Inter-secondary veins	Absent	Present: simple	Present: composed
Staminate dichasia	One-flowered	One- to three-flowered	Three-flowered
Cupule
Valve outline	Narrowly ovate	Ovate to lanceolate, constricted	Narrowly lanceolate
Lamellae outline	Widely ovate	Ovate	Lanceolate
Isoenzymatic traits
MDH-B*	2	2 and 3	3
MDH-C*	1	1	1
IDH†	1	1	2
SKDH*	2	2 and 3	3
PGI*	2	2 and 3	3
GOT-B*	2	2	2
GOT-C*	2	2	2
6-PGDH‡	2 and 3	1 and 3	1 and 2

Leaf traits are described following Hickey (1973). Conditions in parenthesis are less common than those preceding them.

^*Most frequent allele.

^†Monomorphic loci with different banding pattern.

^‡Most frequent banding patterns.