PDF - Materials of Alexey Shipunov

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E . A . K O S T E T A L .KRENKEs (1933) point of view. We measured all leaves in one (usually top) series from severalshoots in each locality.Figure 1. Main metric characters.The following characters were observed (Fig. 1):(1) TIP.POB: shoot type (0 — ground-based; 1 — trunk-based; 2 — generative);(2) L.MEZHD: length of an internode (from the base of the petiole), mm;(3) L.CHER: length of a petiole, mm;(4) W.LOC: position of a greatest width of a leaf, mm;(5) DIAG: length of the “diagonal” of a lamina i.e. the distance from the lamina base pointto the right apical cut, mm;(6) L.MAX: highest length of a lamina, mm;(7) W.MAX: highest width of a leaf, mm;(8) PARTS: number of the leaf lobes;(9) SMELL: smell type from pulverised leaves (pungent or nutmeg-like) and
L e a f - v a r i a b i l i t y o f W e s t C a u c a s i a n H e d e r a s p e c i e s(10) TRICH: structure of the trichomes (stellate or plate-like).Besides, we calculated some “secondary” characters which utilise measured ones:(a) L.MAX/L.CHER = relative length of petiole;(b) L.MAX/W.MAX = leaf “circularity”;(c) W.LOC/L.MAX = leaf “oblongness” and(d) DIAG/(sqrt(2)*W.MAX) = diagonal fraction, i.e. fraction between “theoreticaldiagonal” (supposing that leaf is round-shape) and real one.Thus we have different group of characters:(i) primary metric characters (L.MEZD, L.CHER, W.LOC, DIAG, L.MAX, W.MAX);(ii) categorical ones (SMELL, PARTS, TRICH) and(iii) secondary metric characters.The analysis of these multivariate data was performed by means of the statistical software R(VENABLES & SMITH 2002).Results & discussionAll primary leaf-based characters, petiole length and internode length are correlated to eachother (Spearman r = 0.5–0.8; p < 0.05). PARTS also correlates with most of leaf-basedcharacters (r ≈ 0.5; p < 0.05). Unfortunately, SMELL is strongly associated with person whoperforms measurements and hereby this character is very subjective. Further investigationsshowed that most people could recognise pungent smell of H. helix, but nutmeg-like smell ofH. colchica is very hard to distinguish. All leaf characters had low correlations (r < 0.4; p
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