New Zealand Journal of Botany abstract
Heteroblasty in Carmichaelia, Chordospartium,
Corallospartium, and Notospartium (Fabaceae - Galegeae) from New
Zealand
P. B. HEENAN
Manaaki Whenua - Landcare Research
P. O. Box 69
Lincoln, New Zealand
Abstract Habit-heteroblasty is described for
Chordospartium, Corallospartium, Notospartium, and most
species of Carmichaelia. Transition from the juvenile to the adult
occurs in the first year after seed germination and is marked by an abrupt
change in stem habit and morphology and in leafiness. Carmichaelia
astonii, C. monroi, C. nana, and C. williamsii pass
from the juvenile to the adult without change. Leaf-heteroblasty occurs in
Chordospartium, Corallospartium, and Notospartium, whereas
the leaves of Carmichaelia are usually of similar shape on juvenile and
adult plants. The orientation of the juvenile stems can be correlated with
ecological preferences. The patterns of heteroblastic development described are
not well correlated with the generic boundaries of the Carmichaelia
complex.
Keywords Fabaceae; Galegeae; Carmichaelia;
Chordospartium; Corallospartium; Notospartium; juvenility;
habit-heteroblasty; leaf-heteroblasty; New Zealand flora
B96040
Received 8 July 1996; accepted 14 February 1997
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