heteroblastic

The first one occurs as medium-grained individuals with heteroblastic to subidioblastic shape (Figure 4), showing characteristic rhombohedral cleavage and polysynthetic twinning.

In general, both processes exhibit changes in leaf morphology; if gradual, it has been described as a heteroblastic series by e.g.

crassifolius), which is a heteroblastic species native to New Zealand.

Heteroblastic features of leaf anatomy in maize and their genetic regulation.

This change of phase may be gradual or abrupt in species termed heteroblastic (Allsopp 1967).

Programmed developmental change, or heteroblastic development, is characterized by development of morphological differences between successively produced organs (Allsopp 1967).

The microscopic features (as observed by optical microscopy) show a predominantly carbonate mineralogy and the textural framework could best be described as heteroblastic. Medium grained (~ 1.0-2.0 mm) carbonate minerals are frequently surrounded by finer (<1.0 mm) grain crystals of similar mineral.

More than a century ago, Goebel (1889) described these species as "heteroblastic" to be distinguished from "homoblastic" taxa, in which changes are negligible or gradual.

Hormonal interactions may, for example, help explain accelerated rates of maturation under elevated C[O.sub.2] observed in some species, including effects on heteroblastic leaf development (Thomas and Bazzaz 1996), reproductive onset (Farnsworth et al.

The methods assay within-plant variance in leaf length, variance around a heteroblastic leaf pattern, and FA in leaf characters.

Vine leaves often demonstrate heteroblastic growth, undergoing changes in morphology from juvenile to adult leaf stages.