uninodal

For Pines are not sharply divided into multinodal and uninodal species, and no exact segregation of them, based on this difference, is possible.

The Genus Pinus George Russell Shaw 1892

Or a summer-shoot may appear on vigorous branches of any species with the result of converting a uninodal spring-shoot into an imperfect multinodal branchlet.

The Genus Pinus George Russell Shaw 1892

The uninodal spring-shoot may remain so throughout the growing season and become a uninodal branchlet.

The Genus Pinus George Russell Shaw 1892

In the Lariciones the cone is symmetrical, and dehiscent and deciduous at maturity, while the spring-shoot is uninodal.

The Genus Pinus George Russell Shaw 1892

On uninodal shoots they are necessarily subterminal (fig. 34), the lateral pistillate flower being possible only on multinodal shoots (fig. 35) where it is often associated with the subterminal flower (fig. 33).

The Genus Pinus George Russell Shaw 1892

The branchlet, as here understood, is the whole of a season's growth from a single bud, and may consist of a single internode (uninodal, fig. 12-a) or of two or more internodes (multinodal, fig. 13), each internode being defined by a leafless base and a terminal node of buds.

The Genus Pinus George Russell Shaw 1892

All the species, like the Soft Pines, are uninodal and the cones are dehiscent at maturity, but the trend toward the serotinous species is shown in the occasional appearance of the oblique cone as a varietal form of a few species, and in the persistent cone of the last two species of this group.

The Genus Pinus George Russell Shaw 1892

Spring-shoots uninodal in some, multinodal in other species.

The Genus Pinus George Russell Shaw 1892

The second group, the Australes, contains species with small ray-pits, cones dehiscent at maturity and spring-shoots gradually changing, among the species, from a uninodal to a multinodal form.

The Genus Pinus George Russell Shaw 1892

Spring-shoots conspicuously pruinose, uninodal or not infrequently multinodal.

The Genus Pinus George Russell Shaw 1892