After pollination the pistillate flower closes and becomes the conelet,
the staminate flowers withering and falling away. The conelet makes no
appreciable growth until the following year. Like the pistillate flower
it may be subterminal or lateral, but a subterminal pistillate flower
may become a pseudolateral conelet by reason of a summer-growth (fig.
40-a). Such a condition may be recognized on the branchlets of the
present, and of the previous year (fig. 40-b), by the very short
internode and short leaves beyond the fruit.
The conelet offers some distinctions of form, of color, and of length of
peduncle, while in some species (sylvestris, caribaea, etc.) its
reflexed position is an important specific character. The most important
distinctions, however, are found in its scales, which may be
1. entire subsection Cembra fig. 41.
2. tuberculate tropicalis, etc. fig. 42.
3. short-mucronate sylvestris, glabra, etc. fig. 43.
4. long-mucronate aristata, contorta, etc. fig. 44.
5. spinescent taeda, pungens, etc. fig. 45.
[Illustration: PLATE III. FLOWERS AND CONELET]
THE CONE. Plate IV.
The cone of Pinus shows great differences of color, form and tissue;
these are useful for specific and sectional distinctions, while the
gradual change from the primitive conditions of the Cembrae to the
elaborate form, structure and mode of dissemination of some serotinous
species are obvious evidence of an evolution among the species of
remarkable taxonomic range. A form new among Coniferae appears, the
oblique cone, and a new condition, the serotinous cone, both appearing
at first alone and, finally, in constant association.
COLOR OF THE CONE.
With few exceptions the color of the ripe cone may be classified under
one of the following shades of brown or yellow.
Nut-brown The stain of the walnut-husk.
Rufous brown A pronounced reddish nut-brown.
Fulvous brown A yellowish nut-brown.
Tawny yellow The color of the lion.
Orange Ochre-yellow to red-orange.
These colors may be paler or deeper. They may be obscured by a fuscous
shade or may be modified by a dull or lustrous surface. The presence of
two or more of these shades in a single species and the inherent
difficulties of color description lessen the value of the character.
Nevertheless certain allied species, such as P. nigra and Thunbergii, or
P. densiflora and Massoniana, may be distinguished by the prevalent
difference in the color of their cones.
DIMENSIONS OF THE CONE.
The cone is small, medium or large in different species, but varies
greatly under the influences of environment or of individual
peculiarities. The character possesses relative value only, for great
variation is possible in the same locality and even on the same tree.
THE PEDUNCLE.
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