Lodgepoles also have special serotinous cones that are coated with a hard waxy substance.    From Wordnik.com.  [Fire ecology fact sheet] Reference

Many boreal trees and other plants show adaptations to fire such as seed dormancy until fire, serotinous cones, fire-resistant bark, and sprouting habit.    From Wordnik.com.  [Arctic boreal forest environments] Reference

Evidence suggests that severe, frequent fires have selected for a distinct genotype of pitch pine, with reduced apical dominance of trees and highly serotinous cones.    From Wordnik.com.  [Atlantic coastal pine barrens] Reference

These are the peculiar serotinous cones of the genus.    From Wordnik.com.  [The Genus Pinus] Reference

Cones tenaciously persistent, serotinous in various degrees.    From Wordnik.com.  [The Genus Pinus] Reference

The third group, the Insignes, contains the serotinous species.    From Wordnik.com.  [The Genus Pinus] Reference

The serotinous habit is more pronounced in this than in any other species.    From Wordnik.com.  [The Genus Pinus] Reference

By its close resemblance it may be considered the serotinous form of P. virginiana.    From Wordnik.com.  [The Genus Pinus] Reference

Insignes the cone is oblique, persistent and serotinous, and the spring-shoot is multinodal.    From Wordnik.com.  [The Genus Pinus] Reference

But with the serotinous cones (radiata, attenuata), the advantages of this form become apparent.    From Wordnik.com.  [The Genus Pinus] Reference

This group combines the dehiscent cone of the Lariciones with the wood-anatomy of the serotinous Pines.    From Wordnik.com.  [The Genus Pinus] Reference

It is recognized by its oblique cones, conspicuously spinose, indefinitely persistent and very serotinous.    From Wordnik.com.  [The Genus Pinus] Reference

Here also appear a new form of fruit, the oblique cone, and a new method of dissemination, the serotinous cone.    From Wordnik.com.  [The Genus Pinus] Reference

It is one of the associated six timber-Pines of the Southern States and the only one of them with serotinous cones.    From Wordnik.com.  [The Genus Pinus] Reference

The persistent cone, the first stage of the serotinous cone, is equally sporadic in the earlier stages of evolution.    From Wordnik.com.  [The Genus Pinus] Reference

Among the Insignes are a few species with symmetrical cones, and two with cones that are rarely, if ever, serotinous.    From Wordnik.com.  [The Genus Pinus] Reference

The serotinous cone is a gradual development, wanting in most species, rare in a few, less or more frequent in others.    From Wordnik.com.  [The Genus Pinus] Reference

Like the persistent cone, the oblique cone finds in association with the serotinous cone a definite reason for existence.    From Wordnik.com.  [The Genus Pinus] Reference

With all serotinous species that I have seen, some of the trees open their cones at maturity, others at indefinite intervals.    From Wordnik.com.  [The Genus Pinus] Reference

The cones are rarely serotinous, but it is remarkably like P. serotina in many characters, and is therefore placed in this group.    From Wordnik.com.  [The Genus Pinus] Reference

It is never associated with P. rigida, but its resemblance to that Pine is so great that it may be regarded as its serotinous form.    From Wordnik.com.  [The Genus Pinus] Reference

Evolutionary variation is associated with the gradual appearance of the persistent, the oblique and the serotinous cone, and of the multinodal spring-shoot.    From Wordnik.com.  [The Genus Pinus] Reference

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.    From Wordnik.com.  [The Genus Pinus] Reference

But the characters that finally culminate in a lateral oblique serotinous cone are so gradually and irregularly developed that they offer no divisional distinctions.    From Wordnik.com.  [The Genus Pinus] Reference

The spring-shoot is uninodal in all Soft Pines and in many Hard Pines, but, in P. taeda and its allies and in species with serotinous cones, it is more or less prevalently multinodal.    From Wordnik.com.  [The Genus Pinus] Reference

New forms, however, are gradually evolved -- the seed with a thick wing-blade, the indurated oblique cone, the serotinous cone with its intermittent seed-release, and the multinodal spring-shoot.    From Wordnik.com.  [The Genus Pinus] Reference

Cones from 5 to 8 cm. long, reflexed, ovate-conic, symmetrical, persistent, often serotinous; apophyses lustrous nut-brown, elevated along a transverse keel, the umbo forming a triangular persistent spine.    From Wordnik.com.  [The Genus Pinus] Reference

The remarkable variation in the species may be attributed partly to this adaptability, partly to a participation, more or less pronounced, in the evolutionary processes that culminate in the serotinous Pines.    From Wordnik.com.  [The Genus Pinus] Reference

The oblique cone is a gradual development among the Hard Pines; in some species it is associated as a varietal form with the symmetrical cone, and finally, in some serotinous species, it is the constant form.    From Wordnik.com.  [The Genus Pinus] Reference

In fact there is, in Pinus, an evolutionary tendency toward multinodal growth, with its beginnings in the summer-shoot and its culmination in the multinodal winter-bud, most prevalent among the serotinous Pines.    From Wordnik.com.  [The Genus Pinus] Reference

I have assumed the cone to be dehiscent at maturity and have placed it with the Lariciones, but if further information shows the cone to be serotinous, this species should be transferred to the serotinous group.    From Wordnik.com.  [The Genus Pinus] Reference

In Pinus, however, the gradual appearance of the persistent cone, for it is rare, common, prevalent or invariable in different species, and its essential association with the serotinous cone, suggest an evolution toward a definite end.    From Wordnik.com.  [The Genus Pinus] Reference

Cones from 8 to 12 cm. long, ovate-conic, symmetrical or subsymmetrical, persistent, often serotinous; apophyses red with a lighter or deeper brownish shade, lustrous, flat, convex or low-pyramidal, radially carinate, the umbo often ashen gray and unarmed.    From Wordnik.com.  [The Genus Pinus] Reference

Cones serotinous 53. clausa.    From Wordnik.com.  [The Genus Pinus] Reference

Cones serotinous 55. serotina.    From Wordnik.com.  [The Genus Pinus] Reference

4. persistent and serotinous. and as to its form.    From Wordnik.com.  [The Genus Pinus] Reference

Cone, apophysis of, 10 bast tissues of, 14 color of, 8 dimensions of, 8 oblique, 10 peduncle of, 8 persistent, 8 phyllotaxis of, 12 serotinous, 14 symmetrical, 10.    From Wordnik.com.  [The Genus Pinus] Reference