Jeffrey . — The Wound Reactions of Brachyphyllunu 393 
Permian onwards). There is accordingly nothing inherently improbable in 
the derivation of the Araucarineae from an Abietineous stock. The modern 
representatives of the Araucarineae, however, occupy a peculiarly isolated 
position among the Coniferales, which has not been made less marked 
by the recent investigations of Penhallow on their anatomy and the very 
interesting results of Thomson, in regard to the growth of the pollen- 
tube through the substance of the ovule-bearing scales, unlike that found 
in any other Conifer, as well as by the discoveries of Thomson and 
Lopriore of numerous nuclei in the pollen-tubes of Agathis and Arait- 
caria. The latter feature is, however, not without parallel in other Coniferous 
genera, since a similar phenomenon has recently been described by Juel in 
Cupressus and indicated by Coker in Podocarpus. It is consequently 
of importance to observe that the ancient Araucarian genus Brachyphyllum 
shows indications of affinity with the venerable family of the Abietineae 
both in ligneous structure and traumatic reactions. The wide gulf which 
separates the existing Araucarineae from other Coniferales, particularly 
from the Abietineae, is to some extent bridged over by this interesting 
extinct Araucarian. That this statement is not less supported by a con- 
sideration of the general normal anatomy of Brachyphyllum , than by 
experimental evidence derived from the study of traumatic phenomena, 
the writer hopes to show in a subsequent contribution. 
Summary. 
1. In three distinct species of Cretaceous Araucarian lignites, referred to 
the genus Brachyphyllum , on the basis of the study of leafy branches with 
structure preserved, traumatic resin-canals have been found similar to those 
which occur as a result of injury in the Abietineae and in the genus Sequoia. 
2. Since these lignites have considerable stratigraphic and geographical 
range, it may be safely inferred that the formation of traumatic resin-canals 
was a constant feature of Brachyphyllum , and distinguishes that genus 
clearly from the modern Araucarineae and their relatives of the Cretaceous, 
which do not form traumatic resin-canals under any circumstances. 
3. The traumatic reactions of the ancient and extinct Araucarian genus 
Brachyphyllum constitute one line of evidence to unite phylogenetically 
the Araucarineous stock with that of the Abietineae, which we now know 
to have been a very ancient order of the Coniferales. 
The writer wishes to offer his sincere thanks to the Director of the 
Botanic Gardens of Buitenzorg, Java, the Director of the Botanic Garden 
of Sydney, N.S.W., the Director of the Botanic Garden of Harvard Univer- 
sity, Dr. L. Cockayne, Christchurch, New Zealand, Dr. Arthur Hollick, 
of the New York Botanic Garden, and to Professor J. B. Woodworth, of 
the Geological Department of Harvard University, for numerous kindnesses 
in the securing of material. 
