540 Worsdell. — Observations on the Vascular 
is of the normal endarch type, with (relatively to its size) 
well-developed xylem and phloem, and no transfusion-tissue. 
In the lamina it becomes excessively reduced and insignificant, 
acquiring there at the same time well-marked transfusion- 
tissue of (usually) shortly elongated tracheides, rather unequal 
in size. Throughout its course the transfusion-tissue is 
entirely lateral in position, like that in the leaf of Podocarpus ; 
in transverse section the elements are small and compactly 
grouped. 
Taxeae. 
Taxus baccata , L. 
In this plant I was unable to perceive the slightest anato- 
mical evidence for Van Tieghem’s view, that the sporangium 
represents the first leaf of a tertiary axis. On the contrary, 
Celakovsky’s idea that the sporangium is terminal to the 
secondary axis bearing the bract, appears by far the most 
probable theory, and well supported by every character of 
the organs, as well as by the course of the bundles. The 
anatomy of the bundles of the sterile bracts below the 
sporangium is very interesting on account of the presence 
of well-developed centripetal xylem , a tissue which is (quite 
naturally) scarce in the bundles of the foliage-leaves (Fig. 15). 
Taxodineae. 
Sciadopitys verticillata , Sieb. & Zucc. 
The sporangiferous scale of this plant consists, as in 
Cupressineae, of the bract and seminiferous scale very in- 
timately united, but towards the apex the two parts are 
quite distinct, the latter organ extending some distance 
beyond the former. It is thick and fleshy and bears a great 
number of sporangia overlapping one another at its base, and 
on the upper (dorsal) surface (Fig. 16). About three bundles 
leave the central cylinder of the axis, two of which belong to 
