Anatomie. — Biologie. 611 
occupies a place among living Cycads very close to Stangeria 
paradoxa. A. Robertson. 
Stiles, W., The Anatomy of Saxegothaea conspicua Lindl. (New 
Phytologist VII. N°. 8 and 9. p. 209—222. Textfigs. 28—34. 1908.) 
Saxegothaea conspicua is a plant of extremely local distribution, 
occuring only in the Andes of Chili. This suggests that it is an 
old type, a view which is supported by the simplicity of its internal 
structure, as compared with other Conifers. The author concludes 
that it shews relationships on the one hand with the Araucarieae 
and on the other hand with the Podocarpeae. A. Robertson. 
_ 
Thiessen, R., The vascular anatomy of the seedling of Dioon 
edule. (Bot. Gaz. XLVI. 357—380. pls. 23—29. Nov. 1908.) 
The vascular System of the embryo is squarish in transverse 
section, with two opposite corners directed toward the cotyledons. 
A Strand from one of these corners passes up into a eotyledon after 
Splitting into two Strands, and on each side of this is another Strand 
representing half of the vascular tissue of a neighbouring corner. 
Thus a eotyledon is supplied by four Strands of equal size. Subse- 
quent leaves show two central Strands entering directly from the 
hollow stele and two lateral Strands arising from the opposite side 
of the stele and passing around as girdles, as has been described 
for most other cycads. The foliar Strands are endarch at their origin, 
become mesarch, and finally exarch at the leaf-tip; the same is true 
of the eotyledon, except that the exarch condition is not well shown. 
The writer points out that by no means all the centrifugal xylem 
j is secondary xylem. M. A. Chrysler. 
Harshberger, J. W., The comparative leaf structure of the 
sand dune plants of Bermuda. (Proc. Amer. Phil. Soc. XLVII. 
p. 97—110. pls. 1—3. 1908.) 
The different leaf types represented in this flora are described, 
and the relative frequency of the various structural features such as 
double palisade, depressed Stomata, etc., are listed. Among the 
plants described and figured in detail, Conocarpus erectus , showing 
two sorts of leaves, merits particular mention. M. A. Chr} r sler. 
! Harshberger, J. W., The water-storing tubers of plants. (Bull. 
Torrey Bot. Club. XXXV. 271—276. 1908.) 
The tubers of Nephrolepis cordifolia and N. davallioides are 
shown to be devoid of starch and reserve protein and to contain a 
small quantity of a reducing sugar and also tannin vesicles. It is 
inferred that water-storage is the principal function of these tubers. 
The same is true of the storage organs of Asparagus Sprengeri. 
M. A. Chrysler. 
Lindman, C. A, M., Ueber das Blühen von Lamium amplexi- 
caule L. (Arkiv för Botanik. VIII, N°. 5. Stockholm 1908. 25 pp. Mit 
7 Textfiguren.) 
Die Beobachtungen wurden hauptsächlich in der Nähe von 
