122 
Floristik, Geographie, Systematik etc. 
but in the successively higher branches the internode sub-curve 
changes from the ascending-descending form to a purely descend- 
ing one, while the displacement sub-curve tends to do likewise, or 
does so, at a later stage. To test this theory of displacement, refe- 
rence was made to the admitted case of displacements of branches 
above their leaf-axils in Boraginacecie. The resultant displacement 
curve of the branches above their subtending leaves is of startling 
regularity, and conforms in type with the displacement sub-curve 
of the leaves on the chenopodiaceous main stem. These fixed (here¬ 
ditär}^) displacements in Chenopodiaceae and Boraginaceae follow 
the same rule in respect to their distribution and relative dimen- 
sions as that formulated by De Vries in respect to anomalies and 
monstrosities. 
The same method is applied to investigate the phyllotaxis of 
Boraginaceae, Solanum, and species of Lysimachia and Oenothera that 
display fluctuating leaf-displacements. Incidentally the question of 
“double-leaves”, also the light that they, together with the graphic 
method, shed upon the transmission of morphogenous impulses, are 
discussed. The facts established enable the author to formulate cer- 
tain conclusions regarding the theory of construction of the stem. 
Finally the same graphic method is employed to elucidate the pre- 
cise morphological nature of sympodes of Petunia, Myosotis, and 
Ampelopsis. P. Groom. 
Hayata, B., Flora Montana Formosae, an Enumeration of 
the Plants found on Mt. Morrison, the Central Chain, 
and other mountainous Regions of Formosa at Altitude of 
3,000—13,000 ft. (Journal of the College of Science, Imperial 
University, Tokyo, Japan. Vol. XXV. Art. 19. 1908. 260 pp. with 
41 plates and 16 woodcuts.) 
In the year 1905, Prof. J. Matsumura and the present author 
jointly published an enumeration of plants found in Formosa, in- 
cluding about two thousand species of flowering plants, ferns and 
their allies. At that time, the collections, with the exception of a 
few sets of plants found on Mt. Morrison, did not extend to ele- 
vations of any great altitude. It is, therefore, quite proper to regard 
it as an enumeration of the flora of the lower districts. On the bo- 
tany of the mountain zone, there was no special publication, except 
a few papers that have appeared in the Tokyo Botanical Magazine. 
In this work, the author has endeavoured to give some com- 
plete information relating to the mountain zone of the island. The 
majority of the collections, which the writer worked up, were made 
by the officers of the Government of Formosa. The mountain zone 
treated in this work embraces a most extensive area from 3,000 ft. 
up to 13,000 ft. above sea-level, including in its centre Mt. Mor¬ 
rison, lying a little within the tropic of Cancer and attaining a 
height of 13,120 ft. The plants enumerated here are 392 species 
belonging to 79 families and 266 genera. Most of the species are 
northern elements. 
In the introductory part of this work the author has especially 
called attention to the comparaison of this flora and the floras of 
the neighbouring countries. In order to pursue this end, he has 
given a complete list of the plants with indications as to their dis- 
tributions. Arctic, antarctic, and alpine, elements are more or less 
numerously represented in this flora. Elements of Tropical Ame¬ 
rica, North America, the Himalayas. and Malaya, are shown 
