604 
Floristik, Geographie, Systematik etc. 
in many species they become fiiled with amorphous silica. The 
young leaves have in all Bamboos a convolute vernation and tnese 
cells may assist in their unrolling but at maturity they probably 
assist in maintaining rigidity. These bulliform cells occur in all 
Bamboos and in most Grasses on the upper surface only. In some 
Grasses, which are enumerated, they occur on both surfaces and in 
a few genera (Stipa partly, Mibora , Ampelodesma , Distichlis and 
Festuca partly) they are absent altogether. 
The chlorophyll-containing cells are more or less transversely 
elongated and their broader walls are thrown into inwardly pro- 
jecting folds which mostly run at right angles to the surface of 
the leaf. 
In most cases there is a distinct midrib with parallel veins of 
various sizes connected by delicate transverse commissures. Sclerotic 
Strands connect the vascular bundles to both surfaces but are not 
present below the bulliform cells. The vascular bundles are surrounded 
by a double sheat; a single outer layer of cells with cellulose 
walls containing starch and Chlorophyll, within which come one or 
more layers of smaller cells with thick lignified walls. In the 
midrib there are two series of normally orientated bundles; one 
near the under and one near the upper surface. In Melocanna bam- 
busoides some of the upper series are inversely orientated. In the 
neighbourhood of the midrib groups of large thin-walled empty 
cells frequently occur. The upper surface of the leaf is always 
smooth while the lower is rough or haiiy. In the epidermis 
elongated linear cells with undulated walls alternate with short very 
small cells. In the sheathing base of the leaf the apparent cavities 
and bulliform cells are absent and the walls of the mesophyll are 
not folded. 
In conclusion the biological and other peculiarities of the 
Bamboos are discussed and a comparison is made between the leaf- 
structure of several genera of the new tribe Phareae with that of 
the Bamboos. D. T. Gwynne—Vaughan. 
Dünn, S. T., New Chinese Plants. (Journ. of Bot. XLV. N°. 539. 
p. 402—404. 1907.) 
The following species and varieties are described. 
Prunus marginata , P. Fordiana, Loxostigma aureum , and Chi- 
rita sinensis , var. angustifolia from Kwantung; Randia acutidens, 
var. laxiflora, Beilschmiedia Fovdii and Elaeagnus Tutcheri from 
Hongkong, and Saussurea setidens from Korea. J. Hutchinson. 
Fernald, M. L., The representatives of Rumex salicifolius in 
eastern America. (Rhodora. X. p. 17—20. Jan. 1908.) 
From the west-central Californian type and its various Western 
segregates, are differentiated R. pallidus Bigelow of the northern 
Atlantic Seaboard, and R. Mexicanus Meisn., ranging from the 
same region to British Columbia and, through the Rocky moun- 
tain region to Central Mexico, — also reaching southward into 
Maine, Michigan and Missouri. Trelease. 
Foxworthy, F. W„ Philippine woods. (Philippine Journal of 
Science. C. Botany. VII. p. 351—404. ff. 55. Oct. 1907.) 
An economic account, with discussion of structure, ptysical 
