Floristik, Geographie, Systematik etc. 
603 
trichophyllus , Chaix. Viola lutea, Carduus nutans (once found as a 
casual), Meutha arvensis, and Scirpus acicularis. 
A number of new records for the county are noted, of species 
and of forms or varieties of critical types, such as rectus, Bor., 
pumilus , R. & F., Steveni, Andrz., Friesianus , R. & F. in two forms, 
all under Ranunculus acris, L., Elatine hexandra, L., Oxalis Aceto- 
sella , L., Taraxacum spectabile , Dahlst. (not previously known except 
from the Faroes), Rhinanthus groenlandicus , Chabert, (another 
plant of the Faroes), Euphvasia curta f. piccola, Towns., Plantago 
lanceolata L., var. depvessa Rostr., Atriplex laciniata L. Salix Capvea, 
L., conlined to small islands in a loch, Carex vesicaria , L., Asple- 
nium Ruta-muraria , L. , A. Trichomanes, L., & Isoetes echinospora, 
L., besides a few others of less note. The evidence for the existence 
in Shetland of Betula alba, L., Ainus glutinosa, L., and Corylus 
Avellana j L., in recent times is discussed, and summed up in favour 
of their having grown there in the course of last Century, though 
not known to still exist locally. Much new information is given 
about the habitats of species already on record from the islands. 
A valuable and suggestive discussion of the destruction of the native 
flora of the small islands (holms) in the lochs with the much poorer 
flora of the places accessible to the animals and near dwelling. 
S. W. H. Trail. 
Birger, S., Rügen som exkursionsort för svenska botani- 
ster. (Svensk botanisk Tidskr. I. H. 4. p. 364—372. Mit 4 Textfig. 
1907.) 
Verf. schildert Vegetation und Flora der Stübnitz auf Rügen. 
Wo der Buchenwald auf dem Kalkplateau am dichtesten steht, ist 
der Unterwuchs sehr arm an Arten; charakteristisch ist hier die 
Fagus silvatica- Asperula odorata- Neottia- Formation. An den Stellen, 
wo die Ueberschattung nicht so stark ist, finden sich viele Arten, 
bilden aber keine konstant zusammengesetzten Vereine. 
An den Schutthalden tritt die Vegetation teils als Laubwiesen, 
gewöhnlich mit geschlossenem Baumbestand, teils als Gestrüpp auf; 
beide Typen sind reich an Sträuchern und anderen Bäumen als 
Fagus, sowie auch an Kräutern und Gräsern. 
Für die Kalksümpfe charakteristisch ist eine Equisetum maxi- 
mum- Carex pendula- Eupatorium-Vovmixtion. 
Grevillius (Kempen a/Rh.) 
Brandis, D., Remarks on the structure of Bamboo leaves. 
(Trans. Science Soc. VII. 5. p. 69-92. Plates 11 — 14. 1907.) 
An account of the general structure of the leaves of the 
Bamboos based on the examination of 122 species belonging to 21 
genera. One of the most striking characters of the leaf as seen in 
transverse section is the presence of a succession of large apparent 
cavities in the mesophyl. Each of these really represents a longitu¬ 
dinal series of flat plate-like transversely elongated cells with thin 
cellulose with no contents which at maturity become quite collapsed. 
Longitudinal bands of specialized epidermis cells occur at intervals 
in the upper epidermis called bulliform cells (“Gelenkzellen” of 
Tschirch, “Motor-cells” of Marshall Ward). In the young leaf 
they occur at the bottom of furrows, but later they enlarge very 
much and project outwards. Their walls remain thin and cellulose 
and they are at first apparently without contents. Later, however, 
