116 Pteridophyten. — Floristik, Geographie, Systematik etc. 



Matthew, Ch. G., Notes on the Ferns of Hong Kong and 

 the adjacent Mainland. (Priv, printed. Edinburgh-: Douglas and 

 Foulis. 35 pp. 1908.) 



The author gives an annotated list of 147 species and eightgenera, 

 but shows that nine of the older records are either erroneous or 

 require contirmation. The list is the result of four years study and 

 coUection. In the introduction the author describes the phj^sical 

 geography of the island of Hong Kong and of the adjacent main- 

 land so far as concerns the chief stations where ferns are found. 



A. Gepp. 



Anonymus. The forest region of Mount Kenia. (Nature. XLIX. 

 2039. p. 108—9. 1908.) 



Messrs Hutchins (Conservator of Forests) and Ross spent two 

 months (April— June) on Kenia, the snowclad mountain in East 

 Africa. Their object was to ascertain the extent and value of the 

 forest Zone, and the investigation was made at about 4000 metres, 

 near the upper fringe of the forest. The atmospheric conditions were 

 calm and equable from 2000—4100 m., while on the lower slopes 

 and plains at this season the S. E. trade wind blows strongly. The 

 climate is mild and bracing to Europeans especially on the northern 

 plateau, whereas the southern slopes of Kenia were during this, 

 the rainy season, wet and mist3^ Erica arhoren marks the Upper 

 limit of tree-growth on Kenia, and the forest is succeeded by a tall 

 grass-formation. The forest forms a continuous zone round Kenia, 

 with an average breadth of 6 to 9 miles. Jmiiperns procera sometimes 

 30 m. high and 4 m. diam. is the most valuable tree of the forest 

 on- north and west sides. On the S. E. side, this tree is absent but 

 "Ibean camphor" i^name not given) is abundant; there are also 

 valuable non-coniferous trees. Podocarpus thunhergii var. tnilanjiaiius 

 is probably the most abundant timber tree in the Kenia forest; less 

 abundant P. graciUor. W. G. Smith. 



Baumann, E., Beiträge zur Flora des Untersees (Bodensee). 

 (Mitt. bot. Museum eidg. Polytechnikum Zürich. — Mitt. d. thur- 

 gauischen naturf. Gesellsch. XVIII. 1908.) 



Enthält die seltenen oder neuen Formen, die Verf. bei mehrjäh- 

 rigen Studien am Untersee gesammelt hat. Besonders die Gattung 

 Potamogeton (revidiert von Prof. Dr. G. Fischer in Bamberg) hat 

 sehr viel Interessantes geliefert. Es mögen hervorgehoben werden: 

 Potamogeton gramineus X Zisii (neu für Baden und die Schweiz), 

 Pot. gramineus X perfoliatus (= nitens aut.), Pot. vaginatus Turcz. 

 var. helveticiis Fischer, lucens X perfoliatus, ZanichelUa palustris var. 

 repens, Najas minor und namentlich Najas ßexilis Rost, und Schmidt, 

 neu für die Schweiz, Baden und Süddeutschland! (teste 

 Ren die), Alisma graminifolium (Wahlbg). Ehrh. in zahlreichen 

 Formen, Butomus umhellatus, Schoenoplectus supinus, Orchis incar- 

 natus X Traunsteineri , O. incarnatus X maculatus, O. maculatus X 

 Traunsteineri , Thalictriim exaltatuni , Nasturtium amphibium X ^'ipci- 

 rium, Alectorolophus major , A. stenophyllus , Hieracium ßorentinum 

 ssp. assimile, Nitella hyalina, Chara steÜigera, und die merkwürdigen 

 erbsen- bis zwiebelgrossen Kalkknollen der Cyanophycee Schisothrix 

 lateritia, die ganze „Kalkalgenbänke" bilden. 



C. Schröter (Zürich). 



