372 Pteridophyten. — Floristik etc. 



saures Kaliphosphat, 1 g Ammonsulfat, 0,3 g kristallisiertes Magne- 

 siumsulfat, je 0,1 g Chlorcalcium und Natriumchlorid und 0,01 g 

 Eisenchlorid. Ferner scheinen einige Tropfen concentrierter Salz- 

 säure auf den Liter das Wachstum stark anzuregen. Die Wurzel- 

 tätigkeit wird jedoch offenbar geschädigt, was Verf. berichtigend 

 erwähnt im Gegensatz zu seinen früheren Angaben. Um die Pflan- 

 zen weiter zu bringen, verpflanzt man sie am besten auf sehr nasse 

 Torfstücke die ausserdem mit obiger Nährlösung übergössen sind. 

 Bei Nephrodium filix tnas var. palaeaceuyn beobachte Verf. Apogamie. 



Boas (Weihenstephan). 



Pickett, F. L., Resistance ofthe prothallia of Camptosorus 

 rhisophylhis to desiccation. (Bull. Torrey Bot. Club. XL. p. 

 641—645. 1913.) 



The experiment of subjecting prothallia to normal drj^ air 

 without direct sunlicht, — continuous conditions approximating the 

 average of varying conditions found in nature, — has shown that 

 the production of mature prothallia under such conditions is possi- 

 ble. The other experiments of subjecting prothallia to more thorough 

 desiccation in the glycerin desiccator and over sulphuric acid show 

 the possibilitj'- of surviving the extreme conditions found in nature. 

 There can remain but little doubt that the drought-resisting cha- 

 racter of the prothallia is a very effective factor in the adaptation 

 of Camptosorus rhisophylhis to its habitat. Jongmans. 



Anonymus, Contributions to the Flora ofSiam. (Kew Bull. 

 Mise. Inform. W. 10. p. 419-433. 1915.) 



The foUowing novelties are recorded : Naravelia siamensis Craib, 

 Clematis siamensis Drummond et Craib, C. Wattii Drummond et 

 Craib, PoJyalthia obtusa Craib, Mahonia siamensis Takeda, Schii-na 

 brevipes Craib, Pentacme tomentosa Craib, Decaschistia intermedia 

 Craib, Bombax Kerrii Craib, StevcuUa Kerrii Craib, Hiptage glabri- 

 folia Craib, Evodia parvißora Craib, Gymnosporia obovata Craib, 

 Cissus Craibii Gagnepain, Tetrastigma qiiadranguhim Gagnep. et 

 Craib, T. siamense Gagnep. et Craib, Dalbergia snccirubra Gagnep. 

 et Craib, Eugenia rupicola Craib, Sonerila Nisbetiana Craib, Homa- 

 liuni {Raconbea) Damrongianum Craib, Tarenna Collinsae Craib, 

 T. pauciflora Craib, T. Vanprukii Craib, Veinionia Garrettiana Craib, 

 Maba castanea Craib, Diospyros cratericalyx Craib, Aqanosma sia- 

 mensis Craib. E. M. Cotton. 



Baker, R. T., A new Croton from New South Wales. (Journ. 

 Proc. Roy. Soc. New South Wales. XLVIII. 3. p. 444— 447. 1 pl. 1914.) 



A systematic description of Croton Maideni is given and it is 

 pointed out that this plant has quite a different facies from that of 

 any Crotoyi described in the section given by Bentham in his 

 Flora Australiensis VI. p. 124: "leaves densely clothed on the 

 underside with stellate, silvery tomentum". The economic aspect 

 of the plant is also dealt with i. e. timber, bark and leaves. 



E. M. Cotton. 



Baker, L., The Macclesfield District. II. Vegetation. (Geo- 



