256 Floristik und Systematik der Phanerogamen. — Agricultur. 



Keim, F., Dipterocarpaceae. [J o h s. Schmidt, Flora of Koh 



Chang. Part VII.] (Köbenhavn, Botanisk Tidsskrift. 



Vol. XXV. 1902. p. 42—47.) 



Mr. Johs. Schmidt has brought home from the Siamese island,, 

 Koh Chang, 14 species of Dipterocarpaceae, of which Mr. F. Heim 

 has described the following as new to science: Dipterocarpus Schmldtil, D. 

 angiistialatii%, D. parvifolius, Anisoptera marginatoides, Shorea obtusa 

 Wall. var. Koh-changensis, S. robusta Gärtn. var. Schmidtü, S. Henryana 

 Pierre var. rigida, Pentacine suavis A. DC. var. obtusifolia, Hopea 

 Schmidtü, H. siamensis and H. avellanea. C. H. Ostenfeld. 



Holm, T., Studies in the Cyperaceae. XIX. The genus 

 Carex in Colorado. (The American Journal of Science. 

 CLXVI. July 1903. p. 17—44. 2 pl.) 



A synoptical catalogue vvith localities of the species, followed by 

 critical notes, in which the following new names appear: Carex chalcio- 

 lepis, C. chimaphila, C. variabilis sciaphila, C. acutina petroplnla and 

 C. rhomboidea. A tabulation presentation showing the extra territorial 

 distribution of the species is includcd as part of a geographical discussion. 



Trelease. 



Huber, J., Observacöes sobre as arvores de Borracha 



da Regiäo Amazonica. (Boletim do Museu Paraense de 



historia natural e ethnographia. III. July 1902. p. 345 — 369.) 



A revised translation of a paper by the same author in the „Revue 

 des Cultures Coloniales", Nos. 95 and % [vide Bot. Centralbl. XC. p. 44]. 



Trelease. 



Williams, F. N., n Z^^ö^/Z^wß. (Journal of Botany. Vol. XLL 



July 1903. No. 487. p. 232—234.) 



The diagnoses of the genus and its two species is given in Latin,^ 

 füll particulars with regard to the existing herbarium-specimens being 

 added. The genus, which ranges from Caldas and Pedra Branca in 

 Brazil to Buenos Aires in Argentinia, is distinguished from 

 Erythraea and Sabbatia by the connivent stigmatic lobes, from the latter 

 by the iong corollatube. F. E Fritsch. 



ClBOT, [P.j, La question de I'epuisement des forets ä 



caoutchouc. (Journ. d'Agric. tropicale. III. No. 23. 1903. 



p. 147—148.) 



L'auteur signaie la probabilite de I'epuisement des forets <X Hevea bra- 

 siliensis du Bas-Amazone ou plutot I'epuisement des Heveas disse- 

 mines dans !es forets du Bas- Amazone. Exploites depuis trente ans 

 dejä, ces arbres ne donnent plus grand produit; ceux des Tocantins sont 

 epuises. On peut evaluer ä 280000 kilom. carres environ la superficie 

 des forets pouvant renfermer des Heveas; on en exploite des main- 

 tenant environ 140000 kilom. carres. L'auteur recommande de faire des 

 piantations qui formeront une reserve precieuse pour le moment oü les 

 forets ne fourniront plus assez de caoutchouc. C. Flahault. 



Ausgegeben: 15. September 1903. 



Cominissions -Verlag: E. J. Brill in Leiden (Holland). 

 Druck von Gebrüder Gotthelft, Kgl. Hofbuchdrucker in Cassel. 



