Pritzel (2nd ed.) On the organs of perspiration in plants, by J. Hedwig.--On the botanical geography of the south-western parts of Europe, by Professor Link.--On the nature and mode of production of the aloes wood, by I. de Loureiro.--On the genera of Orchideae, and their systematic arrangement, by Professor O. Swarz [!]--Genera and species of the natural order of Orchideae, by Professor O. Swarz [!]--Botanical observations, by Dr. M. Borkhausen.--Account of the ule tree, and other trees producing the elastic gum, by Don V. de Cervantes.--Observation on the genera Juglans, Fraxinus, and Quercus, in the neighbourhood of Lancaster in North America, by the Rev. H. C. [!] Mühlenberg. With the remarks of Professor C. L. Willdenow.--Observations on the plant called Erica diaboecia, shewing the necessity of referring it to a different genus and order, by Prof. Jussieu.--Botanical observations, by Frederi [!] Ehrhart