OF DR. J. R. T. VOGEL. 3 
In these, several new genera are proposed, numerous new 
species are briefly but characteristically described, and many 
already known have received important corrections. In the 
year 1838, in conjunction with Dr. Schleiden, he published 
some greater and lesser treatises, which, for the most part, 
have reference to the same family, in the 19th volume of 
the Acta Acad. Nat. Curiosorum, entitled “ Contributions to 
the history of the development of the parts of the flower in the 
Leguminosae, and on the Albumen, especially of Leguminose,” 
both accompanied by numerous illustrations; and in the 
46th of Poggendorf’s Annalen der Chemie und Physick, on 
** Amyloid, a new vegetable substance.’ At the same time 
appeared, in the 12th volume of the Linnaa, a continuation of 
his labours on the leguminous plants of South America, 
in an Essay on Brazilian Hedysaree. In the year 1839, 
also, he continued his task with his wonted perseverance, 
and in the 13th volume of Linnea, we find two treatises 
connected with it, viz.: on Brazilian Viciee, and observations 
on American Bauhinie. In 1840, he received, for investiga- 
tion, the Leguminose collected by the late Prof. Meyen in 
his journey through Brazil, Peru and China, and the results 
of this labour appear in an Essay in the supplement to the 19th 
volume of the Acta Acad. Nat. Curios. The 15th volume of 
Linnea contains three of his treatises; viz. Remarks on the 
existence of Amylum in Cryptogamous plants; Additions and 
corrections to the Synopsis of the Genus Cassia; and 
Remarks on some species of the genera Thymus and Ori- 
ganum. There is also in Buchner's * Repertorium für die 
Pharmacie, 1840," a Review of the species of the genus 
Origanum and a Description of Thymus coriaceus. Mr. Mar- 
quardt found this undescribed species of Thymus in many 
apothecaries’ shops and collections of Materia Medica, 
amongst stores of Origanum Creticum. 
As Vogel’s position in Bonn rendered a perfect know- 
ledge of the plants in its neighbourhood requisite, pre- 
parations were commenced for a Flora of Bonn ; to which he 
devoted much time, and for which he undertook many 
B2 
