LINNEAN SOCIETY OF LONPOX. Ixxxix 



(1840), ' Monographia Cycadearum ' (1843), * Systema Piperacea- 

 rum,' ' Genera et Species Cycadearum,' ' Sertum exoticum,' ' Obser- 

 vationes de ovule et embryonibus Cycadearum/ and ' lUustrationes 

 Piperacearum.' 



He became Professor at the Athenaeum at Amsterdam in July 

 1846, and worked zealously at Tropical Botany, at the same time 

 devoting much attention to Fossil Botany. During his residence in 

 Amsterdam he published some important botanical works, viz, : — 



* Analecta Botanica Indica,' three parts ; * Stirpes Surinamenses 

 selectee,' with 65 plates ; and the ' Flora Indise Batavse/ the leading 

 work on the flora of the Indian Archipelago, in four parts. In 

 September 1859 he was appointed Professor in the University of 

 Utrecht, and in 1862 he became Director of the Eojal Herbarium 

 at Leyden. The latter appointment gave him access to the valuable 

 "treasures of this collection, and afforded him the opportunity of ex- 

 hibiting his talent in the description of plants. The result of his 

 labours appeared in the ' Annales Musei Lugduno-Batavi ; ' in its 

 preparation he was assisted by many able colleagues, but took the 

 largest and most difficult share himself. His description of the 

 Japanese plants in the herbarium shows the great value of the mate- 

 rials in his hands ; and a great number of other works prove his 

 indefatigable iodustry — as, for instance, ' Choix de plantes rares 

 ou nouvelles, cultivees dans le Jardin Botanique de Buitenzorg,' 



* Prolusio Florae Jajjonicae,' and other notices of the plants of this 

 remarkable country, such as ' De palmis Arehipelagi Indici,''De 

 Cinchonae speciebus,' &c. He had just finished the first part of a 

 new work, ' Illustrations de la flore de I'Archipel,' when his failing 

 health began to cause his friends anxiety. Although he never had 

 a strong constitution, he was able to perform the duties of his office 

 until about a year ago, when he suffered from repeated attacks of 

 difficulty of breathing. In the course of last summer, being recom- 

 mended to try the effect of change of air, he spent several weeks in 

 the mountainous districts of Thiiringen, with apparently satisfactory 

 results. On his retui'n to Utrecht, in September, the old symptoms 

 reappeared in an aggravated degree ; but he nevertheless continued 

 to work tin the latter end of October, though becoming weaker 

 every day. Three days before his death his physicians discovered 

 that he was suffering from an abscess in the liver, which had pene- 

 trated the lungs. His weakened constitution was unable to bear up 

 against the consequent suffering ; and he died on the 23rd of January, 

 1871, at the age of 59, deeply regretted, not only by his relations, but 

 by his numerous friends and pupils. Besides the important works 



