203 , Biographical Notice of H. G, Florke. 



Florke has left us two herbaria : the first, that of his youth, 

 is preserved at Berlin by the Society of Naturalists of that city. 

 It contains a great quantity of lichens, and especially an im- 

 mense collection of Cladonics, This herbarium has only a relative 

 value, because it does not contain the types of the last and prin- 

 cipal works of the lichenographer of Rostock. 



The second herbarium of Florke is found in the Museum of 

 the University of Rostock, and is chiefly composed of cryptogams. 

 The lichenological portion alone reckons 130 large "c«/«er5,'' 

 and the genus Cladonia is represented by nearly 50,000 speci- 

 mens ! This collection comprises the true cryptogamic treasures 

 and a quantity of authentic specimens from the most celebrated 

 botanists, of whom I shall only cite Schserer, Mougeot, Von 

 Martins, Acharius, Bory de Saint-Vincent, Sommerfelt, Wah- 

 lenberg, Persoon, Weber, C. Agardh, Fee, Wallroth, and Laurer. 



Works of H. G. Florke, 



1. Repertorium des neuesten und wissenwiirdigsten aus der gesammten 



Naturkunde. Berlin, 1811-1813, 5 vol. in-Svo, cum tab. (A mere 

 compilation.) 



2. In the Berliner Magazin : 



1807. Beurtheilung der bisher angenommenen Arten und Abarten der 



Becherflechten. 1 6 p. in-4to. 



1808. Beschreibung der Capitularia pyxidata. 19 p. in-4to, with a 



plate. 

 1808. Beschreibung der rothfriichtigen deutschen Becherflechten. 15 p. 

 in-4to. 



In these three publications are indicated the ideas on the genus 

 Cladonia which Florke remodelled in his subsequent works. 



1808. Ueber die lange Dauer kryptogamischer Gewachse, p. 208. 



In this interesting notice the age of many corticolar lichens 

 is calculated according to the elongation of the thallus relatively 

 to the annual increase of the trees on which they grow, or 

 according to old dates cut in the thallus of the Hchens them- 

 selves. 



1809. Kleine Lichenflora der Inseln Frankreich undBourbon. 6 p.in-4to. 



(Revue critique des lichens rapportes des iles de France et de 

 Bourbon, par Bory de Saint- Vincent.) 

 1808, 1809, 1810. Lichenologische Berichtungen, oder nahere Bestira- 

 mung einiger wegen ihrer Polymorphic verkannten Flechtenar- 

 ten, 4 parties. 



These dissertations contain long critical and synonymical de- 

 tails concerning the following species : — Lichen frigidus L. fl., 

 Lecidea muscorum Ach., Baomyces rupestris, v. sabuletorum 

 Ach., Lecidea decolor ans Flk., Parmelia incolorata Flk., 

 Lecidea gelatinosa Flk., Lecidea fusco-lutea Ach., Lecidea co- 

 rallinoides Flk., Lecidea immersa Ach., Lecidea fumosa Ach., 

 Verrucaria occellata HfFm., Urceolaria calcarea, tessulata HfFm. 

 et contorta Ach., PateUaria calcarea Htfm., Parmelia amylacea 

 . et Lecidea albo-cccrulescens, Wulf. 



1810. Kritik der Gyrophoren oder Wirbelflechten. 10 p. in-4to. 



