1- 



5. SUMMARY OF THE ADDITIONS AND CHANGES MADE IN THE INTERNA- 

 TIONAL RULES OP BOTANICAL NOMENCLATURE BY THE BRUSSELS 

 CONGRESS. 



Chap. I, general Considerations and Lea^igg Principles . 



Art. 9. The rules and recommendations of botanical nomenclature 

 apply to all classes of the vegetable kingdom, both fossil and 

 liring, unless exeeptions are expressly specified. 



Chap. II. qa6sajQie-8L:^fe^^M^iisaK^Sl^B^UsaJi5i|^ife^>J^tii?j§. 



'Art, 11, We 4istiiiguish also in many species varieties (varietas) 

 forms (forma), among parasites special forms (forma specialis), 

 in certain cultivated species, modifications still more numerous; 

 in many genera sections (sectio), in many families tribes '. 

 { tribus ). 



Art. 12. In the sixth line substitute "22»' for "21" and in the 

 ninth line insert "Forma specialis " between "Forma" and 

 "Individuum". Insert under Art, I2 the. following recommenda- 

 tions. 



Recommendations. 



In the case of parasites:^ and especially of fungous 

 parasites, authors who do not give specific rank to forins differ- 

 ing biologically but which differ little or not at all morpholog- I 

 ically, will distinguish within a species special forms (forma ' 

 specialis, f. sp. ) characterized by their adaptation to different 

 hosts. 



Chap. III. Qn^th(g^J5^|ing3^^jjf 5gsigna$ijgjg^S^chj^roii2^g£ 



Section 2. Point of Departure for nomenclature; limitation of 

 principle of priority. 



Art. 19. Botanical Ifomenclature begins for the various plant 



groups (living and fossil) at the following 'dates; 



a) Phanerogamae and Pteridophyta, 1753 (Linnetfe Species Plant-^ , 



arum ed. I) .V -=^- ^ v^ \ 



b) Muscineae, 1601 (Hedwig, Species Muscorum). '---^^»*^ ^ v 



c) Hepaticae and Sphagnaceae, 1753 ( LinneUs^,c^pepies. Pl^ntarupf'Gn 



d) Lichenes, 1753 (Linneus, Species plantaxum^ed. i)!^"'' 'fiS^ >^^,.^ /| 



