184 Mr. D. Don's Descriptions of new Genera and Species 



1. P. longifolia. 



Tragopogon sp. nova. Herb. R. et P. 

 In Peruvise alpibus. Ruiz et Pavon. V • 



There is no genus with which this can well be compared : it 

 has the involucrum of Tragopogon, and in habit it resembles 

 Cynthia virginica*, the Troximon virginicus of Gsertner ; but the 

 structure of its pappus and florets removes it from every genus 

 to which it bears any affinity. The Scorzonerea are well distin- 

 guished from the rest of Cichoracece by the very short, reniform 

 appendage surmounting the anthers ; that organ in most of the 

 other tribes having an oblong form. This interesting genus 

 concludes the family of Cichoracea ; and we shall now proceed 

 to the consideration of the Labiatiflora, which constitute a much 

 more numerous and interesting portion of the collection. 



Fam. 2. Labiatiflor^:. Dec. et Lag. 



Flosculi difFormes, plerumque tubulosi : limbo saepiiis bilabi- 



ato-partito, multinervio. 

 Anthers appendicuM cartilaginea v. callosd, plerumque elon- 

 , ,:' gata terminatae, basi biaristatae. 

 Stigmata obtusa, papilloso-pruinosa, rarii\s partim v. omnin6 



connata. 

 Ac HEN I A pappo rar6 destituta. 

 Plantae non lactescentes. Folia alterna. Flores saepi^s pur- 



The Labiatijlorce were first proposed as a distinct group by 

 Messrs. DeCandolle and Lagasca in the 19th volume of the 

 '' Annales du MusSum." Professor Lagasca having communi- 

 cated to M. DeCandolle his remarks on this family, together 

 with the essential characters of many new genera belonging to 



* Edinb. New Phil. Journ. 1. c. p. 309- 

 -...--.{ it, 



