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



1. P. longifolia. 



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

 In Peruvian alpibus. Ruiz et Pavon. 1/ . 



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 Ga:rtner ; 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 Cichoraccce 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 Cichoraccce ; and we shall now proceed 

 to the consideration of the Labia t if one, which constitute a much 

 more numerous and interesting portion of the collection. 



Fam. 2. Labiatiflou;e. Dec. et Lag. 



Flosculi diftbrmes, plerumque tubulosi : limbo saepius bilabi- 



ato-partito, multinervio. 

 Anthers appendicuKi cartilaginea v. callosa, plerumque elon- 



gata terminate, basi biaristatae. 

 Stigmata obtusa, papilloso-pruinosa, rarius partim v. omnino 



connata. 

 Ac hen i a pappo raro clestituta. 

 Plants non lactescentes. Folia alterna. Flores sa;pius pur- 



purei. 



The Labiatiflorce were first proposed as a distinct group by 

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

 "Annates du Mushim." 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, 



