FLORA OF BRAZIL. 459 



double series of involucral scales, but differs in having lanceo- 

 late serrate, not linear entire, leaves, and pilose achsenia. 



Trichogonia, Gardn. 



Kuhnia, Sect. Trichogonia, DC. Prodr. 5, p. 126. Endl. 



Gen. Plant, p. 368. 



Char. Gen. Capitulum multiflorum, involucri squamis 



1-2-serialibus, eequalibus. Receptaculwm nudum, planum. 



Corolla tubulosee, ad faucem ampliatae, extus pilosse. Styli 



rami longe exserti, semiterites, clavati, obtusi. Achcenia 



acute pentagona, ad angulos piloso-scabrida. Pappus 1- 



serialis, plumosus. — Herbae vel suffrutices, in Brasilia et 



America Boreali crescentes, foliis alternis vel rariter oppo- 



sitiSy uninerviis, rarius triplinerviis, linearibus vel ovatis, 



capitulis corymbosis, pedicellatis, corollis pallide purpureis. 



I have here separated and formed into a distinct genus 



De Candolle's second section of the genus Kuhnia, because 



the three species which constitute that section, together with 



three new ones which I find in my Brazilian collections, differ 



from the normal species of the genus in having the involucral 



scales of the same length, the corolla with a widely dilated 



throat, and hairy outside, and the acheenia acutely five-angled, 



with the angles pilose. From Clavigera, which it approaches 



in some respects, Trichogonia differs in the nature of the 



involucrum and acheenia. 



2212. Trich. campestris ; herbacea basi sublignosa ramosa, 

 ramis elongatis striatis pubescentibus ad apicem subcorym- 

 boso-ramulosis, foliis inferioribus late linearibus obtusis in 

 petiolum attenuatis grosse et distanterdentatis, superioribus 

 angustioribus integerrimis, capitulis paucis pedicellatis co- 

 rymbosis sub-20-floris, involucris quamis l-serialibuseequali- 

 bus lineari-oblongis obtusis extus puberulis ad apicem bar- 

 batis 5-nerviis. 

 Hab. Jn open sandy Campos, near the city of Oeiras, Pro- 

 vince of Piauhy, Brazil. Fl. in March and April. 

 Herba erecta, l£ pedalis. Folia majora 2-poll. longa, 



