20 CLASSE DES COMPOSÉES. 



— Acmella Rich. (Athronia Neck.) — Micractis D« 

 Cand. — Saiwïtalia Cavan. ( Lorentea Orteg. non 

 Less. ) — Anactis De Cand. — Zinnia Llnn. ( Crassina 

 Scopol. ) — Philactis Schrad. — Tragoceras (Tragoce- 

 ros) Kunth. — Hamulium Cass. — Verhesina Linn. — 

 Ximenesia Cavan. 



c) Capitulet radiés; fleurs-radiales neutret. 



Si/nsia Pers. — Oyedœa De Cand. — Encelia A dans. 

 ( Pallasia L'hérit. non Linn. ) — Philoglossa De Cand. 



— Actinomeris Nutt. (Ridan Adans. Pterophyton Cass. 

 Actimeris Rafin.) — Helianthus Linn. ( Vosacan Adans. 

 Corona-solis Tourji.) — Harpalium Cass. — Leighia 

 Cass. — Flourensia De Cand. — Vigiùera Kunth. 



Section IY. BÉLlANTHÉES-aUBBÉCKiXES Cass. 

 Aigrette coroniforme. 



a) Disque androgyni flore ; couronne neutriflore [rarement nulle). 



Tithonia Desfont. — Echinacea Mœneh. ( Braunerla 

 Neck. Bobartia Petiv. non Linn. Helichroa Rafin. ) — 

 Rudbeckia Linn. ( Centrocarpha Don. Obeliscotheca 

 Vaill. Obeliscaria Cass. Lepachys et Ratibida Rafin.) — 

 Dracopis Cass. — AndrieiLxia De Cand. — Anomoste- 

 phium D^ Cand. — Aspilia Petit-Thou. — Gymnopsis 

 De Cand. ( Gymnolomia Kunth, non Ker. ) — Wulffia 

 Neck. (Chakiatella Cass. Chylodia Rich. Gymnoloma 

 Ker. ) — Tilesîa Meyer. — Euxenia Chaniiss. ( Podan- 

 thus Lagasca, non Ilaw. ) 



b) Disrjue androgyniflore ; couronne fétnini flore. 



Ferdinanda Lagasc. — Borrichia Adans. ( Diomedea 

 et Diomedella Cass. Odontosperma Neck. ) — Heliopsis 

 p^fs. — Kallias Cass. — Balsamorhiza Hook. — Pas- 



