Flora of Ecuador No. 77(1): 190(6). Compositae-Heliantheae Part I:genera A-L. 2006. Fig. 15
Robinson, Harold E.
Figure A-E. Dahlia pinnata (Asteraceae). Collection: Lyonnet 838, Russel & Souviron 32, Mexico , Lomas de Mixcoac.; A. Upper stem, with capitula . - Aug 21 2000.
Figure B-D. Dahlia pinnata (Asteraceae). Collection: Paul Russell & Max Souviron 32, Mexico, Tialpam; B. Ray floret C. Disk floret D. Disk floret section with stamens & style. - Aug 21 2000.
Figure E. Dahlia pinnata (Asteraceae). Collection: C.G. Pringle, Mexico, Mexico; E. Achene of disk floret with subtending palea. - Aug 21 2000.