Butia soffiae. A. Arched leaves. B. Close-up of an asymmetrical pinna tip. C. Branched inflorescence and congested flowers. D. Rachillae. E. Sepals, connate at the base. F. Petal: ventral view. G. Stamen: lateral view. H. Stamen: dorsal view. I. Close-up of a pistillode. J. Pistillate flower: imbricate sepals. K. Petals, imbricate at the base and valvate at the tip. L. Valvate tip. M. Pistil. N. Fruit: persistent perianth. O. Endocarp pore. A–M from Sant’Anna-Santos 378 (UPCB, holotype), fruit of N and endocarp of O added from habitat photographs. Illustration by Gustavo Surlo.