Siderasis zorzanellii M.Pell. & Faden. A habit, showing an immature individual B habit, showing a mature individual spirally ascending a tree C detail of a secondary branch, showing distichously-alternate, asymmetric leaves D detail of an axillary inflorescence, in the primary branch E detail of a terminal inflorescence, at pre-anthesis, in a secondary branch F detail of a terminal inflorescence, at anthesis, in a secondary branch, showing an open male flower G side view of a male flower, showing the unequal and sigmoid stamens H side view of a post-anthesis bisexual flower, showing the bent style I detail of the inflorescence bearing two mature capsules J dorsal and ventral view of the seeds, showing the rugose testa, cleft towards the semidorsal embryotega, and the C-shaped hilum. Photographs by J.P.F. Zorzanelli.