Prockiopsis

Schatz, George E. & Lowry Ii, Porter P., 2003, Two new species of Prockiopsis Baill. (Achariaceae) from Madagascar, Adansonia (3) 25 (1), pp. 45-51 : 46-47

Key to the species of Prockiopsis

1. Stems gray puberulous; margins of leaves entire; inflorescences 1-flowered; bracts arranged in 14-15 decussate, tightly imbricate pairs; pedicel golden villous; calyx exterior densely golden sericeous .......... 3. P. orientalis

1’. Stems glabrate; margins of leaves serrate to serrulate and often spinose, occasionally entire; inflorescences 2-10-flowered; bracts not distinctly decussate-imbricate; pedicel glabrous to very sparsely puberulous; calyx exterior sparsely sericeous ........................................................................................................................ 2

2. Bracts arranged in distinct groups along an elongate rachis, separated by visible internodes, triangular to ovate, densely sericeous in flower; calyx exterior with a distinct tuft of dense, erect, encircling trichomes at the base ................................................................................................................................ 1. P. calcicola

2’. Bracts densely clustered on a contracted rachis, nearly always obscuring the internodes, acicular to narrowly triangular, sparsely sericeous in flower; calyx exterior lacking a tuft of trichomes at the base ........................ ...................................................................................................................................... 2. P. hildebrandtii