4.2. Macropsychanthus subg. Platylobium (Benth.) L.P. Queiroz

Dioclea sect. Platylobium Benth., Fl. Bras. 15(1): 164. 1859.

Dioclea sect. Macrocarpon Amshoff, Meded. Bot. Mus. Herb. Rijks Univ. Utrecht 52: 68. 1939. Type [designated by Maxwell, 2011]: Dioclea macrocarpa Huber.

Dioclea subg. Platylobium (Benth.) R.H. Maxwell, Novon 21(2): 232, 2011. Type: based on Dioclea sect. Platylobium Benth.

Type.

[designated by Maxwell, 2011]: Dioclea bicolor Benth. Stipules basifixed, not prolonged below their insertion. Leaves estipellate. Fruit flat, compressed and elastically dehiscent, with twisting woody valves, rarely indehiscent or passively dehiscent and turgid ( M. ruddiae). Seeds with a short and oblong hilum (Fig. 3 G-J).

This subgenus fits the circumscription of Dioclea subg. Platylobium (sensu Maxwell, 2011) with the transfer of Macropsycanthus huberi to the section Macropsycanthus .

Nine species are known from South America, centred in the Amazon and Guyana region and three species extend southward into the Cerrado biome in central Brazil.