David Alan Simpson

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Ficinia nodosa, the knotted club-rush or knobby club-rush, is a rhizomatous perennial in the family Cyperaceae, native to South Africa, Australia, and New Zealand. Widespread in the Southern Hemisphere, Ficinia nodosa grows to between 15 and 220 cm in height. Although it grows best in sandy, salty soil, the plant grows in a wide variety of environments from coastal sand dunes to alpine regions. F. nodosa’s appearance is characterised by dense clusters of long green stems topped with small, rounded flowers often remaining throughout the year.

Hypolytrum subcompositus is a species of plant in the family Cyperaceae. It is endemic to Cameroon. Its natural habitat is subtropical or tropical moist montane forests. It is threatened by habitat loss.

Hypolytrum pseudomapanioides is a species of flowering plant in the family Cyperaceae. It is a perennial or rhizomatous geophyte endemic to the Bakossi Mountains of Cameroon's Southwest Region. It grows in undergrowth in montane tropical rain forest from 1,470 to 1,500 metres elevation. It is threatened by habitat loss.

Cyperus tatandaensis is a species of sedge that is native to parts of Africa.

Cyperus subcastaneus is a species of sedge that occurs in Brazil, where it is found from Bahia to Minas Gerais. The species was first formally described by the botanist David Alan Simpson in 1987.

Cyperus mudugensis is a species of sedge that is native to central and eastern parts of Somalia.

Cyperus microglumis is a species of sedge that is native to eastern parts of Africa.

Cyperus matagoroensis is a species of sedge that is native to south eastern parts of Africa.

Cyperus longispicula is a species of sedge that is native to parts of south eastern Africa.

Cyperus brumadoi is a species of sedge that is native to parts of Brazil.

Cyperus almensis is a species of sedge that is native to Brazil.

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