Lindernia oblongifolia (Baker) Eb.Fisch. comb. nov. (Figs. 7–8).

Ilysanthes oblongifolia Baker (1882: 221)

Type: — MADAGASCAR. Central Madagascar, Parker s.n., (Holotype K000379627!) .

Lindernia paludosa (Bonati 1926: 5) Fischer (1995: 245) syn. nov. (Fig. 9)

Ilysanthes paludosa Bonati

Type: — MADAGASCAR. Centre / Ouest: Zazafotsy (bassin de la Menanara) marais, rizières, gneiss, vers 700 m. alt., September 1911, H.Perrier de la Bâthie 8495 (Holotype P00057089!, isotype P00057090!) .

Ilysanthes longipes Bonati (1926: 7)

Type: — MADAGASCAR. Centre: sur les chemins, très abondant autour du massif d’Andringitra, 800–1400 m. alt., January 1922, H.Perrier de la Bâthie 14324 (Holotype P00057081!, isotypes P00057082!, P00057083!) .

Ilysanthes macrantha Bonati (1926: 6)

Type:— MADAGASCAR. Type: — MADAGASCAR. Ouest: marais salants, environs de Soalala (Ambongo), June 1903, H.Perrier de la Bâthie 1554 (Holotype P00057084!, isotypes P00057085!, P00057086!) .

Ilysanthes macrophylla Bonati (1926: 8)

Type:— MADAGASCAR. Ouest: boues du Menarandra, aussi sur les limons d’autres fleuves de la côte Ouest, June 1910, H.Perrier de la Bâthie 8497 (Holotype P00057087!, isotype P00057088!) .

Ilysanthes perrieri Bonati (1926: 11)

Type:— MADAGASCAR. Centre: Horombe. rizière, 1000 m. d’alt. June 1919 1911, H.Perrier de la Bâthie 12684 (Holotype P00057097!, isotype P00057098!) .

Note: — Fischer (1995) considered Ilysanthes oblongifolia Baker as a synonym of Lindernia rotundifolia (Linnaeus 1771: 174) Alston (1931: 214) . Careful examination of the type specimen (Fig. 8), however, revealed that Ilysanthes oblongifolia is the correct name for Lindernia paludosa (Fig. 9). The necessary combination is made above.

Additional specimens examined: — MADAGASCAR. Lac Mantasoa, 9 April 2007, E.Fischer s.n. (TAN, KOBL).