10 b. Drymaria cordata subsp. diandra (Blume) J. A. Duke, Ann. Missouri Bot. Gard. 48 (3): 253. 1961.

≡ Drymaria diandra Blume, Bijdr. Fl. Ned. Ind. (2): 62. 1825. Type: Indonesia. Java: according to the protologue, “ in paludosus montanis Javae insulae, ” s. d., C. L. Blume 1549 (lectotype, designated by Mizushima 1957, pg. 81: L [L 0038673 image!]; isolectotypes: L [L 0038674 image!], MO [1765827 / 216778 image!]) .

= Drymaria retusa Wight & Arn., Prodr. Fl. Ind. Orient. 359. 1834. nom. invalid. Type: India. Peninsula Ind. Orientalis, s. d., R. Wight 152 (holotype: G [G 00226767 image!]) .

= Drymaria extensa Wall., Fl. Brit. India 1 (2): 244. 1874. nom. invalid. Type: India. Ind. Orient ., 1829, N. Wallich 647 (holotype: G [G 00226769 image!]) .

= Drymaria gerontogea F. Muell., Descr. Notes Papuan Pl. 1 (5): 87. 1877. nom. invalid.

Distribution.

Subspecies of wide distribution throughout Africa, Asia, and Oceania.

Notes.

Drymaria retusa and Drymaria extensa are invalid names because they were merely cited as provisional synonyms of D. cordata and not accepted. Drymaria gerontogea has been considered validly published by various authors (e. g., Duke, 1961). However, it was not definitively accepted at the time of publication. Mueller merely states, “ Should further research prove Blume’s and Macfadyen’s plants distinct, then I would propose the species name D. gerontogea for the former. ”