Cyrtandra J.R.Forst. & G.Forst. (Forster & Forster 1775)

Olivar, Jay Edneil C., Atkins, Hannah J., Hauenschild, Frank & Muellner-Riehl, Alexandra N., 2020, Cyrtandra argentii, a new species of Cyrtandra (Gesneriaceae) from the Philippines, and a review of the C. villosissima group, European Journal of Taxonomy 676, pp. 1-15 : 4

Genus Cyrtandra J.R.Forst. & G.Forst. (Forster & Forster 1775)

Key to the studied species

1. Mature leaves anisophyllous (i.e., smaller leaves less than half the length of the larger leaves in a pair) ..................................................................................................................... C. ferruginea Merr.

– Mature leaves subequal ..................................................................................................................... 2

2. Indumentum white; inflorescences pendulous and pedunculate ......................................................... ........................................................................... C. argentii Olivar, H.J. Atkins & Muellner sp. nov.

– Indumentum ferruginous; inflorescences erect and subsessile ......................................................... 3

3. Calyx divided almost to the base; corolla red .................................................... C. villosissima Merr.

– Calyx fused for half or more of its length; corolla yellowish green or dull reddish orange ............... ......................................................................................................... C. hirtigera H.J.Atkins & Cronk