Mecardonia reneeae, Greppi & Sosa, 2017

Greppi, Julián A., Sosa, María De Las Mercedes & Dematteis, Massimiliano, 2017, A new polyploid species of Mecardonia (Gratioleae, Plantaginaceae) from South America, Phytotaxa 303 (3), pp. 264-270 : 268

Key to M. reneeae and similar species

1. Stems prostrate, radicants, stoloniferous, sometimes with erect or ascending branches born from the prostrate stems. Root system not gemmiferous. Leaves entire. ........................................................................................................ M. procumbens var. flagellaris

- Stems erect, not radicants, gemmiferous root system. Leaves serrate. ........................................................................................... 2

2. Leaves herbaceous, narrowly elliptical, concolorous. Bracteoles 3–5 × 0.5–1.5 mm. Pedicels up to 35(–40) mm. Dorsal sepal 1–1.2 mm wide. Capsule 3–5 × 1.5–1.8 mm. ............................................................................................................................. M. reneeae

- Leaves slightly succulent, ovate to broadly elliptical, discolorous. Bracteoles 6–12 × 2–4 mm. Pedicels up to 65 mm. Dorsal sepal 1.5–2 mm wide. Capsule 5–6 × 3–3.5 mm ................................................................................................................. M. kamogawae