Paspalum sect. Pectinata, Chase ex Rodriguez, 1992

Delfini, Carolina, Souza, Vinicius Castro & Zuloaga, Fernando Omar, 2017, Taxonomic revision and nomenclatural update of Paspalum sect. Pectinata (Poaceae, Panicoideae, Paspaleae), Phytotaxa 323 (1), pp. 1-26 : 5

Key to the species of Paspalum sect. Pectinata :

1. Spikelets paired, but the secondary spikelet rudimentary .............................................................................. Paspalum reticulinerve

- Spikelets strictly solitary....................................................................................................................................................................2

2. Upper glume not winged....................................................................................................................................................................3

- Upper glume winged..........................................................................................................................................................................4

3. Annual; culms nodes geniculate; spikelets 4–4.4 mm long ......................................................................... Paspalum cachimboense

- Perennial; culms nodes not geniculate; spikelets 4.8–7.3 mm long................................................................. Paspalum lanciflorum

4. Lower lemma not winged..................................................................................................................................................................5

- Lower lemma winged.........................................................................................................................................................................6

5. Inflorescences with 2–3 racemes; upper glume lanceolate ............................................................................... Paspalum pectinatum

- Inflorescences with 5–10 racemes; upper glume ovate....................................................................................... Paspalum cordatum

6. Blades linear ..................................................................................................................................................... Paspalum imbricatum

- Blades lanceolate................................................................................................................................................................................7

7. Rachis 1.3–2.3 mm wide ................................................................................................................................ Paspalum reticulinerve

- Rachis 2.9–4.5 mm wide .................................................................................................................................... Paspalum aspidiotes