Dimeria Brown 1810

Key to Thai species of Dimeria 1. Racemes solitary................................................................................................................................................................................2. - Racemes more than one.....................................................................................................................................................................4. 2. Spikelets 4.5–5 mm long. Rhachis 0.8–1.2 mm wide....................................................................................... D. kurumthotticalana - Spikelets 3–4 mm long. Rhachis 0.4–0.7 mm wide..........................................................................................................................3. 3. Upper glumes wingless........................................................................................................................................................... D. kurzii - Upper glumes winged......................................................................................................................................................... D. sinensis 4. Racemes with filiform rhachis............................................................................................................................................ D. velutina - Racemes with flattened or triangular rhachis....................................................................................................................................5. 5. Spikelets 1–3(–4.5) mm long; upper glumes wingless. Rhachis 0.2–0.4 mm wide.................................................... D. ornithopoda - Spikelets 4–6 mm long; upper glumes winged. Rhachis 0.6–1.2 mm wide......................................................................................6. 6. Upper glumes broadly winged. Wings rugose........................................................................................................................ D. kerrii - Upper glumes narrowly winged. Wings not rugose..........................................................................................................................7. 7. Rhachis 0.7–0.8 mm wide, rhachis internodes 1.5–2(–2.5) mm long. Upper glumes acute, narrowly winged all along the keel.............................................................................................................................................................................................. D. fuscescens - Rhachis 0.8 − 1.2 mm wide, rhachis internodes 0.8–1.5 mm long. Upper glumes acuminate to long acuminate and slightly recurved, narrowly winged in the upper one third of glume to the apex........................................................................... D. kurumthotticalana
Published as part of Teerawatananon, Atchara, Boontia, Veeraya, Chantarasuwan, Bhanumas, Hodkinson, Trevor R. & Sungkaew, Sarawood, 2014, A taxonomic revision of the genus Dimeria (Poaceae: Panicoideae) in Thailand, pp. 137-147 in Phytotaxa 186 (3) on page 138, DOI: 10.11646/phytotaxa.186.3.2, http://zenodo.org/record/5147015