| Poaceae | ! |
Danthonia decumbens fo. breviglumis
| Hack. | Oesterr. Bot. Z. 27(4): 123 | 1877 |
| Poaceae | |
Danthonia decumbens var. breviglumis
| (Hack.) Hack. | Cat. Rais. Gramin. Portugal 21 | 1880 |
| Poaceae | |
Danthonia decumbens subsp. decipiens
| O. Schwarz & Bassler | Feddes Repert. 88(7–8): 417 | 1977 |
| Poaceae | |
Danthonia decumbens subsp. decumbens
| | | |
| Poaceae | |
Danthonia decumbens var. decumbens
| | | |
| Poaceae | |
Danthonia decumbens fo. longiglumis
| Hack. | Oesterr. Bot. Z. 27(4): 123 | 1877 |
| Poaceae | * |
Danthonia decumbens var. longiglumis
| (Hack.) Hack. | Cat. Rais. Gramin. Portugal 21 | 1880 |
| Poaceae | * |
Danthonia decumbens var. longiglumis
| Hack. | Oesterr. Bot. Z. 27: 123 | 1877 |
| Poaceae | |
Danthonia decumbens subsp. provincialis
| Bonnier & Layens | Fl. France 364 | 1894 |
| Poaceae | |
Danthonia decumbens var. recticaulis
| E. Rev. ex Debeaux & Dautez | Actes Soc. Linn. Bordeaux 42: 235 | 1888 |