| 1. | Inflorescence of 2 to many racemes, which are usually devoid of spikelets at base, long and rigid | 2 |
| Inflorescence of 1 to many racemes, if > 1 usually bearing spikelets at base, not long and rigid | 10 | |
| 2. | Spikelets up to 3 mm long (excluding protruding hairs if present) | 3 |
| Spikelets 3.75-6 mm long | 8 | |
| 3. | Spikelets woolly-hairy | 4 |
| Spikelets glabrous or very slightly hairy | 6 | |
| 4. | Lower glume absent or to 0.15 mm long | D. papposa (NT WA QLD) |
| Lower glume more than 0.3 mm long | 5 | |
| 5. | Lower lemma without marginal stiff bristles; spikelets c. 2.5 mm long |
D. ammophila (NSW VIC NT SA WA QLD) D. ammophila var. macrolepis |
| Lower lemma with marginal stiff bristles; spikelets 3-3.5 mm long | D. hystrichoides (NSW NT QLD) | |
|
6. 7. 8. |
Spikelets glabrous | D. nematostachya (NT WA QLD) |
| Spikelets hairy | 7 | |
|
Spikelets slightly hairy; lower glume 0.3-0.4 mm long; lower lemma 5-nerved |
D. benthamiana (NT QLD) | |
|
Spikelets discernibly hairy; lower glume 0.8-0.9 mm long; lower lemma 7-nerved |
D. basaltica (QLD) | |
| Spikelets 5.2-6.9 mm long; most racemes branched | D. porrecta (NSW QLD) | |
| Spikelets 3.8-5.1 mm long; racemes simple | 9 | |
| 9. | Normal 0 false false false MicrosoftInternetExplorer4 Lower lemma hairy and without hollow stiff bristles |
D. divaricatissima var. divaricatissima(NSW VIC NT SA WA QLD) D. coenicola |
| Lower lemma hairy and with hollow stiff bristles | D. divaricatissima var. macractinia (QLD) | |
| 10. | Lower lemma with two prominent hair tufts on either side of midrib |
D. hubbardii (NSW QLD) D. neurachnoides |
| Lower lemma without hair tufts | 11 | |
| 11. | Spikelets with long hairs exceeding spikelet | 12 |
| Spikelets glabrous or hairy, if latter then hairs not exceeding spikelet | 14 | |
| 12. | Annual; inflorescence of 1 raceme | D. gibbosa (NT WA QLD) |
| Perennials; inflorescence of more than 1 raceme | 13 | |
| 13. | Lower glume 1/4 - 1/2 spikelet length, separated to some degree from upper glume |
D. brownii (NSW VIC NT SA WA QLD) D. brownii var. monostachya |
| Lower glume absent or a minute hyaline rim, adjacent to upper glume | D. leucostachya (NSW NT QLD) | |
| 14. | Racemes digitate or subdigitate or inflorescence with a common axis shorter than racemes | 15 |
| Racemes usually single on a common axis usually as long as or longer than racemes | 34 | |
| 15. | Inflorescence with 1-3 racemes | 16 |
| Inflorescence usually with 4 or more racemes | 28 | |
| 16. | Spikelets usually arranged in 3s | 17 |
| Spikelets arranged in pairs | 21 | |
|
17. 18. |
Spikelets usually 2 mm or more in length | 18 |
| Spikelets usually less than 2 mm long | 20 | |
| Raceme axes not winged; upper glume the length of the lower lemma | *D. oraria (NT QLD) | |
| Raceme axes winged; upper glume shorter than the lower lemma | 19 | |
| 19. | Pedicels with a ring of rigid hairs at apex | *D. ternata (NSW TAS) |
| Pedicels without a ring of rigid apical hairs |
*D. ischaemum (NSW VIC SA) Panicum glabrum |
|
| 20. | Plant usually a stoloniferous perennial; upper lemma pale to yellow at maturity; upper glume 5-7-nerved |
D. longiflora (NSW NT WA QLD) D. curvipes, D. eriopelis, D. propinqua, D. speciosa |
| Plant annual; Upper lemma brown to black at maturity; upper glume 3-nerved |
*D. violascens (NSW NT SA WA QLD) D. recta |
|
|
21. 22. |
Spikelets heteromorphic, pedicelled spikelets hairy, sometimes also with bristles |
D. bicornis (NT WA QLD) D. queenslandica |
| Spikelets homomorphic | 22 | |
| Spikelets with bristles |
D. ctenantha (NT SA WA QLD) D. robusta |
|
| Spikelets without bristles | 23 | |
|
23. 24. |
Tufted and erect; lower glume, if present, truncate | 24 |
| Creeping; lower glume, if present, acute | 25 | |
| Annual, with spikelets only slightly heteromorphic | D. stenostachya (NT QLD) | |
| Perennial with short wooly rhizomes and hairy cataphylls; spikelets distinctly heteromophic | D. veldkampiana (QLD) | |
| 25. | Mat-forming perennials with cataphylls | 26 |
| Loose stoloniferous annuals without cataphylls | 27 | |
| 26. | Spikelets less than 2.9 mm long; upper glume 1-2.1 mm long | *D. didactyla (NSW WA QLD) |
| Spikelets more than 2.9 mm long; upper glume more than 2.1 mm long | *D. aequiglumis (NSW SA WA) | |
| 27. | Spikelets 0.6-0.7 mm wide; lower glume absent or less than 0.2 mm long |
D. radicosa (QLD) D. timorensis |
| Spikelets 0.7-1.1 mm wide; lower glume 0.2-0.8 mm long |
*D. ciliaris (NSW TAS VIC NT SA WA QLD) D. adscendens |
|
| 28. | Spikelets less than 2 mm long | *D. violascens (NSW NT SA WA QLD) |
| Spikelets more than 2 mm long | 29 | |
| 29. | Perennials | 30 |
| Annuals | 31 | |
| 30. | Nerves of lower lemma with minute spines | *D. milanjiana (QLD) |
| Nerves of lower lemma smooth | *D. eriantha (WA QLD) | |
| 31. | Spikelets of each spikelet pair different or similar and bristled |
D. bicornis (NT WA QLD) D. queenslandica |
| Spikelets of each pair similar and not bristled | 32 | |
| 32. | Upper glume less than 1/4 spikelet length |
D. setigera (NT QLD) D. pruriens |
| Upper glume at least 1/2 spikelet length | 33 | |
|
33. 34. |
Nerves of lower lemma with minute spines | *D. sanguinalis (NSW VIC TAS SA WA QLD) |
| Nerves of lower lemma smooth |
*D. ciliaris (NSW VIC TAS NT SA WA QLD) D. adscendens |
|
| Racemes usually single | D. sharpeana (QLD) | |
| Racemes digitate | 35 | |
| 35. | Upper glume less than 1/2 spikelet length | 36 |
| Upper glume more than 1/2 spikelet length | 40 | |
| 36. | Lower lemma c. 1/2 as long as spikelet | D. blakei (QLD) |
| Lower lemma ± as long as spikelet | 37 | |
| 37. | Inflorescence with few branches, sometimes 1 | 38 |
| Inflorescence with many branches, at least 8 | 39 | |
| 38. |
Inflorescence with 1-4 branches; lower lemma 5 nerved; upper glume nerveless;leaf blades glabrous to slightly hairy; sometimes with many culm branches fascicled at nodes |
D. breviglumis (NT QLD) |
| Inflorescence with at least 4 branches; lower lemma 7 nerved; upper glume 3 nerved; leaf blades sometimes velverty; culm branches never fascicled at nodes |
D. diminuta (NSW QLD) |
|
|
39. 40.
|
Lower glume absent | D. orbata (QLD) |
| Lower glume present | D. fumida (QLD) | |
| Spikelets glabrous | 41 | |
| Spikelets hairy | 45 | |
| 41. | Upper lemma relatively smooth and reflective | 42 |
| Upper lemma muricate and non-reflective | 43 | |
| 42. | Spikelets 1.8-2 mm long; plants forming a thick stoloniferous sward | *D. abyssinica (QLD) |
| Spikelets c. 1.5 mm long; plant not sward-forming | D. diffusa (NSW VIC QLD) | |
| 43. | Spikelets 1.2-1.5 mm long; habit decumbent | D. minima (QLD) |
| Spikelets from 1.6 mm long; habit erect | 44 | |
| 44. | Upper glume 1/2-4/5 spikelet length |
D. ramularis (NSW QLD) D. tenuissima |
| Upper glume subequal to spikelet length | D. parviflora (NSW QLD) | |
| 45. | Lowermost raceme commonly exceeding 9 cm; leaf-margins bearing distinct spicules | D. lanceolata (QLD) |
| Lowermost raceme branch not exceeding 9 cm; leaf-margins without distinct spicules | 46 | |
|
46. 47. 48. 49. |
Spikelets with short brown hairs, forming a web | 47 |
| Spikelet hairs shorter, not forming a web | 48 | |
| Spikelets 2-2.3 mm long | D. dolleryi (QLD) | |
| Spikelets 2.5-3.5 mm long | D. imbricata (QLD) | |
| Spikelets 2.4-2.5 mm long | D. baileyii (QLD) | |
| Spikelets up to 2 mm long | 49 | |
| Spikelets 20-24 on a typical lowermost primary inflorescence branch; upper glume 5-nerved | D. cowiei (QLD) | |
| Spikelets 40-80 on a typical lowermost primary inflorescence branch; upper glume 3-nerved | D. velutina (QLD) |
Key to Digitaria derived from Henrard 1950; Webster 1983, 1987, Simon 2010
Normal 0 false false false MicrosoftInternetExplorer4 <!--[if gte mso 10]> D. benthamiana (NT QLD)
Taxonomic name: