| Species | Aira praecox (Early Hair-grass) |
| Genus | Aira (hair-grasses) |
| Tribe | Poeae (a tribe of grasses) |
| Subfamily | POOIDEAE (a subfamily of grasses) |
| Family | POACEAE (grasses, couch) |
| Order | POALES (grasses, sedges & rushes) |
| Class | MAGNOLIOPSIDA (flowering plants) |
| Phylum | TRACHEOPHYTA (vascular plants) |
| Kingdom | PLANTAE (plants) |
| Domain | Eukaryota (eukaryotes) |
| Life | BIOTA (living things) |
| Records of Aira praecox (Early Hair-grass) : | ||||
| 1: Aira praecox (Early Hair-grass) | ||||
| 27 May 2001 | OSGR: SU84 | 51° 10’ N, 0° 50’ W | Vice County: Surrey (VC 17) | England |
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| 2: Aira praecox (Early Hair-grass) | ||||
| 22 May 1998 | OSGR: SU36 | 51° 20’ N, 1° 30’ W | Vice County: Berks (VC 22) | England |
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Aira praecox (Early Hair-grass) may be included in identification literature listed under the following higher taxa:
 NBN (data.nbn.org.uk)
has a distribution map for Aira praecox (Early Hair-grass)
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 BioInfo (www.bioinfo.org.uk)
has 0 host/parasite/foodplant and/or other relationships for Aira praecox (Early Hair-grass)
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