| Euphrasia micrantha | NO, Dyranut | John Gregory Hawkes | | 16/8/1963 | BIRM |
| Euphrasia stricta | NO, Vest Fold | John Gregory Hawkes | John Gregory Hawkes | 18/8/1963 | BIRM |
| Symphytum officinale x asperum = S. x uplandicum | GB, VC38 Warwickshire, Sherbourne | John Gregory Hawkes | Flora of Warwickshire Voucher Specimen | 5/5/1957 | BIRM |
+ | Potamogeton compressus | GB, VC38 Warwickshire, Oxford Canal at Napton-on-the-Hill | John Gregory Hawkes | | 7/7/1963 | BIRM |
| Hieracium asteridiophyllum | GB, VC64 Mid-west Yorkshire, Malham | John Gregory Hawkes | | 23/6/1960 | BIRM |
| Dactylorhiza purpurella | GB, VC48 Merionethshire, Harlech | John Gregory Hawkes | | 21/6/1953 | BIRM |
| Salix fragilis | GB, VC38 Warwickshire, Sherbourne | John Gregory Hawkes | | 5/5/1957 | BIRM |
| Salix viminalis x caprea x cinerea = S. x calodendron | GB, VC38 Warwickshire, Shrewley Pool | John Gregory Hawkes | | 5/4/1967 | BIRM |
| Salix viminalis x caprea x cinerea = S. x calodendron | GB, VC38 Warwickshire, Shrewley Pool | John Gregory Hawkes | | 5/4/1967 | BIRM |
| Salix viminalis x caprea x cinerea = S. x calodendron | GB, VC38 Warwickshire, Shrewley Pool | John Gregory Hawkes | | 5/4/1967 | BIRM |
| Alchemilla acutiloba | GB, VC66 County Durham, Tow Law | John Gregory Hawkes | | 20/9/1959 | BIRM |
| Alchemilla glabra | GB, VC66 County Durham, Teesdale,Langdon Beck | John Gregory Hawkes | | 20/9/1959 | BIRM |
| Alchemilla subcrenata | GB, VC66 County Durham, Newbiggin | John Gregory Hawkes | | 20/9/1959 | BIRM |
| Alchemilla xanthochlora | GB, VC65, VC66, Wynch Bridge | John Gregory Hawkes | | 20/9/1959 | BIRM |
| Arabis glabra | GB, VC37 Worcestershire, Hartlebury Common | John Gregory Hawkes | | 18/6/1957 | BIRM |
| Arbutus unedo | IE, VCH2 North Kerry, Killarney,Upper Lake | John Gregory Hawkes | | 24/6/1954 | BIRM |
| Carex echinata | GB, VC48 Merionethshire, Llanbedr | John Gregory Hawkes | | 23/6/1955 | BIRM |
| Carex extensa | GB, VC48 Merionethshire, Mochras Point | John Gregory Hawkes | | 25/6/1953 | BIRM |
| Carex panicea | GB, VC48 Merionethshire, Afon Artro | John Gregory Hawkes | | 23/6/1953 | BIRM |
| Carex viridula subsp. oedocarpa | GB, VC48 Merionethshire, Afon Artro | John Gregory Hawkes | | 23/6/1953 | BIRM |
| Cephalanthera longifolia | IE, VCH1 South Kerry, Glencar | John Gregory Hawkes | | 22/6/1954 | BIRM |
| Cephalanthera longifolia | IE, VCH1 South Kerry, Glencar | John Gregory Hawkes | | 22/6/1954 | BIRM |
| Cephalanthera longifolia | IE, VCH1 South Kerry, Glencar | John Gregory Hawkes | | 22/6/1954 | BIRM |
| Dactylorhiza incarnata subsp. coccinea | GB, VC48 Merionethshire, Harlech | John Gregory Hawkes | | 21/6/1953 | BIRM |
| Eleocharis multicaulis | GB, VC48 Merionethshire, Mochras Point | John Gregory Hawkes | | 23/6/1953 | BIRM |
| Eleogiton fluitans | GB, VC37 Worcestershire, Hartlebury Common | John Gregory Hawkes | | 18/6/1957 | BIRM |
| Epipactis helleborine | GB, VC36 Herefordshire, News Wood | John Gregory Hawkes | | 10/9/1962 | BIRM |
| Festuca ovina | GB, VC63 South-west Yorkshire, Houghton | John Gregory Hawkes | | 27/6/1960 | BIRM |
| Filago minima | GB, VC38 Warwickshire, Bearley | John Gregory Hawkes | | | BIRM |
| Hordelymus europaeus | GB, VC33 East Gloucestershire, Cranham | John Gregory Hawkes | | 7/1964 | BIRM |
| Isolepis cernua | GB, VC48 Merionethshire, Mochras | John Gregory Hawkes | | 23/6/1953 | BIRM |
| Juncus gerardii | GB, VC48 Merionethshire, Harlech | John Gregory Hawkes | | 25/6/1953 | BIRM |
| Juncus kochii | GB, VC48 Merionethshire, Afon Artro | John Gregory Hawkes | | 23/6/1953 | BIRM |
| Juncus tenuis | IE, VCH1 South Kerry, Glencar | John Gregory Hawkes | | 22/6/1954 | BIRM |
| Linaria arenaria | GB, VC4 North Devon, Braunton Burrows | John Gregory Hawkes | | 9/1954 | BIRM |
| Lotus corniculatus | GB, VC48 Merionethshire, Harlech | John Gregory Hawkes | | 1957 | BIRM |
| Luzula multiflora | GB, VC48 Merionethshire, Afon Artro | John Gregory Hawkes | | 23/6/1953 | BIRM |
| Mercurialis perennis | GB, VC37 Worcestershire, Broadmoor Wood | John Gregory Hawkes | | 7/5/1953 | BIRM |
| Narthecium ossifragum | GB, VC38 Warwickshire, Coleshill | John Gregory Hawkes | | 1957 | BIRM |
| Parapholis strigosa | GB, VC48 Merionethshire, Mochras | John Gregory Hawkes | | 25/1/1953 | BIRM |