| Agrimonia procera | GB, VC38 Warwickshire, Kenilworth | Henry Bromwich | Augustin Ley | 9/1867 | BIRM |
| Agrostis canina | GB, VC38 Warwickshire, Lye Green | Henry Bromwich | Botanical Exchange Club of The British Isles | 7/1888 | ABS |
| Agrostis canina | GB, VC38 Warwickshire, Balsall Common | Henry Bromwich | Botanical Exchange Club of The British Isles Augustin Ley | 8/1894 | BIRM |
| Agrostis canina | GB, VC38 Warwickshire, Balsall Common | Henry Bromwich | Botanical Exchange Club of The British Isles Augustin Ley | 8/1894 | BIRM |
| Agrostis canina | GB, VC38 Warwickshire, Balsall Common | Henry Bromwich | William Hunt Painter William Richardson Linton | 8/1894 | SHYB |
| Agrostis tenuis | GB, VC38 Warwickshire, Claverdon | Henry Bromwich | Augustin Ley | 7/1888 | BIRM |
| Aira caryophyllea | GB, VC38 Warwickshire, Hill Wootton | Henry Bromwich | Charles Bailey Robert Large Baker | 6/1884 | BIRM |
| Aira caryophyllea | GB, VC38 Warwickshire, Hill Wootton | Henry Bromwich | Botanical Exchange Club of The British Isles Charles Bailey Robert Large Baker | 6/1884 | BIRM |
| Aira caryophyllea | GB, VC38 Warwickshire, Leek Wootton | Henry Bromwich | Botanical Exchange Club of The British Isles | 6/1884 | ABS |
| Aira caryophyllea | GB, VC38 Warwickshire, Hill Wootton | Henry Bromwich | Botanical Exchange Club of The British Isles Augustin Ley Robert Large Baker | 6/1884 | BIRM |
| Alisma lanceolatum | GB, VC38 Warwickshire, Birdingbury | Henry Bromwich | | 7/1870 | BON |
| Allium vineale | GB, VC38 Warwickshire, Drayton | Henry Bromwich | Botanical Exchange Club of The British Isles Augustin Ley | 8/1886 | BIRM |
| Alopecurus pratensis x geniculatus = A. x brachystylus | GB, VC38 Warwickshire, Kenilworth | Albert Bruce Jackson Henry Bromwich | Albert Bruce Jackson | 15/7/1900 | MANCH |
| Alopecurus pratensis x geniculatus = A. x brachystylus | GB, VC38 Warwickshire, Kenilworth | Albert Bruce Jackson Henry Bromwich | Albert Bruce Jackson Charles Bailey | 15/7/1900 | MANCH |
| Alopecurus pratensis x geniculatus = A. x brachystylus | GB, VC38 Warwickshire, Kenilworth | Henry Bromwich | Botanical Exchange Club of The British Isles Charles Bailey | 7/1900 | MANCH |
| Alopecurus pratensis x geniculatus = A. x brachystylus | GB, VC38 Warwickshire, Kenilworth | Albert Bruce Jackson Henry Bromwich | | 7/1900 | MANCH |
| Alopecurus pratensis x geniculatus = A. x brachystylus | GB, VC38 Warwickshire, Kenilworth | Henry Bromwich | Botanical Exchange Club of The British Isles Augustin Ley | 7/1900 | BIRM |
| Alopecurus pratensis x geniculatus = A. x brachystylus | GB, VC38 Warwickshire, Chesford Bridge, Kenilworth | Albert Bruce Jackson Henry Bromwich | Albert Bruce Jackson Augustin Ley Botanical Exchange Club of The British Isles | 15/7/1900 | BIRM |
| Alopecurus pratensis x geniculatus = A. x brachystylus | GB, VC38 Warwickshire, Kenilworth | Henry Bromwich | Botanical Exchange Club of The British Isles Augustin Ley | 7/1900 | BIRM |
| Alopecurus pratensis x geniculatus = A. x brachystylus | GB, VC38 Warwickshire, Chesford Bridge, Kenilworth | Albert Bruce Jackson Henry Bromwich | Botanical Exchange Club of The British Isles Albert Bruce Jackson Edward Francis Linton William Hunt Painter | 15/7/1900 | ABS |
| Alopecurus pratensis x geniculatus = A. x brachystylus | GB, VC38 Warwickshire, Milverton | Henry Bromwich | | 1879 | MANCH |
| Alopecurus pratensis x geniculatus = A. x brachystylus | GB, VC38 Warwickshire, Kenilworth | Albert Bruce Jackson Henry Bromwich | Watson Botanical Exchange Club Albert Bruce Jackson Harold Stuart Thompson | 27/7/1902 | BIRM |
| Amaranthus retroflexus | GB, VC38 Warwickshire, Kenilworth | Henry Bromwich | Botanical Exchange Club of The British Isles Augustin Ley | 9/1874 | BIRM |
| Apera spica-venti | GB, VC38 Warwickshire, Guy's Cliffe | Henry Bromwich | Robert Large Baker | 8/1879 | BIRM |
| Astragalus glycyphyllos | GB, VC38 Warwickshire, Whitnash | Henry Bromwich | Augustin Ley | 7/1866 | BIRM |
| Atriplex patula | GB, VC38 Warwickshire, Hatton | Henry Bromwich | Botanical Exchange Club of The British Isles Henry Bromwich | 9/1881 | ABS |
| Atriplex patula | GB, VC38 Warwickshire, Hatton | Henry Bromwich | J Comber | 9/1881 | BIRM |
| Avena fatua | GB, VC38 Warwickshire, Wellesbourne | Henry Bromwich | Charles Bailey | 7/1877 | BIRM |
| Avena fatua | GB, VC38 Warwickshire, Bilton | Henry Bromwich | Botanical Exchange Club of The British Isles | 8/1889 | ABS |
| Avena fatua | GB, VC38 Warwickshire, Myton | Henry Bromwich | | 8/1878 | BON |
| Avena fatua | GB, VC38 Warwickshire, Wellesbourne | Henry Bromwich | | 7/1877 | BIRM |
| Avena fatua | GB, VC38 Warwickshire, Wellesbourne | Henry Bromwich | Botanical Exchange Club of The British Isles Augustin Ley | 7/1877 | BIRM |
| Avena fatua | GB, VC38 Warwickshire, Whitnerth | Henry Bromwich | Botanical Exchange Club of The British Isles Augustin Ley | 9/1881 | BIRM |
| Avena pratensis subsp. longifolia | GB, VC38 Warwickshire, Bishops Tachbrook | Henry Bromwich | Botanical Exchange Club of The British Isles William Hunt Painter | 7/1888 | SHYB |
| Barbarea vulgaris | GB, VC38 Warwickshire, Bishopton | Henry Bromwich | Botanical Exchange Club of The British Isles William Hadden Beeby | 9/1884 | SLBI |
| Barbarea vulgaris var. arcuata | GB, VC38 Warwickshire, Bishopton | Henry Bromwich | Botanical Exchange Club of The British Isles Augustin Ley | 9/1884 | BIRM |
| Brachypodium pinnatum | GB, VC38 Warwickshire, Moreton Morrell | Henry Bromwich | Botanical Exchange Club of The British Isles Charles Bailey | 7/1887 | BIRM |
| Brachypodium pinnatum | GB, VC38 Warwickshire, Milverton | Henry Bromwich | Botanical Exchange Club of The British Isles Charles Bailey | 6/1887 | BIRM |
| Brachypodium pinnatum | GB, VC38 Warwickshire, Milverton | Henry Bromwich | Botanical Exchange Club of The British Isles Augustin Ley | 6/1890 | BIRM |
| Brachypodium pinnatum | GB, VC38 Warwickshire, Leek Wootton | Henry Bromwich | Botanical Exchange Club of The British Isles Augustin Ley | 6/1887 | BIRM |