| Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC83 Midlothian, Union Canal | Robert Kidston | Botanical Exchange Club of The British Isles Charles Bailey | 1897 | MANCH |
| Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC86 Stirlingshire, Falkirk | Robert Kidston | Botanical Exchange Club of The British Isles Charles Bailey | 1/9/1897 | MANCH |
| Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC86 Stirlingshire, Falkirk | Robert Kidston | Alfred Fryer Charles Bailey | 1/9/1897 | MANCH |
| Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC86 Stirlingshire, Falkirk | John Stirling Stirling Robert Kidston | Alfred Fryer Arthur Bennett | 8/1894 | MANCH |
| Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC86 Stirlingshire, Falkirk | John Stirling Stirling Robert Kidston | Augustin Ley Alfred Fryer | 8/8/1892 | BIRM |
| Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC86 Stirlingshire, Falkirk | John Stirling Stirling Robert Kidston | Alfred Fryer | 24/8/1894 | SLBI |
+ | Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC86 Stirlingshire, Falkirk | Robert Kidston | | 8/8/1892 | BIRM |
| Potamogeton perfoliatus x crispus = P. x cooperi | GB, VC86 Stirlingshire, Falkirk | John Stirling Stirling Robert Kidston | Botanical Exchange Club of The British Isles | 1/9/1897 | ABS |
| Potamogeton polygonifolius | GB, VC86 Stirlingshire, Killearn | John Stirling Stirling Robert Kidston | Alfred Fryer | 2/8/1897 | E |
+ | Potamogeton polygonifolius | GB, VC87 West Perthshire, Dunblane | Robert Kidston | | 2/9/1884 | PTH |
+ | Potamogeton polygonifolius | GB, VC87 West Perthshire, Lake of Menteith | Robert Kidston | | 26/8/1884 | PTH |
| Potamogeton pusillus | GB, VC87 West Perthshire, Lake of Menteith | Robert Kidston | Robert Kidston | 26/8/1884 | DBC |
| Potamogeton trichoides x crispus = P. x bennettii | GB, VC86 Stirlingshire, Grangemouth | John Stirling Stirling Robert Kidston | Alfred Fryer Charles Bailey | 1/9/1897 | MANCH |
| Potamogeton trichoides x crispus = P. x bennettii | GB, VC86 Stirlingshire, Grangemouth | John Stirling Stirling Robert Kidston | Alfred Fryer Charles Bailey | 24/8/1894 | MANCH |
| Potamogeton trichoides x crispus = P. x bennettii | GB, VC86 Stirlingshire, Grangemouth | John Stirling Stirling Robert Kidston | Alfred Fryer Charles Bailey | 1/9/1897 | MANCH |
| Potamogeton trichoides x crispus = P. x bennettii | GB, VC86 Stirlingshire, Grangemouth | John Stirling Stirling Robert Kidston | Alfred Fryer Charles Bailey | 1/9/1897 | MANCH |
| Potamogeton trichoides x crispus = P. x bennettii | GB, VC86 Stirlingshire, Grangemouth | John Stirling Stirling Robert Kidston | London Natural History Society | 24/8/1894 | SLBI |
| Potamogeton trichoides x crispus = P. x bennettii | GB, VC86 Stirlingshire, Grangemouth | John Stirling Stirling Robert Kidston | Allan Octavian Hume Arthur Bennett John Stirling Stirling | 24/8/1894 | SLBI |
| Potentilla palustris | GB, VC87 West Perthshire, Doune | Robert Kidston | Robert Kidston | 16/7/1884 | DBC |
+ | Potentilla palustris | GB, VC87 West Perthshire, Watston Loch | Robert Kidston | | 16/7/1884 | PTH |
+ | Ranunculus peltatus | GB, VC87 West Perthshire, Ochtertyre | Robert Kidston | | 3/7/1889 | PTH |
+ | Rhynchospora alba | GB, VC87 West Perthshire, Lake of Menteith | Robert Kidston | | 26/8/1884 | PTH |
+ | Rhynchospora alba | GB, VC87 West Perthshire, Lake of Menteith | Robert Kidston | | 26/8/1884 | PTH |
| Rhynchospora alba | GB, VC87 West Perthshire, Lake of Menteith | | Robert Kidston | 26/8/1884 | DBC |
| Sagina procumbens | GB, VC6 North Somerset, Timsbury | Robert Kidston | Robert Kidston | 6/1884 | DBC |
| Sanguisorba minor | GB, VC17 Surrey, Molesley Hurst | Robert Kidston | Robert Kidston | 23/5/1884 | DBC |
+ | Schoenoplectus lacustris | GB, VC87 West Perthshire, Lake of Menteith | Robert Kidston | Francis Buchanan White | 11/8/1890 | PTH |
| Sonchus arvensis | GB, VC17 Surrey, Box Hill | Robert Kidston | Robert Kidston | 27/8/1880 | DBC |
+ | Sparganium natans | GB, VC88 Mid Perthshire, Fendoch | Robert Kidston | | 15/9/1884 | PTH |
+ | Sparganium natans | GB, VC88 Mid Perthshire, Fendoch | Robert Kidston | | 15/9/1884 | PTH |
+ | Spiraea salicifolia | GB, VC87 West Perthshire, Blackdub | Robert Kidston | | 3/7/1889 | PTH |
| Stellaria palustris | GB, VC86 Stirlingshire, Stirling | Robert Kidston | Robert Kidston | 8/8/1884 | DBC |
+ | Stellaria palustris | GB, VC87 West Perthshire, Ochtertyre | Robert Kidston | | 3/7/1889 | PTH |
+ | Stratiotes aloides | GB, VC88 Mid Perthshire, Loch Monzievaird | Robert Kidston | | 19/9/1884 | PTH |
| Subularia aquatica | GB, VC88 Mid Perthshire, Monzievaird Loch | Robert Kidston | Robert Kidston | 13/9/1884 | DBC |
| Trifolium subterraneum | GB, VC17 Surrey, Moulsey | Robert Kidston | Robert Kidston | 23/5/1884 | DBC |
+ | Utricularia minor | GB, VC88 Mid Perthshire, Fendoch | Robert Kidston | | 15/9/1884 | PTH |
+ | Utricularia minor | GB, VC88 Mid Perthshire, Fendoch | Robert Kidston | | 15/9/1884 | PTH |
| Utricularia minor | GB, VC88 Mid Perthshire, Monzie | Robert Kidston | Robert Kidston | 15/9/1884 | DBC |
+ | Vaccinium oxycoccos | GB, VC87 West Perthshire, Lake of Menteith | Robert Kidston | | 26/8/1885 | PTH |
+ | Viola canina | GB, VC87 West Perthshire, Blackford | Robert Kidston | | 11/7/1889 | PTH |