+ | Potamogeton crispus | GB, VC88 Mid Perthshire, Kirkton | William Barclay | | 9/8/1892 | PTH |
+ | Potamogeton crispus | GB, VC88 Mid Perthshire, Kirkton | William Barclay | | 9/8/1892 | PTH |
+ | Potamogeton crispus | GB, VC88 Mid Perthshire, White Moss | William Barclay | | 19/8/1886 | PTH |
| Potamogeton gramineus | GB, VC88 Mid Perthshire, Blair Atholl,Loch Moraig | William Barclay | William Barclay | 14/8/1916 | E |
+ | Potamogeton gramineus | GB, VC89 East Perthshire, Monk Myre | William Barclay | | 29/8/1883 | PTH |
+ | Potamogeton lucens | GB, VC88 Mid Perthshire, Loch Monzievaird | William Barclay | | 10/1887 | PTH |
+ | Potamogeton lucens x perfoliatus = P. x salicifolius | GB, VC88 Mid Perthshire, Dalreoch Bridge | William Barclay | | 13/9/1915 | PTH |
| Potamogeton lucens x perfoliatus = P. x salicifolius | GB, VC88 Mid Perthshire, Forteviot Bridge | William Barclay | Watson Botanical Exchange Club Charles Bailey William Barclay | 13/9/1915 | MANCH |
+ | Potamogeton lucens x perfoliatus = P. x salicifolius | GB, VC88 Mid Perthshire, Kirkton | William Barclay | | 9/8/1892 | PTH |
+ | Potamogeton lucens x perfoliatus = P. x salicifolius | GB, VC89 East Perthshire, River Isla | William Barclay | | 7/1887 | PTH |
+ | Potamogeton natans | GB, VC88 Mid Perthshire, Dupplin Loch | William Barclay | | 25/6/1892 | PTH |
+ | Potamogeton natans | GB, VC88 Mid Perthshire, Kirkton | William Barclay | | | PTH |
+ | Potamogeton natans | GB, VC89 East Perthshire, Errol | William Barclay | | 5/1887 | PTH |
+ | Potamogeton natans | GB, VC89 East Perthshire, Pow of Errol | William Barclay | | 12/8/1892 | PTH |
| Potamogeton natans | GB, VC89 East Perthshire, Stormont Loch | William Barclay | Allan Octavian Hume William Barclay Arthur Bennett | 17/6/1893 | SLBI |
+ | Potamogeton obtusifolius | GB, VC88 Mid Perthshire, Kirkton | William Barclay | | 9/8/1892 | PTH |
+ | Potamogeton obtusifolius | GB, VC88 Mid Perthshire, Kirkton | William Barclay | | 25/8/1914 | PTH |
| Potamogeton obtusifolius | GB, VC89 East Perthshire, Marlee Loch | Charles Geekie Matthew William Barclay | Arthur Bennett | 8/1914 | MANCH |
+ | Potamogeton perfoliatus | GB, VC88 Mid Perthshire, Dalreoch Bridge | William Barclay | | 13/9/1915 | PTH |
+ | Potamogeton perfoliatus | GB, VC88 Mid Perthshire, Kirkton | William Barclay | | 8/9/1892 | PTH |
+ | Potamogeton polygonifolius | GB, VC88 Mid Perthshire, Dupplin Loch | William Barclay | | 25/6/1892 | PTH |
+ | Potamogeton polygonifolius | GB, VC89 East Perthshire, Redmyre | William Barclay | | 4/6/1892 | PTH |
+ | Potentilla anglica | GB, VC88 Mid Perthshire, Rhynd | William Barclay | | 7/1885 | PTH |
+ | Potentilla anglica | GB, VC89 East Perthshire, Ballinluig | Robert Hunt Meldrum | William Barclay | 6/1887 | PTH |
+ | Potentilla anglica | GB, VC89 East Perthshire, Caputh | William Barclay | | 7/1887 | PTH |
+ | Potentilla anglica | GB, VC89 East Perthshire, River Tay | William Barclay | | 17/7/1915 | PTH |
+ | Potentilla reptans | GB, VC88 Mid Perthshire, Perth ? | William Barclay | | 19/8/1890 | PTH |
+ | Potentilla reptans | GB, VC88 Mid Perthshire, Perth Harbour | William Barclay | | 19/8/1890 | PTH |
+ | Potentilla reptans | GB, VC89 East Perthshire, Glen Carse | William Barclay | | 6/1887 | PTH |
+ | Potentilla reptans | GB, VC89 East Perthshire, Glendoick | William Barclay | | 7/8/1906 | PTH |
+ | Puccinellia distans | GB, VC88 Mid Perthshire, Perth Harbour | William Barclay | | 22/7/1897 | PTH |
+ | Puccinellia distans | GB, VC89 East Perthshire, Powgavie | William Barclay | | 7/8/1903 | PTH |
+ | Pyrola minor | GB, VC89 East Perthshire, Kinfauns | William Barclay | | 7/1886 | PTH |
+ | Pyrola rotundifolia subsp. rotundifolia | GB, VC87 West Perthshire, Ben Lui | William Barclay | | 6/7/1889 | PTH |
+ | Ranunculus auricomus | GB, VC88 Mid Perthshire, Perth | William Barclay | | 4/1886 | PTH |
| Rosa caesia | GB, VC57 Derbyshire, Shirley | William Richardson Linton | William Barclay | 20/8/1904 to 6/9/1904 | ABS |
| Rosa caesia subsp. caesia | GB, VC88 Mid Perthshire, Callarfountain Hill | William Barclay | Allan Octavian Hume | 15/6/1896 23/8/1896 | SLBI |
| Rosa caesia subsp. caesia | GB, VC88 Mid Perthshire, Comrie | William Barclay | | 31/7/1896 | SLBI |
| Rosa caesia subsp. caesia | GB, VC88 Mid Perthshire, Craigend | William Barclay | Allan Octavian Hume William Barclay | 10/8/1894 | SLBI |
| Rosa caesia subsp. caesia | GB, VC88 Mid Perthshire, Glen Farg | William Barclay | Allan Octavian Hume William Barclay | 29/8/1894 | SLBI |