| Arbutus alpina | GB, VC97 West Inverness-shire, Glen Spean | Edward Charles Wallace Robert MacKechnie | Botanical Society & Exchange Club of The British Isles | 13/7/1936 | SLBI |
| Luzula arcuata | GB, VC97 West Inverness-shire, Aonach Beag | Edward Charles Wallace Robert MacKechnie | Botanical Society & Exchange Club of The British Isles | 15/7/1936 | SLBI |
| Epilobium alsinifolium | GB, VC92 South Aberdeenshire, Loch Callater | Robert MacKechnie | London Botanical Exchange Club Edward Charles Wallace Harold Stuart Thompson | 11/7/1933 | BIRM |
| Mentha spicata x suaveolens = M. x villosa | GB, VC76 Renfrewshire, Loganswell | Robert MacKechnie | Reading University Job Edward Lousley | 5/9/1936 | K |
| Mentha suaveolens x longifolia = M. x rotundifolia var. webberi | GB, VC99 Dunbartonshire, Arrochar | Edward Charles Wallace Robert MacKechnie | Reading University Job Edward Lousley | 8/5/1938 8/8/1938 | K |
| Mentha suaveolens x longifolia = M. x rotundifolia var. webberi | GB, VC100 Clyde Islands, Lamlash | Robert MacKechnie | Reading University Edward Charles Wallace Job Edward Lousley | 16/8/1934 | K |
| Carex capillaris | GB, VC98 Argyllshire, Ballachulish | Robert MacKechnie | Royal Botanic Gardens, Kew Job Edward Lousley | 4/8/1949 | E |
| Potamogeton obtusifolius | GB, VC77 Lanarkshire, Hogganfield Loch | George Taylor Robert MacKechnie | The British Museum | 9/9/1945 | SLBI |
| Potamogeton obtusifolius | GB, VC77 Lanarkshire, Steps | George Taylor Robert MacKechnie | The British Museum | 9/9/1945 | SLBI |
| Rumex acetosa | GB, VC92 South Aberdeenshire, Lochnagar | Robert MacKechnie | Watson Botanical Exchange Club | 16/7/1933 | SLBI |
| Tripleurospermum inodorum | GB, VC100 Clyde Islands, Lamlash | Robert MacKechnie | Watson Botanical Exchange Club Edward Charles Wallace | 14/8/1928 | SLBI |
| Cardamine pratensis | GB, VC76 Renfrewshire, Eaglesham | Robert MacKechnie | | 7/6/1938 | SLBI |
| Melampyrum pratense | GB, VC92 South Aberdeenshire, Loch Vrotachan | Edward Charles Wallace Robert MacKechnie | | 14/7/1939 | SLBI |
| Odontites vernus subsp. litoralis | GB, VC100 Clyde Islands, Brodick | Robert MacKechnie | | 13/8/1936 | SLBI |
| Persicaria lapathifolia | GB, VC100 Clyde Islands, Clauchlands Point | Robert MacKechnie | Edward Charles Wallace Job Edward Lousley | 5/8/1930 | SLBI |
| Veronica anagallis-aquatica | GB, VC100 Clyde Islands, Great Cumbrae, Bute | Robert MacKechnie | | 29/8/1936 | SLBI |
| Carex canescens | GB, VC92 South Aberdeenshire, Lochnagar | Robert MacKechnie | | 14/7/1935 | E |
| Carex canescens | GB, VC92 South Aberdeenshire, Lochnagar | Robert MacKechnie | Robert MacKechnie | 16/7/1933 | E |
| Carex otrubae | GB, VC13 West Sussex, Amberley Wild Brooks | Patrick Martin Hall | Patrick Martin Hall Robert MacKechnie | 28/6/1939 | E |
| Carex x helvola | GB, VC92 South Aberdeenshire, Lochan nan Eun | Edward Charles Wallace Robert MacKechnie | Botanical Exchange Club of The British Isles Edward Charles Wallace | 8/7/1934 | BM |
| Hydrilla verticillata | GB, VC69 Westmorland, Esthwaite Water | Edward Charles Wallace | Robert MacKechnie | 5/10/1941 | E |
| Hydrilla verticillata | IE, VCH16 West Galway, Renvyle | Basil Walston Ribbons Robert MacKechnie | Robert MacKechnie | 25/7/1953 | E |
| Potamogeton gramineus | GB, VC89 East Perthshire, Marlee Loch | Patrick Martin Hall | Patrick Martin Hall Robert MacKechnie | 15/7/1938 | E |
| Potamogeton gramineus | GB, VC88 Mid Perthshire, Lochan an Daim | Patrick Martin Hall | Patrick Martin Hall Robert MacKechnie | 20/7/1938 | E |
| Carex muricata | GB, VC88 Mid Perthshire, Ballinluig | Edward Charles Wallace Robert MacKechnie | Robert MacKechnie | 3/7/1937 | E |
| Carex muricata | GB, VC88 Mid Perthshire, Muthill | Robert MacKechnie | Robert MacKechnie | 13/7/1927 | E |
| Carex spicata | GB, VC76 Renfrewshire, Clarkston | Robert MacKechnie | Patrick Martin Hall | 19/7/1937 | BM |
| Carex spicata | GB, VC100 Clyde Islands, Bennan Head | Robert MacKechnie | | 5/8/1927 | E |
| Carex spicata | GB, VC100 Clyde Islands, Bennan Head | Robert MacKechnie | Robert MacKechnie | 21/6/1968 | E |
| Carex spicata | GB, VC75 Ayrshire, Dalry | Robert MacKechnie | Robert MacKechnie | 10/8/1968 | E |
| Carex spicata | GB, VC75 Ayrshire, Kilwinning | Robert MacKechnie | | 9/8/1969 | E |
| Carex spicata | GB, VC75 Ayrshire, Dalry | B Simpson | Robert MacKechnie | 1977 | E |
| Viola tricolor subsp. saxatilis | GB, VC86 Stirlingshire, Buchlyvie | Robert MacKechnie | Edward Charles Wallace Job Edward Lousley | 7/6/1930 | SLBI |
| Mentha piperita var. piperita | GB, VC76 Renfrewshire, Clarkston | Robert MacKechnie | Edward Charles Wallace J Fraser | 17/9/1929 | K |
| Mentha suaveolens x longifolia = M. x rotundifolia var. webberi | GB, VC76 Renfrewshire, Bennan Loch Reservoir | Robert MacKechnie | Edward Charles Wallace J Fraser | 14/9/1930 | K |
| Mentha suaveolens x longifolia = M. x rotundifolia var. webberi | GB, VC99 Dunbartonshire, Arrochar | Edward Charles Wallace Robert MacKechnie | | 8/8/1938 | K |
| Potamogeton coloratus x gramineus = P. x billupsii | GB, VC110 Outer Hebrides, Loch na Liana Mòire | John William Heslop Harrison | John William Heslop Harrison Robert MacKechnie | 23/8/1946 | E |
| Potamogeton natans x gramineus = P. x sparganiifolius | GB, VC110 Outer Hebrides, Loch na Liana Mòire | John William Heslop Harrison | Robert MacKechnie | 23/8/1946 | E |
| Carex aquatilis | GB, VC76 Renfrewshire, Harelaw Dam | Robert MacKechnie | Robert MacKechnie | 2/8/1945 | SLBI |
| Carex panicea | GB, VC61 South-east Yorkshire, Roos | Robert Lewis | Botanical Exchange Club of The British Isles Robert Lewis Robert MacKechnie | 8/6/1947 | E |