| Paphiopedilum BorodinPaph. Borodin | | Jan 1 1952 | C.Cookson |
| Paphiopedilum TriskonPaph. Triskon | | Jan 1 1952 | C.Cookson |
| Paphiopedilum Windy WeatherPaph. Windy Weather | | Jan 1 1952 | C.Cookson |
| Paphiopedilum SeahousesPaph. Seahouses | | Jan 1 1939 | C.Cookson |
| Miltoniopsis DalbyMps. Dalby | | Jan 1 1939 | C.Cookson |
| Paphiopedilum MickleyPaph. Mickley | | Jan 1 1939 | C.Cookson |
| Paphiopedilum BamburghPaph. Bamburgh | | Jan 1 1939 | C.Cookson |
| Miltoniopsis WhitleyMps. Whitley | | Jan 1 1939 | C.Cookson |
| Paphiopedilum ConsettPaph. Consett | | Jan 1 1939 | C.Cookson |
| Paphiopedilum BeaufrontPaph. Beaufront | | Jan 1 1939 | C.Cookson |
| Miltoniopsis HaltonMps. Halton | | Jan 1 1939 | C.Cookson |
| Miltoniopsis EtalMps. Etal | | Jan 1 1939 | C.Cookson |
| Miltoniopsis TynemouthMps. Tynemouth | | Jan 1 1939 | C.Cookson |
| Miltoniopsis BellisterMps. Bellister | | Jan 1 1939 | C.Cookson |
| Miltoniopsis KeilderMps. Keilder | | Jan 1 1939 | C.Cookson |
| Calanthe StagshawCal. Stagshaw | | Jan 1 1938 | C.Cookson |
| Paphiopedilum WylamPaph. Wylam | | Jan 1 1937 | C.Cookson |
| Paphiopedilum BywellPaph. Bywell | | Jan 1 1937 | C.Cookson |
| Paphiopedilum ScotswoodPaph. Scotswood | | Jan 1 1937 | C.Cookson |
| Paphiopedilum CorstopitumPaph. Corstopitum | | Jan 1 1937 | C.Cookson |
| Paphiopedilum PrudhoePaph. Prudhoe | | Jan 1 1937 | C.Cookson |
| Miltoniopsis FeatherstoneMps. Featherstone | | Jan 1 1936 | C.Cookson |
| Paphiopedilum CurrawPaph. Curraw | | Jan 1 1936 | C.Cookson |
| Paphiopedilum DukesfieldPaph. Dukesfield | | Jan 1 1936 | C.Cookson |
| Paphiopedilum TeppermoorPaph. Teppermoor | | Jan 1 1936 | C.Cookson |
| Miltoniopsis BlenkinsopMps. Blenkinsop | | Jan 1 1936 | C.Cookson |
| Paphiopedilum FenwickPaph. Fenwick | | Jan 1 1936 | C.Cookson |
| Paphiopedilum FenhamPaph. Fenham | | Jan 1 1936 | C.Cookson |
| Paphiopedilum RyallPaph. Ryall | | Jan 1 1936 | C.Cookson |
| Paphiopedilum BromleePaph. Bromlee | | Jan 1 1936 | C.Cookson |
| Paphiopedilum CincoPaph. Cinco | | Jan 1 1936 | C.Cookson |
| Paphiopedilum HarlePaph. Harle | | Jan 1 1936 | C.Cookson |
| Miltoniopsis ThirlwallMps. Thirlwall | | Jan 1 1936 | C.Cookson |
| Paphiopedilum AllendalePaph. Allendale | | Jan 1 1936 | C.Cookson |
| Paphiopedilum TipaltPaph. Tipalt | | Jan 1 1936 | C.Cookson |
| Paphiopedilum Tower TyePaph. Tower Tye | | Jan 1 1936 | C.Cookson |
| Paphiopedilum BlanchlandPaph. Blanchland | | Jan 1 1936 | C.Cookson |
| Paphiopedilum FewseyPaph. Fewsey | | Jan 1 1936 | C.Cookson |
| Paphiopedilum LipwoodPaph. Lipwood | | Jan 1 1936 | C.Cookson |
| Paphiopedilum GreenleePaph. Greenlee | | Jan 1 1936 | C.Cookson |
| Calanthe W. J. StablesCal. W. J. Stables | | Jan 1 1936 | C.Cookson |
| Miltoniopsis WarkworthMps. Warkworth | | Jan 1 1936 | C.Cookson |
| Paphiopedilum BlaydonPaph. Blaydon | | Jan 1 1936 | C.Cookson |
| Paphiopedilum HoepenickPaph. Hoepenick | | Jan 1 1935 | C.Cookson |
| Paphiopedilum AllerwashPaph. Allerwash | | Jan 1 1935 | C.Cookson |
| Miltoniopsis SwinburnMps. Swinburn | | Jan 1 1935 | C.Cookson |
| Calanthe AcombCal. Acomb | | Jan 1 1935 | C.Cookson |
| Paphiopedilum WhinshieldsPaph. Whinshields | | Jan 1 1935 | C.Cookson |
| Miltoniopsis BeaufrontMps. Beaufront | | Jan 1 1935 | C.Cookson |
| Paphiopedilum WentworthPaph. Wentworth | | Jan 1 1935 | C.Cookson |
| Miltoniopsis AlnwickMps. Alnwick | | Jan 1 1935 | C.Cookson |
| Paphiopedilum HextolPaph. Hextol | | Jan 1 1935 | C.Cookson |
| Paphiopedilum LangleyPaph. Langley | | Jan 1 1935 | C.Cookson |
| Paphiopedilum SimonburnPaph. Simonburn | | Jan 1 1935 | C.Cookson |
| Paphiopedilum SlaleyPaph. Slaley | | Jan 1 1935 | C.Cookson |
| Calanthe GrindonCal. Grindon | | Jan 1 1935 | C.Cookson |
| Paphiopedilum StawardPaph. Staward | | Jan 1 1935 | C.Cookson |
| Paphiopedilum CattonPaph. Catton | | Jan 1 1935 | C.Cookson |
| Paphiopedilum WalwickPaph. Walwick | | Jan 1 1935 | C.Cookson |
| Miltoniopsis PrudhoeMps. Prudhoe | | Jan 1 1935 | C.Cookson |
| Paphiopedilum LeazesPaph. Leazes | | Jan 1 1935 | C.Cookson |
| Paphiopedilum SunnisidePaph. Sunniside | | Jan 1 1935 | C.Cookson |
| Miltoniopsis ChipchaseMps. Chipchase | | Jan 1 1935 | C.Cookson |
| Paphiopedilum CorbridgePaph. Corbridge | | Jan 1 1935 | C.Cookson |
| Paphiopedilum NewbroughPaph. Newbrough | | Jan 1 1935 | C.Cookson |
| Paphiopedilum RytonPaph. Ryton | | Jan 1 1935 | C.Cookson |
| Paphiopedilum YarridgePaph. Yarridge | | Jan 1 1935 | C.Cookson |
| Calanthe ChestersCal. Chesters | | Jan 1 1935 | C.Cookson |
| Paphiopedilum DeepdenePaph. Deepdene | | Jan 1 1935 | C.Cookson |
| Calanthe GeraldCal. Gerald | | Jan 1 1934 | C.Cookson |
| Miltoniopsis LangleyMps. Langley | | Jan 1 1934 | C.Cookson |
| Miltoniopsis BamburghMps. Bamburgh | | Jan 1 1934 | C.Cookson |
| Miltoniopsis DilstonMps. Dilston | | Jan 1 1933 | C.Cookson |
| Calanthe BruntonCal. Brunton | | Jan 1 1933 | C.Cookson |
| Calanthe WylamCal. Wylam | | Jan 1 1933 | C.Cookson |
| Miltoniopsis HaughtonMps. Haughton | | Jan 1 1933 | C.Cookson |
| Paphiopedilum AnickPaph. Anick | | Jan 1 1933 | C.Cookson |
| Miltoniopsis BywellMps. Bywell | | Jan 1 1933 | C.Cookson |
| Paphiopedilum DilstonPaph. Dilston | | Jan 1 1933 | C.Cookson |
| Paphiopedilum GalenaPaph. Galena | | Jan 1 1933 | C.Cookson |
| Paphiopedilum SenegalPaph. Senegal | | Jan 1 1932 | C.Cookson |
| Paphiopedilum ZambesiPaph. Zambesi | | Jan 1 1932 | C.Cookson |
| Paphiopedilum HastingsPaph. Hastings | | Jan 1 1932 | C.Cookson |
| Paphiopedilum GothaPaph. Gotha | | Jan 1 1932 | C.Cookson |
| Calanthe WardenCal. Warden | | Jan 1 1932 | C.Cookson |
| Miltoniopsis BelsayMps. Belsay | | Jan 1 1932 | C.Cookson |
| Paphiopedilum HanoverPaph. Hanover | | Jan 1 1932 | C.Cookson |
| Paphiopedilum BantagnaPaph. Bantagna | | Jan 1 1932 | C.Cookson |
| Miltoniopsis AydonMps. Aydon | | Jan 1 1932 | C.Cookson |
| Paphiopedilum PavanaPaph. Pavana | | Jan 1 1932 | C.Cookson |
| Paphiopedilum CongoPaph. Congo | | Jan 1 1932 | C.Cookson |
| Paphiopedilum CharleroiPaph. Charleroi | | Jan 1 1932 | C.Cookson |
| Paphiopedilum SheridanPaph. Sheridan | | Jan 1 1932 | C.Cookson |
| Paphiopedilum NovaroPaph. Novaro | | Jan 1 1932 | C.Cookson |
| Paphiopedilum NirvettePaph. Nirvette | | Jan 1 1931 | C.Cookson |
| Paphiopedilum MontrosePaph. Montrose | | Jan 1 1931 | C.Cookson |
| Paphiopedilum AscaniaPaph. Ascania | | Jan 1 1931 | C.Cookson |
| Paphiopedilum LagunaPaph. Laguna | | Jan 1 1931 | C.Cookson |
| Paphiopedilum OakwoodensePaph. Oakwoodenseprimary | | Jan 1 1931 | C.Cookson |
| Paphiopedilum OakiraPaph. Oakira | | Jan 1 1931 | C.Cookson |
| Paphiopedilum DunbarPaph. Dunbar | | Jan 1 1931 | C.Cookson |
| Paphiopedilum NevassaPaph. Nevassa | | Jan 1 1931 | C.Cookson |
| Paphiopedilum NankinPaph. Nankin | | Jan 1 1931 | C.Cookson |
| Paphiopedilum CedricPaph. Cedric | | Jan 1 1931 | C.Cookson |
| Paphiopedilum BengalPaph. Bengal | | Jan 1 1931 | C.Cookson |
| Paphiopedilum AlocusPaph. Alocus | | Jan 1 1930 | C.Cookson |
| Calanthe Hexham LassCal. Hexham Lass | | Jan 1 1930 | C.Cookson |
| Paphiopedilum AcanthaPaph. Acantha | | Jan 1 1930 | C.Cookson |
| Paphiopedilum GraftonPaph. Grafton | | Jan 1 1930 | C.Cookson |
| Paphiopedilum Warden SnowflakePaph. Warden Snowflake | | Jan 1 1930 | C.Cookson |
| Paphiopedilum Warden PetPaph. Warden Pet | | Jan 1 1929 | C.Cookson |
| Paphiopedilum Warden PearlPaph. Warden Pearl | | Jan 1 1929 | C.Cookson |
| Paphiopedilum Warden GemPaph. Warden Gem | | Jan 1 1928 | C.Cookson |
| Paphiopedilum AcombPaph. Acomb | | Jan 1 1927 | C.Cookson |
| Paphiopedilum Warden SurprisePaph. Warden Surprise | | Jan 1 1926 | C.Cookson |
| Paphiopedilum HedleyPaph. Hedley | | Jan 1 1926 | C.Cookson |
| Paphiopedilum FloddenPaph. Flodden | | Jan 1 1926 | C.Cookson |
| Paphiopedilum HexhamPaph. Hexham | | Jan 1 1926 | C.Cookson |
| Paphiopedilum ValiantPaph. Valiant | | Jan 1 1926 | C.Cookson |
| Paphiopedilum DosPaph. Dos | | Jan 1 1926 | C.Cookson |
| Paphiopedilum KelsoPaph. Kelso | | Jan 1 1926 | C.Cookson |
| Paphiopedilum UnoPaph. Uno | | Jan 1 1925 | C.Cookson |
| Paphiopedilum StarlightPaph. Starlight | | Jan 1 1925 | C.Cookson |
| Oncidium ArgusOnc. Argus | | Jan 1 1925 | C.Cookson |
| Calanthe Hexham PetCal. Hexham Pet | | Jan 1 1925 | C.Cookson |
| Paphiopedilum OpalPaph. Opal | | Jan 1 1925 | C.Cookson |
| Calanthe Hexham GemCal. Hexham Gem | | Jan 1 1925 | C.Cookson |
| Calanthe Hexham LadCal. Hexham Lad | | Jan 1 1925 | C.Cookson |
| Oncidium Oberon (1925)Onc. Oberon (1925) | | Jan 1 1925 | C.Cookson |
| Oncidium WardenOnc. Warden | | Jan 1 1924 | C.Cookson |
| Paphiopedilum White StarPaph. White Star | | Jan 1 1924 | C.Cookson |
| Oncidium LuganoOnc. Lugano | | Jul 1 1922 | C.Cookson |
| Paphiopedilum GriquaPaph. Griqua | | Jan 1 1922 | C.Cookson |
| Paphiopedilum IdahoPaph. Idaho | | Jan 1 1922 | C.Cookson |
| Paphiopedilum BlanchettePaph. Blanchette | | Jan 1 1922 | C.Cookson |
| Paphiopedilum CarinaPaph. Carina | | Jan 1 1922 | C.Cookson |
| Paphiopedilum VirgoPaph. Virgo | | Jan 1 1921 | C.Cookson |
| Paphiopedilum EmeraldPaph. Emerald | | Nov 1 1920 | C.Cookson |
| Paphiopedilum DouglasPaph. Douglas | | Jan 1 1920 | C.Cookson |
| Paphiopedilum CircePaph. Circe | | Jan 1 1920 | C.Cookson |
| Paphiopedilum MoonstonePaph. Moonstone | | Jan 1 1920 | C.Cookson |
| Paphiopedilum WardenPaph. Warden | | Jan 1 1920 | C.Cookson |