Platanthera hookeri (Hooker's orchid)

Plate 1 figs. a–h · 8 separate observations

Platanthera hookeri, photographed by Reuven Martin — fig. a Reuven Martin, CC0 1.0 / 2020-05-31 / obs. 76234963

Platanthera hookeri, photographed by Todd Boland — fig. b Todd Boland, CC BY 4.0 / obs. 43886718

Platanthera hookeri, photographed by Ian Manning — fig. c Ian Manning, CC BY 4.0 / obs. 27921364

Platanthera hookeri, photographed by Rose Zappa — fig. d Rose Zappa, CC BY 4.0 / obs. 10085221

Platanthera hookeri, photographed by agbelliveau — fig. e agbelliveau, CC0 1.0 / obs. 204507859

Platanthera hookeri, photographed by Brandon Corder — fig. f Brandon Corder, CC BY 4.0 / obs. 146784291

Platanthera hookeri, photographed by er-birds — fig. g er-birds, CC BY 4.0 / obs. 143845778

Platanthera hookeri, photographed by Mike Zifkin — fig. h Mike Zifkin, CC BY 4.0 / obs. 46118305

Every figure is a research-grade observation under CC0, CC BY or CC BY-SA, rehosted with the photographer’s name, the licence and the observation it came from. Photographs under a NonCommercial licence are excluded from this site and are never stored, which costs us a great many pictures and is not negotiable.

Where it actually grows measured, from 455 observations

Condition	5th percentile	Median	95th percentile
Coldest month, mean daily low	-19.1 °C	-14.1 °C	-9.1 °C
Warmest month, mean daily high	19.3 °C	23.0 °C	25.5 °C
Annual rainfall	704 mm	930 mm	1,347 mm
Rainfall in the driest quarter	62 mm	171 mm	285 mm

It is found where winters are severely cold. This is not care advice and it is not a forecast. It is a measurement: we sampled the climate at every one of the 455 research-grade observations of Platanthera hookeri that carry a coordinate, and this is the range those places actually span. The 5th and 95th percentiles are used rather than the minimum and maximum, because a single cultivated specimen in a heated conservatory should not widen a tropical plant's range to the Arctic.

This is not a hardiness zone. A USDA zone is the average annual extreme minimum temperature. The figure above is the mean daily minimum of the coldest month, which is a different quantity and is typically far warmer. Reading one as the other would place a plant several zones too warm, so we do not publish a hardiness zone, because we do not have one.

Also published as 4 synonyms

A synonym is not an error. It is a record of botanists disagreeing, in print, about where this plant belongs. Each of these was somebody’s considered answer.

Habenaria hookeri Torr. ex A.Gray
Habenaria hookeri var. oblongifolia (Paine) A.Gray
Habenaria oblongifolia G.G.Niles
Lysias hookeri (Torr. ex A.Gray) Rydb.

Sourcesevery claim on this page

World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.
Wikidata. common name (P1843), joined on the World Flora Online identifier (P7715). CC0. Retrieved 2026-07-13.

We publish what we can source and we say so when we cannot. This page has no care advice and no toxicity claim, because we do not yet have those from a source we can cite. It has no native range either: Kew's checklist does not cover this taxon.