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Orchidaceae
Platanthera

not marked as a favorite taxon Platanthera grandiflora (Bigelow) Lindley. Common name: Large Purple Fringed Orchid, Plume-royal. Phenology: Jun-early Jul. Habitat: Bogs, seepages, moist places at high elevations. Distribution: NL (Newfoundland) and ON south to NJ, OH, and MI, and south in the mountains to w. NC and ne. GA

Glossary (beta!)

Subgenus: Fimbriella.

ID notes: Blooming 3-4 weeks earlier than either P. psycodes and P. shriveri when they grow in proximity.

Origin/Endemic status: Native

Taxonomy Comments: If Orchis fimbriata Aiton is conspecific, the correct name is P. fimbriata (Aiton) Lindley.

Synonymy ⓘ: = AqW, Can, Il, K4, NE, NS, NY, POWO, Tn, Va; = Habenaria grandiflora (Bigelow) Torr.; = Platanthera fimbriata (Aiton) Lindl.; < Blephariglottis grandiflora (Bigelow) Rydb. — S, S13; < Fimbriella psycodes (L.) Butzin var. grandiflora (Bigelow) Butzin — Butzin (1981); < Habenaria fimbriata (Aiton) R.Br. — F, Tat, WV; < Habenaria psycodes (L.) Spreng. var. grandiflora (Bigelow) A.Gray — C, G, RAB, Correll (1950); < Platanthera grandiflora (Bigelow) Lindl. — FNA26, Pa, W, Efimov (2016), Luer (1975). Basionym: Orchis grandiflora Bigelow 1824

Links to other floras: < Platanthera grandiflora - FNA26

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Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: FACW
  • Eastern Mountains and Piedmont: FACW (taxonomic split from wetland indicator species)
  • Midwest: FACW (taxonomic split from wetland indicator species)
  • Northcentral & Northeast: FACW (taxonomic split from wetland indicator species)

Heliophily ⓘ: 6

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image #1 of Platanthera grandiflora© Gary P. Fleming | Original Image ⭷
image #2 of Platanthera grandiflora© Alan Cressler: Platanthera grandiflora, Great Craggy Mountain, Blue Ridge Parkway, Buncombe County, North Carolina 3 by Alan Cressler source
image #3 of Platanthera grandiflora© Jim Fowler | Original Image ⭷
image #4 of Platanthera grandiflora© Alan Cressler: Platanthera grandiflora, Chattahoochee National Forest, Gilmer County, Georgia 1 by Alan Cressler source | Original Image ⭷
image #6 of Platanthera grandiflora© Will Stuart | Original Image ⭷
image #8 of Platanthera grandiflora© Alan Cressler CC-BY-NC, permission granted to NCBG | Original Image ⭷

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Horticultural Information

NCBG trait

Intro: Erect perennial found in bogs, seepages and other moist places at high elevations.

Stems: Stem somewhat fleshy, unbranched, smooth.

Leaves: Leaves alternate, lance-shaped to oval, 3-10 in. long (reduced upward), with parallel veins and a central crease (keeled), smooth.

Inforescence:

Flowers: Flowers 30-60 in a dense, cylindric terminal raceme; purple; 3/4-1 in. long; bilaterally symmetric; consisting of 2 petals and a sepal forming a flattish hood, 2 wing-like lateral sepals, a 3-lobed lip-petal (each lobe fan-like and prominently fringed) and a long, club-shaped spur.

Fruits: Fruit an ellipsoid capsule.

Comments:

Height: 1-4 ft.

plant sale text:

bloom table text:

description: Erect perennial found in bogs, seepages and other moist places at high elevations.

stems: Stem somewhat fleshy, unbranched, smooth.

leaves: Leaves alternate, lance-shaped to oval, 3-10 in. long (reduced upward), with parallel veins and a central crease (keeled), smooth.

inflorescence:

flowers: Flowers 30-60 in a dense, cylindric terminal raceme; purple; 3/4-1 in. long; bilaterally symmetric; consisting of 2 petals and a sepal forming a flattish hood, 2 wing-like lateral sepals, a 3-lobed lip-petal (each lobe fan-like and prominently fringed) and a long, club-shaped spur.

fruits: Fruit an ellipsoid capsule.

comments:

cultural notes:

germination code:

native range:



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