Compilation
Platanthera dilatata

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Name

Identification
Habenaria dilatata (Pursh) Hook. [family ORCHIDACEAE ] Platanthera dilatata (Pursh) Lindl. ex L.C.Beck [family ORCHIDACEAE ] (stored under name); Platanthera hyperborea (Pursh) Kraenzl. [family ORCHIDACEAE ]
Related name
  • Habenaria borealis
  • Piperia dilatata
  • Habenaria dilatata
  • Platanthera dilatata
  • Platanthera cylindrica
  • Orchis sp.
  • Platanthera hyperborea

Flora

Entry for Platanthera dilatata (Pursh) Lindley ex L. C. Beck [family ORCHIDACEAE]
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 26,
Names
Platanthera dilatata (Pursh) Lindley ex L. C. Beck [family ORCHIDACEAE], Bot. North. Middle States, 347. 1833
Orchis dilatata Pursh [family ORCHIDACEAE], Fl. Amer. Sept., 2: 588. 1814
Habenaria dilatata (Pursh) Hooker [family ]
Limnorchis dilatata (Pursh) Rydberg [family ORCHIDACEAE]
Treatment Author(s)
Charles J. Sheviak
Information
Plants 11–130 cm or more. Leaves few–several, ascending to recurved-spreading, scattered along stem, gradually reduced to bracts distally; blade linear, linear-lanceolate, oblong, or oblanceolate, 3.5–32 × 0.3–7 cm. Spikes very lax to very dense. Flowers resupinate, rather showy, conspicuous, white; lateral sepals spreading to reflexed; petals ovate- to linear-lance-falcate, margins entire; lip descending or apex adhering to dorsal sepal and petal apices, linear-lanceolate to lanceolate, without basal thickening, 4–11 × 2–5 mm, base slightly rounded-dilated to orbiculate, rarely rhombic, margins entire; rostellum lobes parallel to slightly divergent, directed downward, very small, obscure, rounded; pollinaria straight; pollinia remaining enclosed in anther sacs; ovary rather slender to stout, 5–15 mm. 2n = 42.
Discussion
Varieties 3 (3 in the flora): North America.

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