Platanthera clavellata L. - Club-spur orchid


 

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Platanthera clavellata - (image 1 of 4)

 

Taxonomy

Family: Orchidaceae

Habitat

Bogs, mesophytic swamps. Moist, peaty, sandy prairies.

Associates

On swale borders near Lake Michigan with Comandra umbellata, Pycnanthemum virginianaum, Sceleria triglomerata, Solidago graminifolia nuttallii, Tradescantia ohiensis, Zizia aurea.

Distribution

Eastern half of US.

Morphology

Herbaceous perennial monocot. Cauline leaf solitary or with a few reduced leaves above, lanceolate to lance-ovate or ovate. Flowers greenish-white; lip entire, not fringed; spur long, club-shaped.

Notes

Flowers early July to late August

Wetland indicator: Obligate

Also known as Green Wood Orchid, this little orchid is difficult to find in bloom when it is often obscured by the surrounding vegetation.

References

Swink, F. and G. Wilhelm. 1994. Plants of the Chicago Region.
Indiana Academy of Science. The Morton Arboretum. Lisle, Illinois.

 


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 Michael Hough 2005