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Published In: The Native Orchids of Florida 148. 1972. (Native Orchids Florida) Name publication detail
 

Project Name Data (Last Modified On 7/9/2009)
Acceptance : Accepted
Project Data     (Last Modified On 7/9/2009)
Status: Native

 

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2. Platanthera clavellata (Michx.) Luer (green wood orchid)

Pl. 115 d, e; Map 473

Habenaria clavellata (Michx.) Spreng.

Flowering stems 10–45 cm long, the flowers 3–15 in a usually dense raceme. Main stem leaves 1 or 2 (3), the lowest much larger than the upper one(s). Sepals 4–6 mm long, pale green to pale yellow. Lateral petals 4–5 mm long, ovate to obovate, the tips pointed, greenish white to pale yellow. Lip 4–6 mm long, oblong, the tip truncate, the margins somewhat irregular, unlobed but usually with 3 well‑defined, shallow teeth at the tip, rarely nearly entire, greenish white to light yellow. Spur 7–12 mm long, strongly curved, club‑shaped at the tip. Column 1 mm long, yellowish green, the viscidia 0.5 mm apart. 2n=42. July–August.

Uncommon in southeastern Missouri, in the Ozarks and Crowley’s Ridge (eastern U.S. west to Minnesota and Texas, Canada). Acid seeps and moist, acidic soils along margins of sinkhole ponds.

The flowers of P. clavellata are unusual in that they are usually rotated at a 45‑degree angle from the vertical axis, rather than being totally resupinate. They also are apparently self‑pollinated throughout much of the species’ range, by a process in which the pollen masses crumble and fall onto the stigmatic surfaces.

 


 

 
 
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