OregonFlora species comparison

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Spiranthes porrifolia

Spiranthes ovalis

western ladies tresses
Habit Herbs 25–55 cm tall.
Leaves

3–4, ellipticlanceolate; to 35 × 3 cm.

Inflorescences

dense tightly spiraled spikes, generally 3-ranked, 10–60-flowered;

rachis glabrous to sparsely pubescent.

Flowers

ascending;

sepals and petals lanceolate; creamy-yellow to yellowish, converging with lip to form a tube;

tips spreading, 7–8 × 1–2.5 mm;

lateral sepals oblique;

lip ovate to lanceolate; concave to loosely folded with a narrowed apex, 6–8 × 3–4 mm.

2n

=44.

Spiranthes porrifolia

Spiranthes ovalis
Distribution
[WildflowerSearch map]
[BONAP county map]
[WildflowerSearch map]
[BONAP county map]
Discussion

Stream banks, river banks, seeps, riparian meadows. Flowering Jun–Jul. 0–2700m. Casc, CR, Sisk, WV. CA, ID, NV, WA. Native.

The spreading perianth tips and narrow-tipped lip distinguish this species from the more common S. romanzoffiana.
Source Flora of Oregon, volume 1, page 330
James Riser
Sibling taxa
S. romanzoffiana, S. stellata
S. porrifolia, S. romanzoffiana, S. stellata
Synonyms Spiranthes romanzoffiana var. porrifolia
Web links 
Unless otherwise noted, all data comes from OregonFlora.



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