Cypripedium arietinum

R. Brown

in W. Aiton and W. T. Aiton, Hortus Kew. 5: 222. 1813.

Common names: Ram’s-head
Endemic
Treatment appears in FNA Volume 26. Treatment on page 501. Mentioned on page 499.
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Plants erect, 10–35 cm. Leaves 3–4, along middle portion of stem, spiraled to alternate, ascending to spreading; blade narrowly elliptic to ovate-lanceolate or oblong, 5–11 × 1.3–3.5 cm. Flowers usually solitary (rarely 2 in forma biflorum P. M. Brown); sepals green with reddish brown markings; dorsal sepal broadly elliptic to ovate-lanceolate, 15–25 × 5–10 mm; lateral sepals distinct, 12–20 × 1.5–4 mm; petals somewhat spreading, same color as sepals, somewhat spirally twisted, linear- to linear-lanceolate, 11–24 × 1–2 mm; lip white with green apex, usually with extensive reddish reticulations often merging toward apex, adaxially swollen near middle, 10–16 mm, apex abruptly deflected downward, orifice basal, 7–12 mm; staminode suborbicular. 2n = 20.


Phenology: Flowering May–Jun.
Habitat: Dry to moist open coniferous and mixed forests, coniferous-forested fens, beach thickets
Elevation: mostly 0–400 m

Distribution

V26 1019-distribution-map.jpg

Man., N.S., Ont., Que., Sask., Conn., Maine, Mass., Mich., Minn., N.H., N.Y., Vt., Wis.

Discussion

Selected References

None.

Lower Taxa

None.
... more about "Cypripedium arietinum"
Charles J. Sheviak +
R. Brown +
Ram’s-head +
Man. +, N.S. +, Ont. +, Que. +, Sask. +, Conn. +, Maine +, Mass. +, Mich. +, Minn. +, N.H. +, N.Y. +, Vt. +  and Wis. +
mostly 0–400 m +
Dry to moist open coniferous and mixed forests, coniferous-forested fens, beach thickets +
Flowering May–Jun. +
in W. Aiton and W. T. Aiton, Hortus Kew. +
Cypripedium arietinum +
Cypripedium +
species +