Cypripedium parviflorum var. pubescens

(Willdenow) O. W. Knight

Rhodora 8: 93. 1906.

Common names: Cypripède pubescent
IllustratedEndemic
Basionym: Cypripedium pubescens Willdenow Hort. Berol. 1: plate 13. 1804 Cypripedium veganum P. Barker & M. Barker
Synonyms: Cypripedium calceolus var. planipetalum (Fernald) Victorin & J. Rousseau Cypripedium calceolus var. pubescens (Willdenow) Correll Cypripedium flavescens Cockerell Cypripedium parviflorum var. planipetalum Fernald
Treatment appears in FNA Volume 26. Treatment on page 506. Mentioned on page 502, 504, 505, 507.

Bracts: abaxial surface of distalmost sheathing bract (and often the next) densely and conspicuously silvery-pubescent when young (later sometimes glabrescent). Leaves 3–5, on proximal portion of or more evenly spaced along stem, alternate, erect to spreading; blade orbiculate or broadly ovate to elliptic-lanceolate or oblanceolate, 7.9–20.9 × 1.5–12 cm. Flowers 1–2, large to rather small (very small in some boreal and northern cordilleran specimens), scent moderate to faint, rose or musty; sepals commonly spotted, striped, and reticulately marked with reddish-brown or madder, rarely extensively blotched or wholly unmarked; lip oblance-ovoid to calceolate or subglobose, 20–54 mm; orifice 10–23 (–27) mm. 2n = 20.


Phenology: Flowering Apr–Aug.
Habitat: Mesic deciduous and coniferous forest, openings, thickets, prairies, meadows, fens
Elevation: 0–2900 m

Distribution

V26 1031-distribution-map.jpg

Alta., B.C., Man., N.B., Nfld. and Labr., N.W.T., N.S., Ont., Que., Sask., Ariz., Colo., Conn., D.C., Ga., Ill., Ind., Iowa, Kans., Ky., Maine, Md., Mass., Mich., Minn., Miss., Mo., Mont., N.H., N.J., N.Mex., N.Y., N.C., Ohio, Oreg., Pa., R.I., Tenn., Utah, Vt., Va., Wash., W.Va., Wis.

Discussion

Selected References

None.

Lower Taxa

None.
silvery-pubescent +
self-pollination +
Charles J. Sheviak +
(Willdenow) O. W. Knight +
Cypripedium pubescens +  and Cypripedium veganum +
indehiscent +
not +  and articulate +
conduplicate +  and plicate +
7.9 cm79 mm <br />0.079 m <br /> (20.9 cm209 mm <br />0.209 m <br />) +
broadly ovate +  and elliptic-lanceolate or oblanceolate +
1.5 cm15 mm <br />0.015 m <br /> (12 cm120 mm <br />0.12 m <br />) +
Cypripède pubescent +
Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. +, N.W.T. +, N.S. +, Ont. +, Que. +, Sask. +, Ariz. +, Colo. +, Conn. +, D.C. +, Ga. +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, Maine +, Md. +, Mass. +, Mich. +, Minn. +, Miss. +, Mo. +, Mont. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, N.C. +, Ohio +, Oreg. +, Pa. +, R.I. +, Tenn. +, Utah +, Vt. +, Va. +, Wash. +, W.Va. +  and Wis. +
1.9 cm19 mm <br />0.019 m <br /> (8 cm80 mm <br />0.08 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (4 cm40 mm <br />0.04 m <br />) +
0–2900 m +
3-merous +, sessile +  and pedicellate +
musty +  and rose +
moderate +
small +  and large to rather +
ellipsoid;oblong-ellipsoid +
Mesic deciduous and coniferous forest, openings, thickets, prairies, meadows, fens +
lateral +  and terminal +
petiolate +, sessile +  and simple +
erect;spreading +
cauline +  and basal +
3 (?) +  and 5 (?) +
reduced +
white +, pale +  and deep yellow +
oblance-ovoid +  and calceolate or subglobose +
larger +
2 cm20 mm <br />0.02 m <br /> (5.4 cm54 mm <br />0.054 m <br />) +
differing in form and color +
2.3 cm23 mm <br />0.023 m <br /> (2.7 cm27 mm <br />0.027 m <br />) +
1 cm10 mm <br />0.01 m <br /> (2.3 cm23 mm <br />0.023 m <br />) +
1-many-flowered +  and cymose +
pendent +  and erect +
24mm;97mm +
horizontal +  and strongly descending +
oblong;lanceovate;undulate +
0.3 cm3 mm <br />0.003 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Flowering Apr–Aug. +
short;elongate +
aerial +  and subterranean +
slender +
minute +
unmarked +, blotched +, madder +, reddish-brown +, striped +  and spotted +
distinct +
foliaceous +
not +  and alike +
Illustrated +  and Endemic +
ovoid-oblong +, lanceovoid +, deltoid +  and cordiform-ovoid +
scapose +  and leafy +
pendent +  and erect +
proliferous +
thickened +  and stout +
2-3-lobed +
reddish spots +
Cypripedium calceolus var. planipetalum +, Cypripedium calceolus var. pubescens +, Cypripedium flavescens +  and Cypripedium parviflorum var. planipetalum +
1.1 cm11 mm <br />0.011 m <br /> (8 cm80 mm <br />0.08 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (3.4 cm34 mm <br />0.034 m <br />) +
Cypripedium parviflorum var. pubescens +
Cypripedium parviflorum +
variety +
aquatic +, lithophytic +, terrestrial +  and epiphytic +
saprophytic +, photosynthetic +  and mycotrophic +