Hypericum perforatum

Linnaeus

Sp. Pl. 2: 785. 1753.

Common names: Common St. John’s wort millepertuis commun
IntroducedWeedy
Treatment appears in FNA Volume 6. Treatment on page 99. Mentioned on page 72, 98.

Distribution

V6 174-distribution-map.jpg

B.C., Man., N.B., N.S., Nfld. and Labr. (Nfld.), Ont., P.E.I., Que., Ark., Calif., Colo., Conn., D.C., Del., Idaho, Ill., Ind., Iowa, Kans., Ky., Maine, Mass., Md., Mich., Minn., Mo., Mont., N.C., N.Dak., N.H., N.J., N.Mex., N.Y., Nebr., Nev., Ohio, Okla., Oreg., Pa., R.I., S.C., S.Dak., Tenn., Tex., Va., Vt., W.Va., Wash., Wis., Wyo., Europe, Asia (sw Arabia), Asia (China), Asia (India), Asia (Mongolia), Asia (Siberia), n Africa, also widely elsewhere

Discussion

Subspecies 4 (1 in the flora).

Hypericum perforatum has been introduced into various parts of the world, including North America, where only subsp. perforatum is represented. The range of variation in the flora area is less than occurs in Europe, and signs of hybridization that are common there are absent in North America.

Selected References

None.

... more about "Hypericum perforatum"
reddish +  and black +
yellow;orange +
oblong;ellipsoid +
Norman K. B. Robson +
Linnaeus +
striate +  and smooth +
punctiform +
distinct +
Common St. John’s wort +  and millepertuis commun +
B.C. +, Man. +, N.B. +, N.S. +, Nfld. and Labr. (Nfld.) +, Ont. +, P.E.I. +, Que. +, Ark. +, Calif. +, Colo. +, Conn. +, D.C. +, Del. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, Ky. +, Maine +, Mass. +, Md. +, Mich. +, Minn. +, Mo. +, Mont. +, N.C. +, N.Dak. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, Nebr. +, Nev. +, Ohio +, Okla. +, Oreg. +, Pa. +, R.I. +, S.C. +, S.Dak. +, Tenn. +, Tex. +, Va. +, Vt. +, W.Va. +, Wash. +, Wis. +, Wyo. +, Europe +, Asia (sw Arabia) +, Asia (China) +, Asia (India) +, Asia (Mongolia) +, Asia (Siberia) +, n Africa +  and also widely elsewhere +
connate +  and distinct +
0.6 cm6 mm <br />0.006 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
2+-flowered +  and cymose +
axillary +  and terminal +
winged +, 6-lined +, 4-lined +  and 2-lined +
terete +  and angled +
glanduliferous +, petiolate +, pseudopetiolate +, subsessile +, sessile +, estipulate +  and simple +
deciduous +  and persistent +
glandular-ciliate +
3(-4)-merous +
axile +  and parietal +
glanduliferous +
contorted +  and imbricate +
red-tinged +, yellow +  and orange +
persistent +
distinct +
carinate +
persistent +
connate +  and distinct +
Introduced +  and Weedy +
persistent +
connate +  and distinct +
elongate +
Hypericum sect. Concinna +  and Hypericum sect. Graveolentia +
Hypericum perforatum +
Hypericum sect. Hypericum +
species +
scalariform +
reticulate +  and foveolate +
south +, west +  and north +
hairy +  and glabrous +
6 +, 9 +  and 7 +