Hypericum majus (A.Gray) Britton

Large st. johnswort (en), Grand Millepertuis (fr), Millepertuis élevé (fr), Grand millepertuis (fr)

Species

Angiosperms > Malpighiales > Hypericaceae > Hypericum

Characteristics

Much like no. 25 [Hypericum canadense L.], but more distinctly perennial from a rhizome, and avg taller and with more compact infl; lvs commonly ascending, mostly lanceolate to narrowly oblong or narrowly elliptic, 2–4 cm × 3–9 mm, 5–7-nerved, broadly obtuse or rounded at the weakly clasping base, the basal margins of a pair of lvs meeting around the stem; sep lanceolate, acute, 4.5–6.5 mm; pet 3.5–4 mm; stamens 14–21; styles 3(4), to 1 mm; fr maroon, ellipsoid-conic, 5–7 mm; seeds 0.5–0.7 mm; 2n=16. Wet meadows and shores; Nf. and Que. to B.C., s. to N.J., O., Ill., Kans., and Colo. July–Sept. Depauperate plants may approach no. 25.
Life form annual
Growth form herb
Growth support -
Foliage retention deciduous
Sexuality hermaphrodite
Pollination entomogamy
Spread barochory
Mature width (meter) -
Mature height (meter) -
Root system rhizome
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months -
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway c3

Environment

Light -
Soil humidity -
Soil texture -
Soil acidity -
Soil nutriment -
Hardiness (USDA) 4-9

Usage

Uses -
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) 30 - 90
Germination temperacture (C°) 10 - 12
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Flower

Hypericum majus flower picture by Diane Okrongly (cc-by-sa)

Distribution

Hypericum majus world distribution map, present in Bosnia and Herzegovina, Belarus, Canada, Germany, France, Japan, and United States of America

Conservation status

Hypericum majus threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:126275-2
WFO ID wfo-0000727936
COL ID 6MQF6
BDTFX ID 35328
INPN ID 103299
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Sarothra major Hypericum majus Hypericum canadense var. majus Hypericum mutilum var. longifolium