Hypericum denticulatum Walter

Coppery st. johnswort (en)

Species

Angiosperms > Malpighiales > Hypericaceae > Hypericum

Characteristics

Glabrous perennial herb 2–7 dm; cymes small and few-fld to large and much-branched; bracts lanceolate or subulate; cal erect and somewhat accrescent; pet 5–10 mm; coppery-yellow, persistent and inflexed around the fr; stamens mostly 50–80, somewhat connate at the base, but not fascicled; fr ovoid, 3–5 mm, unilocular; styles 3, distinct, persistent, 2–4 mm; 2n=24, 48. Wet woods, bogs, and marshes. July–Sept. Var. denticulatum, occurring chiefly on the coastal plain from N.J. to Ga. has elliptic to subrotund lvs 8–20 mm, one-third to two-thirds as wide, typically appressed and shorter than the internodes; the stem is usually simple and virgate, with a small, few-fld cyme, and the sep are oblanceolate to obovate, varying to sometimes lanceolate or ovate. Var. acutifolium (Elliott) S. F. Blake, is more inland (in our range), occurring from Md., W.Va., s. O., s. Ind., and s. Ill., s. to La. and n. Fla.; it has narrower lvs commonly 2–3(–4) cm and a fifth to a third as wide, typically ascending or spreading, and seldom shorter than the internodes; the stem is usually more branched above, with an open, many-fld cyme, and the sep are lanceolate to narrowly ovate. (H. acutifolium; H. virgatum)
More
Herbs perennial, erect, branching at <usually aerenchymatous> base and in inflorescence, 2–7 dm. Stems: internodes 4-lined. Leaves (main stem) spreading to appressed, sessile; blade usually broadly to narrowly ovate, rarely elliptic or lanceolate, 4–20 × 5–15(–18) mm, <mostly shorter than internodes>, leathery, margins plane, apex acute to subrounded, <densely gland-dotted>, basal veins 1–5, if 1, midrib with 2–3 pairs of branches. Inflorescences broadly pyramidal to corymbiform, to 25-flowered, branching mostly dichasial. Flowers 5–13 mm diam.; sepals ovate or lanceolate to elliptic or obovate, subequal, 3–8 × 1.5–4 mm, <margins sometimes ciliate, not setulose-ciliate>, apex acute; petals orange-yellow, obovate, 5–10 mm; stamens 50–80, irregularly grouped; styles 2–4 mm; stigmas clavate. Capsules ovoid to rostrate-subglobose, 3–5 × 2–3 mm. Seeds 0.4–0.7 mm; testa obscurely linear-reticulate to finely ribbed-scalariform.
Life form perennial
Growth form herb
Growth support -
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.6
Root system -
Rooting depth (meter) 0.3
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light 5-5
Soil humidity 5-5
Soil texture -
Soil acidity 1-5
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

Hypericum denticulatum unspecified picture

Distribution

Hypericum denticulatum world distribution map, present in United States of America

Identifiers

LSID urn:lsid:ipni.org:names:317531-2
WFO ID wfo-0000727556
COL ID 6N2DK
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Brathys linoides Hypericum denticulatum Hypericum laevigatum Hypericum denticulatum var. ovalifolium Hypericum virgatum var. ovalifolium Hypericum angulosum Hypericum denticulatum var. denticulatum Hypericum denticulatum var. typicum