Hypericum setosum L.

Hairy st. johnswort (en)

Species

Angiosperms > Malpighiales > Hypericaceae > Hypericum

Characteristics

Herbs annual or perennial, erect, usually unbranched proximal to inflorescence, 2–8 dm. Stems: internodes 4-lined, <scabrous-tomentose to pilose>. Leaves appressed to ascending, sessile; blade narrowly ovate or lanceolate to narrowly oblong-elliptic (or proximal oblanceolate), 4–15 × 1.5–7 mm, subcoriaceous, margins recurved, apex acute to obtuse, <surfaces scabrous-tomentose to pilose>, basal veins 1(–5), midrib with 0–1 pair of branches. Inflorescences cylindric to subcorymbiform, to 30-flowered, branching mostly dichasial. Flowers 5–11 mm diam.; sepals ovate to ovate-lanceolate or obovate, subequal, 2.5–5 × 1.5–2.5 mm, <margins setulose-ciliate>, apex acute; petals 5, deep yellow, obovate, 4–7 mm; stamens (15–)20–40, filaments almost distinct; styles 1.5–2 mm; stigmas ± broadly capitate. Capsules ovoid to ellipsoid-subglobose, 3.5–5 × 2–3 mm. Seeds 0.4–0.6 mm; testa linear-reticulate. 2n = 12.
More
Pubescent throughout; stems 3–8 dm, simple or virgately branched above; lvs numerous, erect, lanceolate to ovate, 5–15 mm, gradually reduced upwards; sep ciliate; pet 5–7 mm; stamens 20–40; styles 3(4), 1.5–2 mm; otherwise much like no. 20 [Hypericum denticulatum Walter]; 2n=12. Bogs and wet soil on the coastal plain; se. Va. to Fla. and La. June–Sept.
Life form perennial
Growth form herb
Growth support -
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.2 - 0.8
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color -
Blooming months -
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light -
Soil humidity -
Soil texture -
Soil acidity -
Soil nutriment -
Hardiness (USDA) 4-10

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 -

Distribution

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

Identifiers

LSID urn:lsid:ipni.org:names:317537-2
WFO ID wfo-0001295910
COL ID 3NQ6H
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Ascyrum villosum Brathys tomentosa Hypericum nuttallii Hypericum simplex Hypericum pilosum Hypericum setosum