Hypericum nudiflorum Michx. ex Willd.

Early st. johnswort (en)

Species

Angiosperms > Malpighiales > Hypericaceae > Hypericum

Characteristics

Subshrubs, erect, usually loosely branched with branches ascending, 5–20 dm. Stems: internodes narrowly 4-winged at first, then terete. Leaf blades ovate-lanceolate or elliptic to linear-oblong, 30–70 × 7–25 mm, base not articulated, cuneate to subcordate, margins plane, apex obtuse to rounded, midrib with to 6 pairs of branches. Inflorescences <corymbiform to rounded-pyramidal>, 7–45-flowered, narrowly branched, sometimes with 1–7(–40)-flowered dichasia from 1–3 proximal nodes. Flowers 15–20 mm diam.; sepals deciduous, not enclosing capsule, 5, oblanceolate-spatulate to narrowly triangular, unequal to subequal, 2–5 × 1–1.5 mm; petals 5, pale or coppery yellow, oblanceolate-oblong to elliptic-oblong, 6–8(–10) × 3–4 mm, <length 2–3 times sepals>; stamens persistent, 80; ovary 3(–4)-merous, <placentation incompletely axile>. Capsules broadly ellipsoid to ovoid-globose, 3.5–7 × 3–5 mm. Seeds markedly carinate, 1.5–2 mm; testa ± scalariform-reticulate. 2n = 18.
Life form perennial
Growth form
Growth support -
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.5 - 2.0
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) 4-9

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 -

Distribution

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

Identifiers

LSID urn:lsid:ipni.org:names:433662-1
WFO ID wfo-0001296000
COL ID 6MQG5
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Brathydium nudiflorum Hypericum ledifolium Hypericum ligustrinum Hypericum nudiflorum Hypericum nudiflorum var. ovatum Hypericum nudiflorum var. ramosum