Hypericum microsepalum (Torr. & A.Gray) A.Gray

Flatwoods st. johnswort (en)

Species

Angiosperms > Malpighiales > Hypericaceae > Hypericum

Characteristics

Shrubs, erect to ascending, bushy, with ± numerous, sometimes straggling branches, 1.5–7 dm. Stems: internodes 4-lined at first, eventually 2-lined. Leaf blades narrowly oblong or oblanceolate to linear, 5–15 × 1–3 mm, base not articulated, rounded to cuneate, margins recurved to subrevolute, apex rounded to obtuse, midrib with 1–3 pairs of branches. Inflorescences <rounded-pyramidal>, 1–3-flowered, narrowly branched, sometimes with 1–3-flowered dichasia or branches from to 4 proximal nodes. Flowers 15–25 mm diam.; sepals persistent, not enclosing capsule, (3–)4(–5), oblong or elliptic-oblong to linear, subequal or equal, 3–5 × 1–1.4 mm; petals (3–)4(–5), bright yellow, obovate (larger pair) to obovate-oblong (smaller pair), 10–12 mm; stamens persistent, 60–70; ovary 3-merous, <placentation parietal>. Capsules cylindric-ellipsoid to narrowly ovoid-conic, 6–8 × 2.5 mm. Seeds not carinate, 0.9–1 mm; testa linear-foveolate. 2n = 18.
Life form perennial
Growth form shrub
Growth support -
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.15 - 0.7
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) -

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 microsepalum world distribution map, present in United States of America

Identifiers

LSID urn:lsid:ipni.org:names:433611-1
WFO ID wfo-0001296056
COL ID 6N2GC
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Isophyllum drummondii Ascyrum microsepalum Hypericum isophyllum Hypericum microsepalum