Northern Prairie Wildlife Research Center
Southern Wetland Flora
Field Office Guide to Plant Species
Hypericum gentianoides (L.) BSP.
- Family: St. Johnswort (Hypericaceae)
- Flowering: June-September
- Field Marks: This St. Johnswort differs from all others by its leaves reduced to scales and
its small yellow flowers up to 1/6 inch across.
- Habitat: Fields, roadsides, sandy pine woodlands, rock outcroppings.
- Habit: Annual herb with fibrous roots.
- Stems: Upright, wiry, much branched, smooth, up to 2 feet tall.
- Leaves: Opposite, simple, scale-like, appressed to the stem, up to 1/8 inch long, smooth.
- Flowers: Usually solitary, up to 1/6 inch across, nearly sessile.
- Sepals: 5, green, free from each other, linear-lanceolate, up to 1/8 inch long.
- Petals: 5, yellow, free from each other, up to 1/8 inch long.
- Stamens: Usually 10.
- Pistils: Ovary superior; styles 3, free from each other.
- Fruits: Capsules lanceoloid, smooth, pointed at the tip, usually becoming purplish, up to 1/3
inch long; seeds yellow.
- Notes: This species is also known as pineweed or orangeweed.
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