Hypericum mutilum L.
small Canadian St. John's-wort (dwarf St. Johnswort)
Clusiaceae
Introduction to Vascular Plants
small Canadian St. John's-wort (dwarf St. Johnswort)
Clusiaceae
Introduction to Vascular Plants
SUBTAXA PRESENT IN BC
Hypericum mutilum var. mutilum
Species Information
General:
Perennial or sometimes annual herb from a fibrous root; stems erect, much branched above, glabrous, 10-75 cm tall.
Leaves:
Stem leaves lanceolate to elliptic or rounded, unstalked, obtuse to abruptly sharp-pointed, 3-5 nerved, 1-3 cm long, 0.5-1.5 cm wide, partly clasping at the base, glabrous.
Flowers:
Inflorescence 20-100 flowered, spreading; petals orange-yellow, 1-2 mm long; sepals linear-oblong, abruptly sharp-pointed, 2-3 mm long; stamens less than 20; styles 3.
Fruits:
Membranous capsules, 2.5-4.0 mm long; seeds yellowish, 0.5 mm long, longitudinally grooved and finely transversely corrugate.
Illustration
If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.
Illustration Source: The Illustrated Flora of British Columbia
USDA Species Characteristics
Flower Colour:
Yellow
Blooming Period:
Mid Summer
Fruit/Seed characteristics:
Colour: Brown
Present from Summer to Fall
Source: The USDA
Habitat and Range
Wet to moist river banks and disturbed areas in the lowland zone; rare in SW BC, known only from the lower Fraser Valley; introduced from E North America.Synonyms
Synonyms and Alternate Names:
Hypericum mutilum subsp. boreale (Britton) J.M. Gillett
Hypericum mutilum var. latisepalum Fernald
Hypericum mutilum var. parviflorum (Willd.) Fernald