UW Burke Herbarium species comparison

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Hypericum majus

Hypericum scouleri

greater Canadian St. John's-wort

Norton's St. John's-wort, Scouler's St. John's-wort, western John's-wort
Habit Perennial from short, leafy rhizomes, the stems upright, 1-5 dm. tall, simple or branched above. Perennial from wide-spread rhizomes and stolons, the stems erect, usually many, 1-8 dm. tall, simple to freely-branched.
Leaves

Leaves opposite, sessile, lanceolate to oblong, rounded, 1-3.5 cm. long, 5- to 7-nerved.

Leaves opposite, sessile, oblong-elliptic to ovate-lanceolate, 1-3 cm. long, purplish-black dotted, the bases somewhat clasping.
Flowers

Inflorescence of terminal cymes with small, linear bracts;

sepals 5, lanceolate, 4-7 mm. long;

petals 5, yellow, about equal to the sepals;

stamens 15-35, the filaments almost capillary, distinct;

styles 3, short.

Inflorescence of few-flowered, leafy-bracteate cymes;

sepals 5, triangular to ovate-lanceolate, purplish-black dotted, rounded;

petals 5, pale to bright yellow, about twice the length of the sepals, conspicuously purplish-black dotted along the margins;

stamens 75-100, attached at the base into 3 distinct groups;

styles 3, slender, 3-5 mm. long.
Fruits

Capsule 3-celled.

Capsule 6-9 mm. long, 3-celled.

Hypericum majus

Hypericum scouleri
Flowering time July-September June-September
Habitat Peatlands, shores, damp sand, and cranberry farms. Moist places from along the coast to well up in the mountains.
Distribution
Occurring on both sides of the Cascades crest in Washington; British Columbia to Oregon, east to the Atlantic Coast.
[WildflowerSearch map]
[BONAP county map]
Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains.
[WildflowerSearch map]
[BONAP county map]
Origin Both native and introduced from eastern North America Native
Conservation status Sensitive in Washington (WANHP) Not of concern
Sibling taxa
H. anagalloides, H. androsaemum, H. boreale, H. calycinum, H. canadense, H. ellipticum, H. maculatum, H. mutilum, H. perforatum, H. scouleri, H. tetrapterum
H. anagalloides, H. androsaemum, H. boreale, H. calycinum, H. canadense, H. ellipticum, H. maculatum, H. majus, H. mutilum, H. perforatum, H. tetrapterum
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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