UW Burke Herbarium species comparison

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Epilobium ciliatum

Epilobium obcordatum

ciliate willowherb, Watson's willowherb
Habit Perennial from spreading rhizomes that produce rosettes of leaves; stems 3-10 dm. tall, simple below and freely-branched above, puberulent, glandular above.
Leaves

Leaves opposite, short-petiolate, narrowly lanceolate to ovate-lanceolate, 3-7 cm. long, serrulate.

Flowers

Inflorescence of racemes terminal on the branches;

sepals 4, 2-5 mm. long, purplish;

petals 3-10 mm. long, notched, white or cream to deep purplish-red;

stamens 8;

stigma entire or shallowly 4-lobed;

ovary inferior, 4-celled.

Fruits

Capsule 4-8 cm. long, linear;

seeds with a tuft of white hairs on the tip.

Epilobium ciliatum

Epilobium obcordatum
Flowering time June-August
Habitat Moist soil from lowlands to middle elevations in the mountains.
Distribution
Widely distributed on both sides of the Cascades crest in Washington. Alaska to California, east across most of North America to the Atlantic Coast.
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[BONAP county map]
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[BONAP county map]
Origin Native
Conservation status Not of concern
Sibling taxa
E. anagallidifolium, E. brachycarpum, E. campestre, E. clavatum, E. densiflorum, E. glaberrimum, E. glandulosum, E. hallianum, E. hirsutum, E. hornemannii, E. komarovianum, E. lactiflorum, E. leptocarpum, E. leptophyllum, E. luteum, E. minutum, E. mirabile, E. montanum, E. oregonense, E. palustre, E. ×pulchrum, E. torreyi, E. ×treleasianum
E. anagallidifolium, E. brachycarpum, E. campestre, E. ciliatum, E. clavatum, E. densiflorum, E. glaberrimum, E. glandulosum, E. hallianum, E. hirsutum, E. hornemannii, E. komarovianum, E. lactiflorum, E. leptocarpum, E. leptophyllum, E. luteum, E. minutum, E. mirabile, E. montanum, E. oregonense, E. palustre, E. ×pulchrum, E. torreyi, E. ×treleasianum
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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