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Sweet-william - Dianthus barbatus
Other Names:
Sweet-William
General Description
Stems simple, up to 70 cm tall, glabrous. Leaf sheaths 3-6 mm; blade 2.5-10 cm, margins finely ciliate. Inflorescences usually dense, axillary heads 5-20-flowered (or rarely flowers solitary); bracts lanceolate, equaling or longer than calyx, herbaceous, apex acute; bracteoles 4 (or 6), up to or longer than 4x length of calyx,green, ovate, herbaceous, apex long-aristate. Pedicels 0.1-2 mm. Flowers subsessile; calyx 40-veined, mostly 12-20 mm, glabrous (lobe margins may be ciliate); the lobes ovate to short-tapered, 2-7 mm; petals 4-10 mm, purple, red, spotted with white, or pink or white with (or without) dark center, bearded, apex dentate. Capsules 10-13 mm, equaling calyx length (adapted from Rabeler & Hartman, 2005, in Flora N. America, Vol. 5).
Species Range
Montana Range
Range Descriptions
Non-native
Range Comments
Occasionally escaping as an ornamental in MT and elswhere, especially northeastern US.
Observations in Montana Natural Heritage Program Database
Number of Observations: 26
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Map Help and Descriptions
Relative Density
Recency
(Observations spanning multiple months or years are excluded from time charts)
Habitat
Old home sites and disturbed areas.
Ecology
POLLINATORS The following animal species have been reported as pollinators of this plant species or its genus where their geographic ranges overlap:
Bombus occidentalis (Thorp et al. 1983).
Management
References
- Literature Cited AboveLegend:
View Online Publication
Thorp, R.W., D.S. Horning, and L.L. Dunning. 1983. Bumble bees and cuckoo bumble bees of California (Hymenoptera: Apidae). Bulletin of the California Insect Survey 23:1-79.
- Additional ReferencesLegend: View Online Publication
Do you know of a citation we're missing?- Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
- Lesica, P., M.T. Lavin, and P.F. Stickney. 2022. Manual of Montana Vascular Plants, Second Edition. Fort Worth, TX: BRIT Press. viii + 779 p.
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