Sweet-william - Dianthus barbatus
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).
Occasionally escaping as an ornamental in MT and elswhere, especially northeastern US.
Observations in Montana Natural Heritage Program Database
Number of Observations:
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(Observations spanning multiple months or years are excluded from time charts)
Old home sites and disturbed areas.
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).
- 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
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- Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.