Facts about Blackspot Hornpoppy (Glaucium corniculatum)

Glaucium corniculatum (L.) Rudolph:
United States (North America)
South Africa (Africa & Madagascar)

Gibbs Russell, G. E., W. G. Welman, E. Reitief, K. L. Immelman, G. Germishuizen, B. J. Pienaar, M. v. Wyk & A. Nicholas. 1987. List of species of southern African plants. Mem. Bot. Surv. S. Africa 2(1–2): 1–152(pt. 1), 1–270(pt. 2). http://www.tropicos.org/Reference/1371
Great Plains Flora Association. 1986. Fl. Great Plains i–vii, 1–1392. University Press of Kansas, Lawrence. http://www.tropicos.org/Reference/637
Flora of North America Editorial Committee, e. 1997. Magnoliidae and Hamamelidae. 3: i–xxiii, 1–590. In Fl. N. Amer. Oxford University Press, New York. http://www.tropicos.org/Reference/24627

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National Distribution

United States

Origin: Exotic

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

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Source: NatureServe

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Morphology

Comments

Glaucium corniculatum has been widely introduced outside its native Eurasian range as a crop weed and ballast waif. It can persist in a fairly broad range of climates and probably is established in North America more widely than existing herbarium records indicate.

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Description

Plants annual or occasionally biennial, to 5 dm. Stems branching. Leaves to 25 cm; basal few, blade glabrate to moderately pubescent; basal and proximal cauline with blade lyrate, 7-9-lobed; distal with blade ovate, not distinctly clasping stem (sometimes slightly cordate-clasping); margins deeply dentate. Flowers: pedicels stout, to 5 cm; sepals 15-30 mm; petals orange to reddish orange, usually with blackish basal spot, obovate, to 40 mm. Capsules sublinear, straight or slightly curved, to 25 cm, appressed- to ascending-pubescent or glabrate.

Flora of North America @ eFloras.org

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Diagnostic Description

Synonym

Chelidonium corniculatum Linnaeus, Sp. Pl. 1: 506. 1753

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Habitat

Habitat & Distribution

Flowering late spring-summer. Open shores, fields, pastures, and canyon slopes; 0-1600 m; introduced; Kans., Mont., Nev., N.Y., Oreg., Pa., Tex.; Europe; sw Asia.

Flora of North America @ eFloras.org

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Conservation Status

National NatureServe Conservation Status

United States

Rounded National Status Rank: NNA - Not Applicable

Source: NatureServe

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NatureServe Conservation Status

Rounded Global Status Rank: GNR - Not Yet Ranked

Reasons: Native of Eurasia.

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