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Cerastium cerastoides, Cerastium dichotomum, Cerastium diffusum, Cerastium dubium, Cerastium fastigiatum, Cerastium fischerianum, Cerastium fontanum, Cerastium

tribeAsteraceae tribe Eupatorieae genusEutrochium Show Lower Taxa Eutrochium dubium, Eutrochium fistulosum, Eutrochium maculatum, Eutrochium purpureum, Eutrochium

habitats. Plants of the introduced caulescent species, especially P. rhoeas, P. dubium, and P. somniferum, vary greatly in size, and surprisingly diminutive mature

LAYOUT:treatment:TUOYAL familyLiliaceae genusSchoenocaulon Show Lower Taxa Schoenocaulon dubium, Schoenocaulon ghiesbreghtii, Schoenocaulon texanum A. Gray Ann. Lyceum

familyPapaveraceae genusPapaver sectionPapaver sect. Rhoeadium Show Lower Taxa Papaver dubium, Papaver rhoeas Spach Hist. Nat. Vég. 7: 16. 1839. Treatment appears in

familyPapaveraceae genusPapaver sectionPapaver sect. Rhoeadium speciesPapaver dubium Linnaeus Sp. Pl. 2: 1196. 1753. Common names: Long-headed poppy IllustratedIntroduced

Eutrochium dubium is restricted to the coastal plain, and inland along major river systems, of eastern North America. Identification of E. dubium has been

LAYOUT:treatment:TUOYAL familyLiliaceae genusSchoenocaulon speciesSchoenocaulon dubium (Michaux) Small Fl. S.E. U.S., 250. 1903. Dawn Frame Endemic Basionym: Helonias

subfamilyCaryophyllaceae subfam. Alsinoideae genusCerastium speciesCerastium dubium (Bastard) Guépin Fl. Maine et Loire ed. 2, 1: 267. 1838. John K. Morton

Ledebour Braya purpurascens var. dubia (R. Brown) O. E. Schulz Platypetalum dubium R. Brown Treatment appears in FNA Volume 7. Treatment on page 548. Stems

Al-Shehbaz WeedyIllustrated Synonyms: Tropidocarpum dubium Davidson Tropidocarpum gracile var. dubium (Davidson) Jepson Tropidocarpum gracile var. scabriusculum (Hooker)

Hara J. Jap. Bot. 30: 196. 1955. Ihsan A. Al-Shehbaz Basionym: Sisymbrium dubium Persoon Syn. Pl. 2: 199. 1806, Synonyms: Nasturtium heterophyllum Blume