eastern. T. C. Frye (1937) combined A. selwynii and A. altecristatum, as A. undulatum var. selwynii (Austin) Frye. The easternmost outpost of A. selwynii is
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Keller H. anagalloides var. ramigerum R. Keller H. anagalloides var. undulatum R. Keller H. bryophytum H. tapetoides Treatment appears in FNA Volume 6
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white distally, superficially resembling T. undulatum. Dried specimens, when hastily examined, resemble T. undulatum superficially and probably account for
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Map Legacy Map Ga., N.C., S.C., Tenn. Plagiomnium carolinianum and P. undulatum, an apparent introduction in British Columbia, are differentiated from
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Eriogonum turneri Reveal is not treated here; it is related to E. jamesii var. undulatum, and is known only from gypsum outcrops in Nuevo León, Mexico. None. Eriogonum
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genera, especially some of those in Hypnaceae, in the family. Plagiothecium undulatum has been removed to Buckiella and placed in Hypnaceae (R. R. Ireland 2001)
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pycnostachya Michaux Fl. Bor.-Amer. 2: 126. 1803 Synonyms: Pterocaulon undulatum C. Mohr Treatment appears in FNA Volume 19. Treatment on page 476. Plants
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related to C. undulatum and perhaps should be treated as a variety of that species. Pending a comprehensive study of the variation within C. undulatum, I have
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humboldtense Rydberg Cirsium neomexicanum var. utahense (Petrak) S. L. Welsh Cirsium undulatum var. albescens D. C. Eaton Cirsium utahense Treatment appears in FNA Volume
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ecology poorly documented. It may possibly be an introduction, like Atrichum undulatum, another common European species believed to be introduced here. None.
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Large-headed plants of Cirsium tracyi and small-headed individuals of C. undulatum are sometimes difficult to distinguish. P. L. Barlow-Irick (unpubl.) found
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basally; bracts strongly petiolate; ovary 3-lobed or -angled Trillium undulatum 9 Petals uniformly white or pink, or with faint pink blush, no distinct
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This species is sometimes confused with an environmental form of Dicranum undulatum that has nearly percurrent costae and ± acute apices. The aggregate setae
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It is known to hybridize with C. muticum and C. undulatum. Hybrids between C. flodmanii and C. undulatum are highly sterile with numerous meiotic irregularities
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environments on banks along streams and at margins of fens and swamps. Atrichum undulatum, on the other hand, prefers dry weedy habitats, and when sterile can be
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has been reported with S. urophyllum, as well as with S. shortii or S. undulatum (the name Aster ×finkii Rydberg possibly applies to such hybrids). None
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western Oklahoma, and northern and western Texas. It merges with var. undulatum in southeastern Arizona, southern New Mexico, and especially western Texas
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documented in Apache County, Arizona, and between var. coloradense and C. undulatum in Las Animas County, Colorado. None. None. window.propertiesFromHighe
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widening at the strongly auriculate-clasping petiolar bases Symphyotrichum undulatum 46 Cauline leaves ± narrowly winged-petiolate, the wings not widening at
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americanum and C. canescens and between C. scariosum var. americanum and C. undulatum. None. None. window.propertiesFromHigherTaxa=[{"rank":"species","name":"Cirsium
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