Compilation
Eupatorium sonorae

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Name

Identification
Eupatorium sonorae A. Gray [family ASTERACEAE ] (stored under name); Verified by A. Gray, 1853 Fleischmannia sonorae (A. Gray) R. M. King & H. Robinson [family ASTERACEAE ] Verified by R. M. King & H. Robinson (US), 1984 Eupatorium sonorae A. Gray [family ASTERACEAE ] Verified by A. Gray, Eupatorium pycnocephalum Less. [family ASTERACEAE ] Verified by A. Gray,
Related name
  • Fleischmannia pycnocephala
  • Fleischmannia sonorae
  • Eupatorium pycnocephalum
  • Eupatorium sonorae
  • Eupatorium schiedeanum
  • Eupatorium multinerve
Common name
  • Sonoran slender-thoroughwort, Flora of North America Vol. 21

Flora

Entry for Fleischmannia sonorae (A. Gray) R. M. King & H. Robinson [family COMPOSITAE]
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 21,
Names
Fleischmannia sonorae (A. Gray) R. M. King & H. Robinson [family COMPOSITAE], Phytologia, 28: 82. 1974
Eupatorium sonorae A. Gray [family COMPOSITAE], Smithsonian Contr. Knowl., 5(6): 74. 1853
Treatment Author(s)
Guy L. Nesom
Information
Plants 30–80 cm. Stems erect to ascending-erect (not sprawling-scandent). Leaves: petioles 0.5–3 cm; blades deltate-ovate, 1.5–5 × 0.6–2 cm, bases broadly cuneate to subtruncate, margins irreg-ularly crenate-serrate, apices acute to acuminate. Involucres (4–)5–6 mm. Phyllaries: ovate (outer) or elliptic (inner), glabrous, apices usually obtuse to rounded, rarely truncate. Corollas usually pale purple, rarely white. Cypselae 1–1.2(–1.5) mm, glabrous or glabrate.
Phenology
sep-nov (fall), dec (winter)
Altitude range
800–1500 m;
Distribution
Mexico.USA Ariz.USA N.Mex.
Discussion
Fleischmannia sonorae was reported for Arizona by T. H. Kearney and R. H. Peebles (1960) and F. Shreve and I. L. Wiggins (1964) as Eupatorium pycnocephalum Lessing [= Fleischmannia pycnocephala (Lessing) R. M. King & H. Robinson)]; revised concepts of this species group (B. L. Turner 1996+, vol. 2) place F. pycnocephala as a related species in Mexico and Central America, not reaching northwestward to Arizona.

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