Phytologia 28: 82. 1974.
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 irregularly 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: Flowering Sep–Dec.
Habitat: Rich soils, along streams, rocky slopes
Elevation: 800–1500 m
Ariz., N.Mex., Mexico
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.
"fine" is not a number.