Flora of North America species comparison

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Symphyotrichum sect. Symphyotrichum
Habit Perennials; rhizomatous.
Stems

usually simple, sometimes ± branched.
Ray florets

fewer than disc florets, in 1 series (corollas conspicuous).
Disc corollas

± ampliate, lobes usually erect, sometimes spreading or reflexed.
Heads

radiate.
Pappi

shorter than to equaling disc florets at flowering.
x

= 8.

Symphyotrichum sect. Symphyotrichum
Distribution
North America; Mexico [Widely introduced worldwide through ornamental horticulture]
Discussion

Species 39+ (36 in the flora).

Subsections have been recognized within sect. Symphyotrichum. They are not treated formally here. Subsectional phylogeny is mostly unresolved. Lists of species (from the flora area) within each subsection are provided here as a rough guide to relationships.

Subsection Heterophylli (Nees) Semple: Symphyotrichum cordifolium, S. ciliolatum, S. drummondii, S. anomalum, S. shortii, S. undulatum, S. urophyllum, S. oolentangiense, S. laeve, S. retroflexum.

Subsection Porteriana (Rydberg) G. L. Nesom: Symphyotrichum depauperatum, S. parviceps, S. pilosum, S. porteri, S. priceae.

Subsection Dumosi (Torrey & A. Gray) G. L. Nesom: Symphyotrichum dumosum, S. simmondsii, S. racemosum, S. eulae, S. tradescantii, S. lateriflorum, S. ontarionis, S. lanceolatum, S. praealtum, S. boreale, S. nahanniense, S. welshii.

Subsection Symphyotrichum: Symphyotrichum elliottii, S. puniceum, S. firmum, S. rhiannon, S. prenanthoides, S. novi-belgii, S. anticostense, S. robynsianum.

Undeteremined [often treated as monotypic sect. Turbinelli (Rydberg) Semple]: Symphyotrichum turbinellum.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 20, p. 500.
Parent taxa Asteraceae > tribe Astereae > Symphyotrichum > subg. Symphyotrichum
Subordinate taxa
Name authority unknown
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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