Flora of North America species comparison

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Ionactis stenomeres

Ionactis elegans

Rocky Mountain ankle-aster, Rocky Mountain aster, Rocky Mountain ionactis

least-daisy, Sierra blanca ankle-aster, Sierra blanca least-daisy
Habit Plants 12–30 cm (sometimes weakly cespitose, caudices multicipital or with relatively short branches; rhizomes fibrous-rooted, thickened, becoming woody). Plants 3–5(–9) cm (with relatively short caudex branches, cespitose; taprooted).
Stems

proximally herbaceous or slightly woody, eglandular.

proximally herbaceous or slightly woody, eglandular.
Leaves

proximal separated by evident internodes, spatulate, reduced in size distally;

mid and distal linear-lanceolate, 15–25(–30) mm, margins green, faces hispidulous.

proximal densely clustered, internodes not visible, reduced in size distally;

mid and distal 5–17 mm, margins green, faces glabrous or sparsely puberulent, eglandular.
Involucres

8–13 mm.

4.5–6.5 mm.
Disc florets

bisexual, fertile;

corollas 7.5–8.5 mm.

bisexual, fertile;

corollas 3.8–5 mm.
Heads

borne singly.

1(–3).
Cypselae

5–6 mm, faces sessile- to stipitate-glandular.

2–2.5 mm, faces sessile- to stipitate-glandular.
2n

= 18.

Ionactis stenomeres

Ionactis elegans
Phenology Flowering Jun–Sep. Flowering Jun–Aug.
Habitat Dry slopes, grassy ridges, and openings Granite outcrops
Elevation 1700–2200 m (5600–7200 ft) 2500 m (8200 ft)
Distribution
from FNA
ID; MT; WA; BC
[WildflowerSearch map]
[BONAP county map]
from FNA
NM
[BONAP county map]
Discussion

Of conservation concern.

Ionactis elegans is known from a single population system in Eagle Creek Canyon, Lincoln County.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 20, p. 84. FNA vol. 20, p. 83.
Parent taxa Asteraceae > tribe Astereae > Ionactis Asteraceae > tribe Astereae > Ionactis
Sibling taxa
I. alpina, I. caelestis, I. elegans, I. linariifolia
I. alpina, I. caelestis, I. linariifolia, I. stenomeres
Synonyms Aster stenomeres Chaetopappa elegans
Name authority (A. Gray) Greene: Pittonia 3: 246. (1897) (Soreng & Spellenberg) G. L. Nesom: Phytologia 73: 420. (1992)
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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