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Naturalized flora of The Morton Arboretum
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Ionactis alpina
(Nutt.) Greene
Family:
Asteraceae
Lava Ankle-Aster
[
Aster scopulorum
A. Gray,
more
Chrysopsis alpina
Nutt.
]
Tracey Slotta
FNA
Resources
Guy L. Nesom in Flora of North America (vol. 20)
Plants
5-12(-20) cm (sometimes weakly cespitose, caudices multicipital or with relatively short branches; rhizomes fibrous-rooted, thickened, becoming woody).
Stems
proximally herbaceous or slightly woody, eglandular.
Leaves
: proximal separated by evident internodes, spatulate, reduced in size distally; mid and distal ovate to oblong or linear, 4-15 mm, margins narrowly whitish hyaline, faces densely scabrous-hispidulous.
Heads
borne singly.
Involucres
7-10 mm.
Disc florets
bisexual, fertile; corollas 5.5-7.5 mm.
Cypselae
5-6 mm, faces eglandular.
2
n
= 18, 36.
Flowering May-Jul. Dry ridges, slopes, and flats, commonly with sagebrush; 1300-2000(-3300) m; Calif., Idaho, Mont., Nev., Oreg., Utah, Wyo.
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