Flora of North America species comparison

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Iliamna rivularis

mountain hollyhock, streambank globe-mallow, streambank globe-mallow or wild hollyhock, streambank wild hollyhock
Stems

0.5–2 m;

herbage sparsely stellate-hairy.
Leaf

blades deeply (3-), 5-, or 7-lobed, 5–20 cm wide, lobes triangular-ovate, broadest at base, base truncate to cordate, margins coarsely dentate.
Inflorescences

clusters forming interrupted spikes to corymbose racemes distally;

involucellar bractlets linear-subulate, 3–6(–8) × 1 mm, 1/3–2/3 as long as calyx.
Flowers

calyx 5–8(–11) mm, lobes triangular-ovate to obtuse, 2.5–4(–5.5) mm, ± as wide as long, slightly exceeding tube;

petals pinkish white to rose-purple, 1.8–2.5 cm.
Seeds

(2 or)3 or 4, dark brown, 2 mm, puberulent.
Schizocarps

10–12 mm diam.;

mericarps 8–12, 6–10 mm.
2n

= 66.

Iliamna rivularis
Phenology Flowering Jun–Aug.
Habitat Stream banks, meadows, open woodlands, disturbed places, foothills to mountain slopes
Elevation 1400–2900 m (4600–9500 ft)
Distribution
from FNA
CO; ID; MT; NM; NV; OR; UT; WA; WY; AB; BC
[WildflowerSearch map]
[BONAP county map]
Discussion

Iliamna rivularis is variable in stature, pubescence, and leaf characters. Plants of Idaho and Wyoming with distally smaller (4–10 cm), three- to five-lobed blades, truncate bases, and inconspicuously toothed margins have been recognized as var. or subsp. diversa, but fall within the morphological range of the species as a whole.

Iliamna rivularis is in the Center for Plant Conservation’s National Collection of Endangered Plants as I. rivularis var. rivularis.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 6, p. 270.
Parent taxa Malvaceae > subfam. Malvoideae > Iliamna
Sibling taxa
I. bakeri, I. corei, I. crandallii, I. grandiflora, I. latibracteata, I. longisepala, I. remota
Synonyms Malva rivularis, I. acerifolia, I. rivularis subsp. diversa, I. rivularis var. diversa, Phymosia acerifolia, P. rivularis, Sphaeralcea acerifolia, S. rivularis, S. rivularis var. diversa
Name authority (Douglas) Greene: Leafl. Bot. Observ. Crit. 1: 206. (1906)
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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