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

Core's wild hollyhock, Peter's Mountain mallow

Stems

0.5–2 m;

herbage sparsely stellate-hairy.

1–1.5 m;

herbage 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.

blades 5- or 7-lobed, 5–10 cm wide, terminal lobe triangular, base ± truncate, margins serrate to nearly entire, sinuses narrow, acute.

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.

2- or 3-flowered clusters, sometimes solitary flowers, forming interrupted spikes distally;

involucellar bractlets filiform, 6–8 × 1 mm, 1/2–2/3 times 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.

odorless;

calyx 12 mm, lobes broadly lanceolate, long-acuminate, 6–8 mm, longer than wide, longer than tube;

petals pale pink to deep rose, 2.5 cm.

Seeds

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

2(or 3), dark brown, 2.5 mm, puberulent.

Schizocarps

10–12 mm diam.;

mericarps 8–12, 6–10 mm.

12 mm diam.;

mericarps 11–16, 10 mm.

2n

= 66.

Iliamna rivularis

Iliamna corei

Phenology Flowering Jun–Aug. Flowering late Jun–Aug.
Habitat Stream banks, meadows, open woodlands, disturbed places, foothills to mountain slopes Open, shrubby woodlands in pockets of soil among sandstone outcrops
Elevation 1400–2900 m (4600–9500 ft) 700–800 m (2300–2600 ft)
Distribution
from FNA
CO; ID; MT; NM; NV; OR; UT; WA; WY; AB; BC
[WildflowerSearch map]
[BONAP county map]
from FNA
VA
[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.)

Of conservation concern.

Iliamna corei is known from a single locality on Peters Mountain at Narrows, Virginia. The species is considered critically imperiled globally. Whether it is distinct or not from I. remota, with which it is sometimes allied, has been problematic, but recent genetic studies support their recognition as distinct species (T. A. Bodo Slotta and D. M. Porter 2006).

Iliamna corei is in the Center for Plant Conservation’s National Collection of Endangered Plants.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 6, p. 270. FNA vol. 6, p. 271.
Parent taxa Malvaceae > subfam. Malvoideae > Iliamna Malvaceae > subfam. Malvoideae > Iliamna
Sibling taxa
I. bakeri, I. corei, I. crandallii, I. grandiflora, I. latibracteata, I. longisepala, I. remota
I. bakeri, I. crandallii, I. grandiflora, I. latibracteata, I. longisepala, I. remota, I. rivularis
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 I. remota var. corei
Name authority (Douglas) Greene: Leafl. Bot. Observ. Crit. 1: 206. (1906) (Sherff) Sherff: Amer. J. Bot. 36: 503. (1949)
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