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globe mallow, wild hollyhock

large-flower wild hollyhock

Habit Subshrubs or perennial herbs, often woody at base, glabrate to densely pubescent, hairs variously stellate to simple.
Stems

solitary to many, erect or ascending, rarely decumbent.

1–2 m;

herbage sparsely stellate-pubescent to glabrate.

Leaf

blades deeply 5- or 7-lobed, 6–13 cm wide, lobes lanceolate to triangular, middle lobe ± equaling to 2 times length of lateral lobes, base truncate to cordate, margins coarsely dentate.

Inflorescences

clusters forming interrupted spikes to racemes;

involucellar bractlets lanceolate-ovate, 8–12 × 2–3 mm, 3/4 as long as calyx.

Flowers

calyx somewhat accrescent or not, not inflated, lobes not strongly ribbed, lanceolate to ovate or ovate-triangular;

corolla campanulate to subrotate, whitish or pinkish to rose-purple, exceeding calyx;

staminal column ± included;

filaments terminal and subterminal;

ovary (6–)10–15(or 16)-carpellate;

ovules 2 or 3(or 4) per carpel;

styles (6–)10–15(or 16)-branched, (branches equal in number to carpels);

stigmas terminal, obliquely capitate.

calyx 11–18 mm, lobes triangular-ovate, 8–10 × 5–8 mm, broader than long, exceeding tube, densely villous-hirsute;

petals pink, drying purplish, 2–3 cm.

Fruits

schizocarps, erect, not inflated, subglobose, apically retuse, moderately indurate;

mericarps (6–)10–15(or 16), drying black, 1-celled, oblong in lateral view, rounded at apex, thin-walled, smooth laterally, without dorsal spur, densely pubescent dorsally and apically with coarse, hirsute, velutinous simple hairs overlaying stellate hairs, sides smooth, glabrous, dehiscence loculicidal except ventral-basally where joined to columella by vascular bundles.

Seeds

2 or 3(or 4) per mericarp, reniform to obovate-reniform, glabrate or puberulent marginally with simple, white to tawny hairs 1–2 mm.

2 or 3, dark brown, 2.5–3 mm, muricate, with few simple hairs.

Distinct

.

Schizocarps

12–15 mm diam.;

mericarps 12, 10 mm.

x

= 33.

Iliamna

Iliamna grandiflora

Phenology Flowering Jun–Aug.
Habitat Wet mountain meadows, open woodlands, stream courses
Elevation 2000–2700 m (6600–8900 ft)
Distribution
from USDA
North America
[BONAP county map]
from FNA
AZ; CO; NM; UT
[BONAP county map]
Discussion

Iliamna comprises one widespread species of the mountainous West (I. rivularis), and seven local species (two eastern and five western) differing principally but modestly in pubescence, leaf, involucellar bractlet, and calyx characters, and exhibiting varying degrees of intergradation. All, with the exception of I. bakeri, are species of relatively mesic, open woodlands, scrub, and meadows, often along stream banks. Each of the species apparently regenerates following disturbance or fire, sometimes in dense stands.

Species 8 (8 in the flora).

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

Key
1. Involucellar bractlets 8–14 × 2–6 mm, 3/4 to exceeding calyx length
→ 2
1. Involucellar bractlets 3–10 × 1 mm, 1/3–2/3 calyx length
→ 3
2. Involucellar bractlets lanceolate-ovate, 8–12 × 2–3 mm, 3/4 calyx length.
I. grandiflora
2. Involucellar bractlets elliptic-lanceolate to -ovate, 10–14 × 4–6 mm, equaling or exceeding calyx length.
I. latibracteata
3. Calyces at anthesis 5–8(–11) mm; involucellar bractlets 3–6(–8) mm.
I. rivularis
3. Calyces 9–20 mm; involucellar bractlets (5–)6–10 mm
→ 4
4. Calyx lobes ovate to triangular-ovate, ± as wide as long, ± equaling tube in length
→ 5
4. Calyx lobes lanceolate to narrowly ovate, longer than wide, exceeding tube in length
→ 6
5. Leaf blades 6–20 cm wide, (3-)5- or 7-lobed, terminal lobe triangular-ovate, sinuses broad.
I. remota
5. Leaf blades 1.5–8 cm wide, shallowly and crenately 3-lobed or deeply 3- or 5-lobed, terminal lobe narrowly oblong, sinuses narrow.
I. bakeri
6. Calyx 9–12 mm; involucellar bractlets 6–8 mm.
I. corei
6. Calyx 15–20 mm; involucellar bractlets 5–10 mm
→ 7
7. Calyces and stems pubescent with simple and stellate hairs; petals deep rose-purple; plants 1–2 m.
I. longisepala
7. Calyces and stems obscurely pubescent with fine stellate hairs; petals whitish or pinkish; plants 0.5–0.7 m.
I. crandallii
Source FNA vol. 6, p. 268. Author: David M. Bates. FNA vol. 6, p. 271.
Parent taxa Malvaceae > subfam. Malvoideae Malvaceae > subfam. Malvoideae > Iliamna
Sibling taxa
I. bakeri, I. corei, I. crandallii, I. latibracteata, I. longisepala, I. remota, I. rivularis
Subordinate taxa
I. bakeri, I. corei, I. crandallii, I. grandiflora, I. latibracteata, I. longisepala, I. remota, I. rivularis
Synonyms Sphaeralcea grandiflora, I. angulata, Phymosia grandiflora
Name authority Greene: Leafl. Bot. Observ. Crit. 1: 206. (1906) (Rydberg) Wiggins: Contr. Dudley Herb. 1: 223. (1936)
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