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Balsamorhiza rosea

rosy balsamroot

lanate balsamroot, woolly balsamroot, Yreka balsamroot

Habit Plants 6–10(–30) cm. Plants 10–20(–30) cm.
Basal leaves

blades gray-green, oblong to lance-ovate, 3–10(–20) × 2–5 cm (rarely pinnately lobed), bases weakly cordate or truncate, margins crenate to serrate, apices rounded to acute, faces finely strigose to moderately scabrous (usually gland-dotted as well).

blades white to grayish, lanceolate to linear-oblong, 10–20 × 3–6(–8) cm (1–2-pinnatifid, primary lobes lance-linear to oblong, mostly 5–40 × 1–10 mm, secondary lobes or teeth antrorse, divergent), bases cuneate to truncate, ultimate margins mostly entire (± revolute), apices rounded to acute, faces densely lanate-tomentose to villous.

Involucres

hemispheric, 18–20 mm diam.

± hemispheric, 12–20 mm diam.

Ray laminae

(becoming brick-red, often drying to pink or rose, and chartaceous) (8–)15(–25) mm (hispidulous abaxially; cypselae strigose).

(10–)15–20 mm (abaxially puberulent or glabrous).

Outer phyllaries

deltate or ovate to lanceolate, 8–12 mm, not surpassing inner.

lanceolate to linear, 10–20 mm, sometimes surpassing inner, apices acute to attenuate.

Heads

usually borne singly.

borne singly.

2n

= 38.

Balsamorhiza rosea

Balsamorhiza lanata

Phenology Flowering Apr–May. Flowering Apr–May(–Jun).
Habitat Dry hills Roadsides, grassy slopes
Elevation 300–400 m (1000–1300 ft) 700–1500 m (2300–4900 ft)
Distribution
from FNA
OR; WA
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; OR
[BONAP county map]
Discussion

In a hybrid swarm involving Balsamorhiza rosea and B. careyana, B. rosea remains relatively uncontaminated; the dominance among the hybrids appears to lie with B. careyana. A record of a hybrid between B. rosea and B. careyana from the Spokane area is doubtful.

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

Of conservation concern.

Balsamorhiza lanata is known from a relatively restricted area in northern California and southern Oregon. No hybrids between it and other species have been noted.

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

Source FNA vol. 21, p. 96. FNA vol. 21, p. 97.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Ecliptinae > Balsamorhiza > subg. Balsamorhiza Asteraceae > tribe Heliantheae > subtribe Ecliptinae > Balsamorhiza > subg. Balsamorhiza
Sibling taxa
B. careyana, B. deltoidea, B. hispidula, B. hookeri, B. incana, B. lanata, B. macrolepis, B. macrophylla, B. sagittata, B. sericea, B. serrata
B. careyana, B. deltoidea, B. hispidula, B. hookeri, B. incana, B. macrolepis, B. macrophylla, B. rosea, B. sagittata, B. sericea, B. serrata
Synonyms B. hookeri var. rosea B. hookeri var. lanata
Name authority A. Nelson & J. F. Macbride: Bot. Gaz. 56: 478. (1913) (W. M. Sharp) W. A. Weber: Phytologia 85: 20. (1999)
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