Flora of North America species comparison

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Dicentra uniflora

long-horn steer's-head, one flower dicentra, steer's-head
Habit Plants perennial, scapose, from clusters of club- to spindle-shaped tubers, small bulblets often present at proximal ends of tubers.
Leaves

4-7(-10) × (1-)3-4 cm;

petiole 2-5(-8) cm;

blade with 3-4 orders of leaflets and lobes;

surfaces pubescent near base, rarely sparsely pubescent throughout; ultimate lobes variable in shape, often oblong to spoon-shaped, (2-)6-12(-18) × 1.5-6 mm, minutely apiculate, occasionally retuse.
Inflorescences

1-flowered, barely exceeding to shorter than leaves;

bracts 1 (rarely 2) per scape, lanceolate, 4-6 × 2-3 mm.
Flowers

nodding to erect;

pedicels 2-7 mm;

petals pink to white, suffused light brown;

outer petals (7-)12-16(-20) mm, reflexed portion (4-)6-8(-10) mm;

inner petals purple-tipped, (11-)13-15(-17) mm, blade triangular to lanceolate or spoon-shaped, 4-8 mm, claw linear-oblong, 4-6 mm, crest absent;

filaments of each bundle usually distinct above base, occasionally connate just below anthers, median filament forming loop with slight indentation near base; nectariferous tissue borne along basal part of loop;

style 2-5 mm;

stigma shallowly 2-lobed, much reduced, slightly wider than style.
Capsules

ovoid, attenuate to style, 9-14 × 5-9 mm.
Seeds

reniform, ca. 1.5 mm diam., finely and obscurely reticulate, elaiosome absent.
2n

= 16.

Dicentra uniflora
Phenology Flowering very early spring–late summer.
Habitat Rocky slopes and hillsides in gravelly soils, often flowering near edges of melting snowbanks
Elevation 1500-2200(-3300) m (4900-7200(-10800) ft)
Distribution
from FNA
CA; ID; MT; NV; OR; UT; WA; WY; BC
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 3.
Parent taxa Fumariaceae > Dicentra
Sibling taxa
D. canadensis, D. chrysantha, D. cucullaria, D. eximia, D. formosa, D. nevadensis, D. ochroleuca, D. pauciflora
Name authority Kellogg: Proc. Calif. Acad. Sci. 4: 141. (1871)
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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(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Fabaceae, Apiaceae, Boraginaceae, and Polemoniaceae.)

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