Dicentra uniflora

Kellogg

Proc. Calif. Acad. Sci. 4: 141. 1871.

Common names: Steer's-head
EndemicIllustrated
Treatment appears in FNA Volume 3.

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.


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

Distribution

V3 1053-distribution-map.gif

B.C., Calif., Idaho, Mont., Nev., Oreg., Utah, Wash., Wyo.

Discussion

Selected References

None.

Lower Taxa

None.

"thin" is not a number."slightly wider" is not a number.

... more about "Dicentra uniflora"
Kingsley R. Stern +
Kellogg +
swollen +
triangular;lanceolate or spoon-shaped +
0.4 cm4 mm <br />0.004 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
lanceolate +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
connate +  and distinct +
dehiscent +  and indehiscent +
0.9 cm9 mm <br />0.009 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
attenuate +  and ovoid +
0.5 cm5 mm <br />0.005 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
linear-oblong +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Steer's-head +
cordate +  and oblong +
B.C. +, Calif. +, Idaho +, Mont. +, Nev. +, Oreg. +, Utah +, Wash. +  and Wyo. +
1500-2200(-3300) m +
nodding +  and erect +
each +  and plane +
dehiscent +  and indehiscent +
Rocky slopes and hillsides in gravelly soils, often flowering near edges of melting snowbanks +
corymbose +, racemose +  and paniculate +
terminal +, leaf-opposed +, extra-axillary +  and axillary +
1.5 cm15 mm <br />0.015 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
1.3 cm13 mm <br />0.013 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
7 cm70 mm <br />0.07 m <br /> (10 cm100 mm <br />0.1 m <br />) +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
4 cm40 mm <br />0.04 m <br /> (7 cm70 mm <br />0.07 m <br />) +
cauline +  and basal +
3 cm30 mm <br />0.03 m <br /> (4 cm40 mm <br />0.04 m <br />) +
serrate +, crenate +  and entire +
1.6 cm16 mm <br />0.016 m <br /> (2 cm20 mm <br />0.02 m <br />) +
3 +, both +  and 1 +
keeled +, spurred +  and swollen +
1.2 cm12 mm <br />0.012 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
dissimilar +  and alike +
obovoid;narrowly cylindric +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
suffused light-brown;pink;white +
connate +  and coherent +
not spongy +
5 cm50 mm <br />0.05 m <br /> (8 cm80 mm <br />0.08 m <br />) +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
Flowering very early spring–late summer. +
perpendicular +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Proc. Calif. Acad. Sci. +
reniform +
Endemic +  and Illustrated +
hollow +, branching +  and simple +
climbing +  and prostrate +
persistent +
reduced +
thread-like +
0.2 cm2 mm <br />0.002 m <br /> (?) +  and 0.5 cm5 mm <br />0.005 m <br /> (?) +
Bikukulla +
Dicentra uniflora +
Dicentra +
species +
club;spindle-shaped +
1.2 cm12 mm <br />0.012 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
retuse +, oblong +  and spoon-shaped +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +