Horkelia fusca var. fusca

Endemic
Synonyms: Horkelia tenuisecta Rydberg Potentilla douglasii var. tenuisecta (Rydberg) Crum
Treatment appears in FNA Volume 9. Treatment on page 260.

Stems 3–4 (–5) dm. Basal leaves green, (4–) 8–20 cm; leaflets 6–10 per side, cuneate-obovate, 5–18 (–20) × 4–15 mm, 1/2 to nearly as wide as long, divided ± 1/2 to midrib into 5–8 teeth or lobes, surfaces not obscured, ± sparsely short-villous. Cauline leaves (2 or) 3–5; leaflets of proximalmost 3–6 per side. Inflorescences reddish purple, congested to open, comprising less than 1/4 of stem, usually composed of 10–20-flowered glomerules, rarely flowers arranged individually, glandular-hairs often ± red-septate; bracts acute to acuminate-lobed, not obscuring pedicels and flowers at maturity. Flowers: epicalyx bractlets 1.5–3 mm; hypanthium 1.5–3 × 2.5–4 mm; petals 3–5 mm; filaments 0.5–1.3 mm, longer than wide, anthers 0.5–0.6 mm; styles 1–1.5 mm. Achenes 1.6–1.8 mm.


Phenology: Flowering summer.
Habitat: Moist meadows, in conifer woodlands, mainly on volcanic soil
Elevation: 100–1500 m

Discussion

Variety fusca occurs in the Cascade Ranges on both sides of the Columbia River Gorge, primarily around Mount Hood, Oregon, and Mount Adams, Washington. Pending further analysis, all collections of the species from the Cascade Range in Washington are treated here as var. fusca, including some with leaflets and/or petals in the size range of var. parviflora. Plants from lower elevations tend to have greener, more openly branched inflorescences and narrower, more finely divided leaflets; this expression provides the type of Horkelia tenuisecta.

Selected References

None.

Lower Taxa

None.

"/2lengthoftonearlyequaltosepals" is not declared as a valid unit of measurement for this property."dm" is not declared as a valid unit of measurement for this property.

... more about "Horkelia fusca var. fusca"
1.6mm +  and 1.8mm +
longer than wide +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
pink +  and rose +
Barbara Ertter +  and James L. Reveal +
Lindley +
compound +  and simple +
opposite +  and alternate +
20 cm200 mm <br />0.2 m <br /> (40 cm400 mm <br />0.4 m <br />) +
4 cm40 mm <br />0.04 m <br /> (8 cm80 mm <br />0.08 m <br />) +
4 cm40 mm <br />0.04 m <br /> (7 cm70 mm <br />0.07 m <br />) +
4 cm40 mm <br />0.04 m <br /> (20 cm200 mm <br />0.2 m <br />) +
8 cm80 mm <br />0.08 m <br /> (20 cm200 mm <br />0.2 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (4 cm40 mm <br />0.04 m <br />) +
flattened +
Capitatae +
30 cm300 mm <br />0.3 m <br /> (40 cm400 mm <br />0.4 m <br />) +
planar +  and cylindric +
2 cm20 mm <br />0.02 m <br /> (30 cm300 mm <br />0.3 m <br />) +
acute +  and acuminate-lobed +
reduced +
free +  and distinct +
open to congested +
Oreg. +  and Wash. +
not +  and aggregated +
100–1500 m +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
longer than wide +
flattened +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
unisexual +  and bisexual +
not +  and aggregated +
obliquely ovoid +  and reniform +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
Moist meadows, in conifer woodlands, mainly on volcanic soil +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.55 cm5.5 mm <br />0.0055 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
congested +  and open +
crassinucellate +
opposite +  and alternate +
marcescent +
winter-persistent +
overlapping +  and separate +
1.8 cm18 mm <br />0.018 m <br /> (2 cm20 mm <br />0.02 m <br />) +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
glabrate +, sparsely +  and more or less densely short-villous or hirsute +
divided +  and cuneate-obovate +
0.4 cm4 mm <br />0.004 m <br /> (?) +  and 1.5 cm15 mm <br />0.015 m <br /> (?) +
oblanceolate +
palmate +  and pinnate +
shallowly toothed +  and deeply divided +
inferior +  and superior +
clustered +, biseriate +  and superposed +
0.3 cm3 mm <br />0.003 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0 (?) +  and 4 (?) +
0.6 cm6 mm <br />0.006 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
free +  and distinct +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Flowering summer. +
adnate +, free +, connate +  and distinct +
Edwards’s Bot. Reg. +
not arillate +
0.4 cm4 mm <br />0.004 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
persistent +
free +  and distinct +
spreading +  and more or less reflexed +
lanceolate +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
free +  and distinct +
branched +  and simple +
stramineous +, reddish +  and green +
ascending +  and erect +
0 +  and 1/4 +
palmate +  and pinnate +
deciduous +
distinct +
subterminal +
filiform +
rough-thickened +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
not obscured +
short-villous +
Horkelia tenuisecta +  and Potentilla douglasii var. tenuisecta +
Horkelia fusca var. fusca +
Horkelia fusca +
variety +
5 +  and 8 +
oblanceolate +  and obovate +
inconspicuous +
enlarged +
grayish +, reddish +  and green +
hairy +  and inconspicuously conspicuously glandular +