Flora of North America species comparison

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Horkelia fusca var. filicoides
Photo is of parent taxon

Diamond Lake horkelia, pinewoods horkelia
Stems

(1–)1.5–3.5(–4) dm.
Basal leaves

green, 4–9(–12) cm;

leaflets 4–8 per side, cuneate-obovate, 5–12 × 2–8 mm, ± 1/2 as wide as long, divided ± 1/2+ to midrib into 3–9 teeth or lobes, surfaces not obscured, sparsely short-villous to glabrate.
Cauline leaves

2–4(–6);

leaflets of proximalmost 2–5 per side.
Inflorescences

green, open, comprising 1/3–1/2 of stem, flowers usually arranged individually, glandular hairs sometimes red-septate;

bracts acuminate-lobed, not obscuring pedicels and flowers at maturity.
Flowers

epicalyx bractlets 1–2 mm;

hypanthium 1–2 × 2.5–3.5 mm;

petals 2–4(–5) mm;

filaments 0.5–1 mm, ± as wide as long, anthers 0.5 mm;

styles 1 mm.
Achenes

1.2–1.5 mm.

Horkelia fusca var. filicoides
Phenology Flowering summer.
Habitat Open conifer woodlands, mainly on volcanic soil
Elevation 800–1600 m (2600–5200 ft)
Distribution
from FNA
OR
[BONAP county map]
Discussion

Variety filicoides is known from the southern Cascade Range of southwestern Oregon, primarily in open lodgepole pine forests north and west of Crater Lake. This is the only variety in which the flowers are usually arranged individually rather than clustered into glomerules, at least in fully expanded inflorescences; some populations out of the core range have more congested inflorescences and are transitional to var. parviflora in this regard.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 9, p. 260.
Parent taxa Rosaceae > subfam. Rosoideae > tribe Potentilleae > Horkelia > sect. Capitatae > Horkelia fusca
Sibling taxa
H. fusca var. brownii, H. fusca var. capitata, H. fusca var. fusca, H. fusca var. parviflora, H. fusca var. pseudocapitata, H. fusca var. tenella
Synonyms Potentilla douglasii var. filicoides, H. fusca subsp. filicoides
Name authority (Crum) M. Peck: Man. Pl. Oregon, 399. (1941)
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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