Horkelia fusca var. filicoides
Horkelia sect. Capitatae
Diamond Lake horkelia, pinewoods horkelia
(1–)1.5–3.5(–4) dm.
ascending to erect, (0.6–)1–6(–9) dm.
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.
planar;
stipules entire;
leaflets 3–8(–15) per side, separate, sometimes ± overlapping, divided 1/5–3/4+ to midrib into (3–)5–15 teeth or lobes not restricted to apex.
2–4(–6);
leaflets of proximalmost 2–5 per side.
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.
open to ± congested, flowers usually arranged in ± capitate glomerules, arranged individually in H. fusca var. filicoides.
remaining ± straight, outermost sometimes ± reflexed in congested inflorescences, 1–3(–10) mm.
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.
epicalyx bractlets linear, 0.2–0.3(–0.5) mm wide, entire;
hypanthium interior glabrous;
sepals acute to acuminate;
petals white to pale pink, often veined with pink to rose, ± oblanceolate to cuneate, apex emarginate to truncate or rounded;
filaments white, glabrous, anthers longer than wide;
carpels 10–25.
1.2–1.5 mm.
1–1.8 mm, smooth.
Horkelia fusca var. filicoides
Horkelia sect. Capitatae
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.)
Species 1.
Rydberg recognized seven species in his group Capitatae, treated here as intergrading variation within a single species. Plants of the section share the characteristic Horkelia odor, glandularity, and planar leaves of sect. Horkelia, but differ in the combination of relatively small, short-pedicelled flowers that (except for var. filicoides) are most commonly aggregated into one or more capitate, purple-suffused glomerules, with linear epicalyx bractlets, oblanceolate-cuneate petals that are often pink-tinged, and relatively short, broad filaments.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
OR
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
