Horkelia truncata
Horkelia yadonii
Ramona horkelia
Santa Lucia horkelia, Yadon's or Santa Lucia horkelia
erect, 2–6(–8) dm, hairs spreading.
ascending to erect, (0.5–)2–6(–7) dm, hairs spreading.
planar, 4–13 × 2–3.5(–4) cm;
stipules entire or basally lobed;
leaflets 1–3 per side, separate, oblong to obovate, 10–30 × 5–12(–15) mm, ± 1/2 as wide as long, divided 1/6–1/4 to midrib into (15–)20–30 acute to obtuse teeth, sparsely short-pilose to glabrate, especially adaxially.
± planar, (3–)6–20(–32) × 0.5–1.5(–2) cm;
stipules entire;
leaflets 7–16 per side, separate to ± overlapping especially distally, broadly cuneate to nearly round, (3–)4–15(–17) × (2–)5–12 mm, 3/4 to nearly as wide as long, divided 1/5–1/2 to midrib into (3–)8–15(–30) acute to obtuse teeth, often medially notched as well 1/3–2/3 to midrib, villous.
4–7.
3–5.
open, flowers arranged individually.
open, flowers arranged individually and in glomerules.
4–20(–30) mm.
1–7(–20) mm.
12–17 mm diam.;
epicalyx bractlets broadly ovate, 3–4.5 × 2–3 mm, ± 2/3 length of sepals, entire;
hypanthium 1.5–2 × 5–8 mm, less than 1/2 as deep as wide, interior glabrous;
sepals ± reflexed, broadly ovate, 3.5–5.5 mm;
petals obovate to round, 5–7 × (3–)4–7 mm, apex ± rounded;
filaments 1–2 × 0.5–2 mm, anthers 0.8–1 mm;
carpels 50–80;
styles 1.5–3 mm.
8–12 mm diam.;
epicalyx bractlets lanceolate to ovate, 1.5–4.5 × 1–2(–2.5) mm, 1/2–3/4 length of sepals, entire;
hypanthium 1.5–3 × 3–6.5 mm, less than 1/2 as deep as wide, interior sparsely pilose;
sepals spreading to ± reflexed, lanceolate, (3–)4–6.5 mm;
petals broadly oblanceolate-elliptic, 3–5.5 × 2–3 mm, apex truncate;
filaments 1–2 × 0.5–1 mm, anthers 0.8–1.2 mm;
carpels 20–60;
styles 2.5–3 mm.
brown, 1.3–1.5 mm, smooth.
brown, 1.5 mm, smooth.
Horkelia truncata
Horkelia yadonii
Of conservation concern.
Horkelia truncata is confined to the Peninsular Ranges of San Diego County, California, and northern Baja California, Mexico. Plants of the species are unusual in Horkelia in that the terminal leaflet is usually notably larger than the lateral leaflets, unlobed, and distinct, rather than confluent with the distal lateral ones.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Of conservation concern.
Horkelia yadonii is known only from localized populations in the La Panza, San Rafael, and Santa Lucia ranges of Monterey, San Luis Obispo, and Santa Barbara counties. The isolated populations often differ in such characters as general size, leaf proportions, and shape of epicalyx bractlets. The most distinctive extreme, in Monterey County, is characterized by relatively long, narrow leaves, small, few-toothed leaflets, long pedicels, few small flowers, and ovate bractlets. These differences, however, are not consistently or sharply defined.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
CA
WildflowerSearch
iNaturalist
USDA Plants Database
