Flora of North America species comparison

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Horkelia cuneata var. cuneata

Rosaceae subfam. rosoideae
Photo is of parent taxon

wedge leaf horkelia
Habit Plants ± green; eglandular hairs moderately abundant, spreading to ascending, glandular hairs usually evident. Herbs, shrubs, or subshrubs.
Stems

ascending to erect, (1–)2–5 dm.

Leaves

alternate, rarely opposite, pinnately compound, sometimes simple or palmately compound;

stipules present, rarely absent.
Leaflets

5–12 per side, elliptic to obovate or oblanceolate, 5–15 mm, distinctly pinnately veined.

Inflorescences

± open;

most flowers arranged in glomerules.

Pedicels

1–5 mm, proximalmost to 15 mm.

Flowers

hypanthium interior rim ± pilose;

petals oblanceolate, 2.5–3.5 mm wide;

filaments 1.5–3 × 0.5–1 mm.

torus usually enlarged, sometimes small or absent;

carpels 1–260(–450), distinct, free, styles distinct, rarely connate (Roseae);

ovules 1(or 2), collateral (Rubeae) or superposed (Fallugia, Filipendula).
Fruits

achenes or aggregated achenes sometimes with fleshy, urn-shaped hypanthium or enlarged torus, sometimes aggregated drupelets;

styles persistent or deciduous, not elongate (elongate but not plumose in Geum).
x

= 7(8).
2n

= 28.

Horkelia cuneata var. cuneata

Rosaceae subfam. rosoideae
Phenology Flowering spring–summer.
Habitat Coastal sand dunes and hills, coastal scrub communities
Elevation 0–400 m (0–1300 ft)
Distribution
from FNA
CA
[BONAP county map]
North America; Mexico; Central America; South America; West Indies; Bermuda; Eurasia; Africa; Atlantic Islands; Indian Ocean Islands; Pacific Islands; Australia
Discussion

Most extant populations of Horkelia cuneata are referable to var. cuneata or intermediates between it and the other two varieties, with the greatest concentrations around Monterey Bay and from Morro Bay to Santa Barbara. At its most distinctive, var. cuneata occurs from Santa Cruz to Los Angeles counties, often sharing habitat with var. sericea though also occurring somewhat more inland, but not as far inland as var. puberula. Although not as endangered as the extremes, unequivocal var. cuneata is far from abundant and shares some of the same threats to its prime coastal habitat.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Variation in the number of genera in subfam. Rosoideae is due to differences in generic delimitation between D. Potter et al. (2007) and the authors of some Potentilleae genera. Cyanogenic glycosides and sorbitol are absent in the subfamily.

Tribes 6, genera 28–35, species ca. 1600 (6 tribes, 26 genera, 302 species, including 1 hybrid, in the flora)

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 9, p. 255. FNA vol. 9, p. 23. Author: Luc Brouillet.
Parent taxa Rosaceae > subfam. Rosoideae > tribe Potentilleae > Horkelia > sect. Horkelia > Horkelia cuneata Rosaceae
Sibling taxa
H. cuneata var. puberula, H. cuneata var. sericea
Subordinate taxa
Synonyms Potentilla lindleyi var. lepida
Name authority unknown Arnott: Botany, 107. (1832)
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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