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big heartleaf sun cup

Habit Herbs glandular puberulent throughout, often also sparsely villous.
Leaves

stipules present or absent.

Flowers

floral tube 9–14 mm;

petals 7–11 mm;

style 14–20 mm, stigma usually exserted beyond anthers at anthesis.

floral tube present or, rarely, absent;

sepals 2 or 4 (very rarely 3), deciduous with floral tube, petals, and stamens;

petals yellow, white, pink, red, rarely in combination.

xI> = 7, 10, 11, 15, 18.

2n

= 14.

Chylismia cardiophylla subsp. robusta

Onagraceae subfam. onagroideae

Phenology Flowering Mar–May.
Habitat Rocky borders of washes and hillsides, with Ambrosia dumosa and Larrea tridentata.
Elevation 600–1400 m. (2000–4600 ft.)
Distribution
from FNA
CA
[BONAP county map]
North America; Mexico; Central America; South America; West Indies; Eurasia; Pacific Islands (New Zealand, Society Islands); Australia
Discussion

Subspecies robusta is known from the western and southern margins of Death Valley, Inyo County.

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

Genera 21, species 582 (16 genera, 246 species in the flora).

Onagroideae encompass the main lineage of the family, after the early branching of Ludwigia (R. A. Levin et al. 2003, 2004). This large and diverse lineage is distinguished by the presence of a floral tube beyond the apex of the ovary; sepals deciduous with the floral tube, petals, and stamens; pollen shed in monads (or tetrads in Chylismia sect. Lignothera and all but one species of Epilobium); ovular vascular system exclusively transseptal (R. H. Eyde 1981); ovule archesporium multicellular (H. Tobe and P. H. Raven 1996); and change in base chromosome number from x = 8 in Ludwigia to x = 10 or x = 11 at the base of Onagroideae (Raven 1979; Levin et al. 2003). Molecular work (Levin et al. 2003, 2004) substantially supports the traditional tribal classification (P. A. Munz 1965; Raven 1979, 1988); tribes are recognized to delimit major branches within the phylogeny of Onagroideae, where the branches comprise strongly supported monophyletic groups of one or more genera.

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

Source FNA vol. 10. FNA vol. 10.
Parent taxa Onagraceae > subfam. Onagroideae > tribe Onagreae > Chylismia > sect. Lignothera > Chylismia cardiophylla Onagraceae
Sibling taxa
C. cardiophylla subsp. cardiophylla
Subordinate taxa
Synonyms Oenothera cardiophylla subsp. robusta, Camissonia cardiophylla subsp. robusta
Name authority (P. H. Raven) W. L. Wagner & Hoch: Syst. Bot. Monogr. 83: 206. (2007) W. L. Wagner & Hoch: Syst. Bot. Monogr. 83: 41. (2007)
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