Flora of North America species comparison

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Chylismia cardiophylla subsp. cardiophylla

Chylismia cardiophylla
Photo is of parent taxon

heart leaf primrose

heart leaf primrose, heartleaf suncup
Habit Herbs villous, sometimes also glandular puberulent. Herbs annual or perennial, villous and glandular puberulent.
Stems

usually well branched, forming bushy habit, 20–100 cm.
Leaves

cauline, mostly toward base;

petiole (0.7–)2.5–7.5 cm;

blade cordate-ovate to -orbiculate, 2.5–7.5 × 2.3–5.5 cm, smaller distally, margins erose-dentate.
Racemes

nodding, congested.
Flowers

floral tube 4.5–12 mm;

petals 3–12 mm;

style 8–23 mm, stigma often exserted beyond anthers at anthesis.

floral tube 4.5–14 mm, villous inside;

sepals 3–9 mm;

petals yellow, 3–12 mm;

filaments 1–3 mm, anthers 2–4 mm;

style 8–23 mm, stigma surrounded by or exserted just beyond anthers at anthesis.
Capsules

ascending, cylindrical, 20–55 mm;

pedicel 1–18 mm.
Seeds

0.5–0.7 mm.
2n

= 14.

Chylismia cardiophylla subsp. cardiophylla

Chylismia cardiophylla
Phenology Flowering Mar–May.
Habitat Rocky walls, sandy alluvial flats, with Ambrosia dumosa, Hyptis emoryi, and Larrea tridentata.
Elevation 0–700 m. (0–2300 ft.)
Distribution
from FNA
AZ; CA; Mexico (Baja California, Sonora)
[BONAP county map]
sw United States; nw Mexico
[WildflowerSearch map]
[BONAP county map]
Discussion

Subspecies cardiophylla is known from southern San Bernardino County south to eastern San Diego County, California, and Yuma County (and possibly western Pinal County), Arizona, and south in northeastern and central Baja California, Mexico; it is also found on Isla Ángel de la Guarda, Isla San Esteban, Isla San Luis, Isla San Marcos, and Isla San Pedro Mártir in the Gulf of California. Isla San Esteban is the only locality for this subspecies in Sonora.

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

Subspecies 3 (2 in the flora).

P. H. Raven (1962, 1969) determined this species to be self-compatible, but primarily outcrossing. Subspecies cedrosensis (Greene) W. L. Wagner & Hoch, occurs in Baja California and adjacent Sonora, Mexico.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Key
1. Herbs villous, sometimes also glandular puberulent; floral tubes 4.5–12 mm.
subsp. cardiophylla
1. Herbs glandular puberulent throughout, often also sparsely villous; floral tubes 9–14 mm.
subsp. robusta
Source FNA vol. 10. FNA vol. 10.
Parent taxa Onagraceae > subfam. Onagroideae > tribe Onagreae > Chylismia > sect. Lignothera > Chylismia cardiophylla Onagraceae > subfam. Onagroideae > tribe Onagreae > Chylismia > sect. Lignothera
Sibling taxa
C. cardiophylla subsp. robusta
C. arenaria, C. atwoodii, C. brevipes, C. claviformis, C. confertiflora, C. eastwoodiae, C. exilis, C. heterochroma, C. megalantha, C. multijuga, C. munzii, C. parryi, C. scapoidea, C. specicola, C. walkeri
Subordinate taxa
C. cardiophylla subsp. cardiophylla, C. cardiophylla subsp. robusta
Synonyms Oenothera cardiophylla var. petiolaris Oenothera cardiophylla, Camissonia cardiophylla
Name authority unknown (Torrey) Small: Bull. Torrey Bot. Club 23: 193. (1896) — (as Chylisma)
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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