Flora of North America species comparison

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Chylismia cardiophylla

Chylismia cardiophylla subsp. cardiophylla

heart leaf primrose, heartleaf suncup
Photo is of parent taxon

heart leaf primrose
Habit Herbs annual or perennial, villous and glandular puberulent. Herbs villous, sometimes also 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 4.5–14 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.

floral tube 4.5–12 mm;

petals 3–12 mm;

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

ascending, cylindrical, 20–55 mm;

pedicel 1–18 mm.

Seeds

0.5–0.7 mm.

2n

= 14.

Chylismia cardiophylla

Chylismia cardiophylla subsp. 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
sw United States; nw Mexico
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; CA; Mexico (Baja California, Sonora)
[BONAP county map]
Discussion

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.)

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.)
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 Onagraceae > subfam. Onagroideae > tribe Onagreae > Chylismia > sect. Lignothera > Chylismia cardiophylla
Sibling taxa
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
C. cardiophylla subsp. robusta
Subordinate taxa
C. cardiophylla subsp. cardiophylla, C. cardiophylla subsp. robusta
Synonyms Oenothera cardiophylla, Camissonia cardiophylla Oenothera cardiophylla var. petiolaris
Name authority (Torrey) Small: Bull. Torrey Bot. Club 23: 193. (1896) — (as Chylisma) unknown
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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