Flora of North America species comparison

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Oenothera deltoides subsp. piperi

Oenothera deltoides subsp. deltoides
Photo is of parent taxon

Piper's desert lantern
Photo is of parent taxon

birdcage evening primrose, desert lantern
Habit Herbs annual, usually villous, hairs relatively long, curly, especially distally and on buds, sometimes glabrous; from a taproot. Herbs annual, strigillose, sometimes also villous; from a taproot.
Stems

central stem thickened proximally, unbranched or with several lateral, ascending to decumbent branches, 3–30(–40) cm.

central stem erect, usually thickened, with several leafy, ascending, slender branches from near base, encircling stems in older plants, 20–60(–100) cm.
Leaves

basal and cauline;

blade rhombic, becoming lanceolate distally, margins deeply sinuate-dentate to pinnatifid.

basal and cauline;

blade rhombic-lanceolate, becoming oblanceolate to lanceolate distally, margins usually coarsely sinuate-dentate to subentire, rarely pinnatifid.
Flowers

buds fluted or strongly quadrangular in distal 1/2, without free tips;

sepals 13–22(–27) mm;

petals 15–25(–30) mm.

buds weakly quadrangular, with free tips 0–1.5 mm;

sepals 20–35 mm;

petals 18–44 mm.
Capsules

15–25(–30) × 3–5 mm.

40–80 × 2–3.5 mm.
2n

= 14.

= 14.

Oenothera deltoides subsp. piperi

Oenothera deltoides subsp. deltoides
Phenology Flowering (Mar–)Jun–Jul(–Sep). Flowering (Mar–)Jun–Jul(–Sep).
Habitat Sandy soil or dunes in Great Basin Desert with Artemisia, Ericameria, or Sarcobatus. Sandy places, dunes, Mojave and Sonoran deserts.
Elevation 900–1900 m. (3000–6200 ft.) -50–1300 m. (-200–4300 ft.)
Distribution
from FNA
CA; NV; OR
[BONAP county map]
from FNA
AZ; CA; NV; Mexico (Baja California, Sonora)
[BONAP county map]
Discussion

W. M. Klein (1964) determined subsp. piperi to be self-incompatible. It occurs in the northern part of the range of O. deltoides, from northeastern California to southern Oregon and the western half of Nevada.

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

W. M. Klein (1964) determined most populations of subsp. deltoides that were studied to be self-incompatible, but found a few in Riverside County, California, to be self-compatible. Oenothera kleinii was described from a single, small roadside population near Wolf Creek Pass in Colorado. Subsequent study and discussion with W. A. Weber suggested that this population was not native to the location, but grew there accidently; it has not been collected again in Colorado. Further study of morphological diversity of O. deltoides has shown that the distinguishing characters mentioned when O. kleinii was described, such as longer hairs and larger capsules and seeds, do in fact occur in plants within the natural range of O. deltoides.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 10. FNA vol. 10.
Parent taxa Onagraceae > subfam. Onagroideae > tribe Onagreae > Oenothera > sect. Anogra > Oenothera deltoides Onagraceae > subfam. Onagroideae > tribe Onagreae > Oenothera > sect. Anogra > Oenothera deltoides
Sibling taxa
O. deltoides subsp. ambigua, O. deltoides subsp. cognata, O. deltoides subsp. deltoides, O. deltoides subsp. howellii
O. deltoides subsp. ambigua, O. deltoides subsp. cognata, O. deltoides subsp. howellii, O. deltoides subsp. piperi
Synonyms O. deltoides var. piperi, O. trichocalyx var. piperi O. deltoides var. cineracea, O. kleinii, O. trichocalyx var. cineracea
Name authority (Munz) W. M. Klein: Aliso 5: 180. (1962) 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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