Flora of North America species comparison

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Oenothera deltoides subsp. piperi
Photo is of parent taxon

Piper's desert lantern
Habit Herbs annual, usually villous, hairs relatively long, curly, especially distally and on buds, sometimes glabrous; from a taproot.
Stems

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

basal and cauline;

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

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

sepals 13–22(–27) mm;

petals 15–25(–30) mm.
Capsules

15–25(–30) × 3–5 mm.
2n

= 14.

Oenothera deltoides subsp. piperi
Phenology Flowering (Mar–)Jun–Jul(–Sep).
Habitat Sandy soil or dunes in Great Basin Desert with Artemisia, Ericameria, or Sarcobatus.
Elevation 900–1900 m. (3000–6200 ft.)
Distribution
from FNA
CA; NV; OR
[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.)
Source FNA vol. 10.
Parent taxa 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
Synonyms O. deltoides var. piperi, O. trichocalyx var. piperi
Name authority (Munz) W. M. Klein: Aliso 5: 180. (1962)
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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