Flora of North America species comparison

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Oenothera deltoides subsp. cognata
Photo is of parent taxon

desert lantern
Habit Herbs short-lived perennial, sometimes annual, glabrous or sparsely villous, rarely also strigillose; from a taproot.
Stems

central stem often thickened near base, branched from base, branches ascending, not encircling stems in older plants, 20–40 cm.
Leaves

basal and cauline;

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

buds weakly quadrangular, without free tips;

sepals 20–35 mm;

petals 25–40 mm.
Capsules

40–60 × 3–5 mm.
2n

= 14.

Oenothera deltoides subsp. cognata
Phenology Flowering (Mar–)Jun–Jul(–Sep).
Habitat Sandy places.
Elevation 30–500 m. (100–1600 ft.)
Distribution
from FNA
CA
[BONAP county map]
Discussion

W. M. Klein (1964) determined subsp. cognata to be self-compatible. It is known from the San Joaquin Valley. Some specimens from Contra Costa County at the northern edge of the range of subsp. cognata appear to be somewhat intermediate toward subsp. howelliiin having minute free sepal tips in bud and the plant is more pubescent.

(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. deltoides, O. deltoides subsp. howellii, O. deltoides subsp. piperi
Synonyms O. trichocalyx var. cognata, O. deltoides var. cognata
Name authority (Jepson) 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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