Flora of North America species comparison

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Oenothera hartwegii subsp. filifolia
Photo is of parent taxon
Habit Herbs glandular puberulent throughout, more densely so on distal parts, sometimes also sparsely strigillose on ovaries and leaves.
Leaves

0.3–4 × 0.04–0.3(–0.4) cm, fascicles of small leaves to 1.5 cm often present in axils;

blade filiform to narrowly lanceolate, base attenuate, margins entire or remotely serrulate, sometimes undulate.
Flowers

buds with free tips 0.5–4 mm;

floral tube 16–50 mm;

sepals 7–17 mm;

petals 12–23 mm;

filaments 6–13 mm, anthers 6–11 mm;

style 26–60 mm.
2n

= 14.

Oenothera hartwegii subsp. filifolia
Phenology Flowering May–Oct.
Habitat Highly local, often abundant, almost always on semiarid gypsum flats, dunes, or outcrops, with Juniperus, Larrea, and Yucca.
Elevation 600–1900 m. (2000–6200 ft.)
Distribution
from FNA
NM; TX; Mexico (Chihuahua, Coahuila, Zacatecas)
[BONAP county map]
Discussion

Subspecies filifolia occurs in Otero and Torrance counties in southeastern New Mexico, south and east through the Trans-Pecos and southern Panhandle of Texas to Cottle County in Texas, and southward from widely scattered localities in central Chihuahua, Coahuila, and Zacatecas, Mexico.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 10.
Parent taxa Onagraceae > subfam. Onagroideae > tribe Onagreae > Oenothera > sect. Calylophus > subsect. Salpingia > Oenothera hartwegii
Sibling taxa
O. hartwegii subsp. fendleri, O. hartwegii subsp. hartwegii, O. hartwegii subsp. maccartii, O. hartwegii subsp. pubescens
Synonyms O. tubicula var. filifolia, Calylophus hartwegii subsp. filifolius, C. hartwegii var. filifolius, Galpinsia filifolia, O. filifolia, O. hartwegii var. filifolia
Name authority (Eastwood) W. L. Wagner & Hoch: Syst. Bot. Monogr. 83: 212. (2007)
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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