Oenothera hartwegii subsp. filifolia
Oenothera hartwegii subsp. fendleri
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.
1–5 × 0.15–1 cm, fascicles of small leaves to 1 cm (when present);
blade linear to oblanceolate or lanceolate, base attenuate to obtuse, rarely nearly clasping, margins entire or subentire, rarely undulate.
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.
buds with free tips 0.5–3 mm;
floral tube 30–50 mm;
sepals 9–28 mm;
petals 10–30 mm;
filaments 5–12 mm, anthers 5–13 mm;
style 40–75 mm.
= 14.
= 14.
Oenothera hartwegii subsp. filifolia
Oenothera hartwegii subsp. fendleri
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.)
Subspecies fendleri is known from Barber, Comanche, and Morton counties, Kansas, south through western Oklahoma and scattered sites in the Texas Panhandle to eastern Chihuahua, central trans-Pecos Texas, central and western New Mexico, and east-central Arizona. It is the most distinctive subspecies in the complex.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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