Oenothera capillifolia |
Oenothera toumeyi |
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Habit | Herbs perennial (short-lived or, sometimes, suffrutescent) or annual, glabrous or strigillose; from a stout taproot. | Herbs perennial or sometimes annual, glabrate to strigillose throughout; from a stout taproot. | ||||
Stems | 1–many, weakly decumbent to ascending or erect, unbranched to moderately branched, (10–)25–80 cm. |
1–several, ascending to erect, unbranched to densely branched, 15–70 cm. |
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Leaves | 1–9 × (0.1–)0.3–1 cm, sometimes fascicles of small leaves to 2 cm present in non-flowering axils; petiole 0–0.6 cm; blade linear to narrowly lanceolate or oblanceolate, often folded lengthwise, usually not much reduced distally, proximalmost leaves sometimes spatulate, base attenuate, margins subentire or serrulate or spinulose-serrate, apex acute. |
1–3.5 × 0.1–0.7 cm, fascicles of small leaves 0.2–2.5 cm present in non-flowering axils; petiole 0 cm; blade narrowly lanceolate, base acute-attenuate, margins entire or obscurely and sparsely serrulate, not undulate, apex acute. |
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Flowers | opening at sunrise; buds with free tips 0–4 mm; floral tube 5–20 mm; sepals 4–12 mm, midribs keeled; petals yellow, fading orangish to purplish, 6–25 mm; antisepalous filaments 2–8 mm, antipetalous filaments 1–4 mm, anthers 2–7 mm, pollen 90–100% fertile; style 9–30 mm, stigma sometimes blue-black, discoid to quadrangular, exserted beyond anthers. |
usually 1 per stem opening per day at sunset; buds with free tips 2–9(–12) mm; floral tube (15–)30–60(–70) mm, funnelform in distal 1/2 or less; sepals 10–25 mm; petals yellow, fading pale pink or pale purple, 10–20 mm; filaments 4–12 mm, anthers 6–10 mm, pollen 85–100% fertile; style 35–70(–80) mm, stigma yellow, quadrangular, usually exserted beyond anthers. |
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Capsules | 10–35 × 1–2 mm, hard, dehiscent 1/2 their length, often tardily dehiscent throughout their length. |
10–50 × 1.5–4 mm, somewhat papery, promptly dehiscent in distal 1/2. |
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Seeds | obovoid, 1–1.8 mm, sharply angled, apex truncate. |
obovoid, 2–3 mm. |
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2n | = 14. |
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Oenothera capillifolia |
Oenothera toumeyi |
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Phenology | Flowering (May–)Jul–Oct. | |||||
Habitat | Local and uncommon on shaded, rocky slopes or disturbed areas, pine-oak forests. | |||||
Elevation | 1500–2600 m. (4900–8500 ft.) | |||||
Distribution | c United States; sc United States; n Mexico |
AZ; NM; Mexico (Chihuahua, Sonora) |
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Discussion | Subspecies 2 (2 in the flora). Oenothera capillifolia is self-incompatible (H. F. Towner 1977). Oenothera berlandieri (Spach) Steudel 1841, not D. Dietrich 1840, is superfluous and cannot be used in Oenothera when transferred from Calylophus, and pertains here. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Oenothera toumeyi occurs locally from the Chiricahua, Huachuca, and Santa Rita mountains in Cochise and Santa Cruz counties, Arizona, and the Mogollon Mountains in southern Catron County, New Mexico, south through northeastern Sonora in the Sierra Madre Occidental to west-central Chihuahua. H. F. Towner (1977) found that O. toumeyi is self-incompatible and vespertine. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 10. | FNA vol. 10. | ||||
Parent taxa | Onagraceae > subfam. Onagroideae > tribe Onagreae > Oenothera > sect. Calylophus > subsect. Calylophus | Onagraceae > subfam. Onagroideae > tribe Onagreae > Oenothera > sect. Calylophus > subsect. Salpingia | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Meriolix capillifolia | Galpinsia toumeyi, Calylophus hartwegii subsp. toumeyi, C. hartwegii var. toumeyi, C. toumeyi, O. hartwegii var. toumeyi | ||||
Name authority | Scheele: Linnaea 21: 576. (1848) | (Small) Tidestrom: Proc. Biol. Soc. Wash. 48: 41. (1935) | ||||
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