Oenothera stricta |
Oenothera coryi |
|
---|---|---|
Chilean evening primrose |
El Paso evening primrose |
|
Habit | Herbs acaulescent or caulescent, densely strigillose and glandular puberulent distally; from a taproot. | |
Stems | densely leafy, 4–20 cm. |
|
Leaves | in a basal rosette, sometimes also cauline, 5–16 × (0.2–)0.3–0.5(–0.7) cm; petiole 0.6–3.5 cm; blade linear to narrowly lanceolate, margins entire or sometimes proximal 1/2 of blade remotely lobed, apex long-attenuate, acute to rounded. |
|
Flowers | usually 1–3, rarely more, opening per day near sunset, weakly scented; buds with unequal free tips 0.7–1.2 mm; floral tube (55–)75–100(–125) mm; sepals 34–40 mm; petals lemon-yellow, fading orange, drying lavender to purple, broadly obovate, 35–43 mm, sometimes with terminal tooth; filaments 17–25 mm, anthers 14–17 mm; style (85–)105–135(–143) mm, stigma exserted beyond anthers at anthesis. |
|
Capsules | leathery, lanceoloid to ovoid, winged, wings 4–6 mm wide, body 25–30 × 8 mm, dehiscent 1/4–1/3 their length; pedicel 1–2(–3) mm. |
|
Seeds | numerous, usually in 2 distinct rows per locule, often reduced to 1 row near apex, rarely 1 row throughout, obovoid to subcuboid, 2.5–4 × 2.5–3.5 mm. |
|
2n | = 42. |
|
Oenothera stricta |
Oenothera coryi |
|
Phenology | Flowering Apr–May. | |
Habitat | Open grasslands, disturbed areas. | |
Elevation | 300–1000 m. (1000–3300 ft.) | |
Distribution |
South America [Introduced, California] |
TX |
Discussion | Subspecies 2 (1 in the flora). Oenothera stricta is a PTH species and forms a ring of 14 chromosomes in meiosis, and is self-compatible and autogamous (W. Dietrich 1977). Subspecies stricta is naturalized in many areas around the world and may be so in California. Subspecies altissima W. Dietrich occurs only in Argentina. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Oenothera coryi is known only from Baylor, Callahan, Knox, Nolan, Taylor, and Throckmorton counties in north-central Texas and Crosby and Garza counties in the Texas Panhandle. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 10. | FNA vol. 10. |
Parent taxa | Onagraceae > subfam. Onagroideae > tribe Onagreae > Oenothera > sect. Oenothera > subsect. Munzia > ser. Allochroa | Onagraceae > subfam. Onagroideae > tribe Onagreae > Oenothera > sect. Megapterium |
Sibling taxa | ||
Subordinate taxa | ||
Name authority | Ledebour ex Link: Enum. Hort. Berol. Alt. 1: 377. (1821) — (as striata) | W. L. Wagner: Ann. Missouri Bot. Gard. 73: 475. (1986) |
Web links |