Oenothera delessertiana Steud.
Oenothera speciosa Nutt. var. childsii (L.H. Bailey) Munz
Oenothera speciosa Nutt.
Pink evening primrose, showy evening primrose, Mexican primrose, amapola, pinkladies
Pink evening primrose is native to southwestern North America.
Plants: 6–24″ (15–60 cm) tall, with stems that are erect or slouching. One means of spreading is via root systems a foot underground, leading to clumps up to 6′ (1.8 m) around.
Leaves: Leaves are simple, toothed, and 1–3 ⨉ ¾″ (3–8 ⨉ 2 cm), on short petioles (stems). They are hairless, or slightly hairy, and oblanceolate to elliptic.
Flowers: Young flowers are white, usually maturing to an attractive pink color, in small clusters atop long stems. They have four petals in the shape of a bowl, yellow centers, 8 stamens, and a long white stigma branched into 4 sections at its tip. Flowers are 2–3½″ (5–8.9 cm) across. Flowers appear from May to July or later, depending upon the area.
Fruits: Narrow capsules ⅜–⅝″ (1.2–1.8 cm) long.
Habitats: Prairies, fields, meadows, and open woodlands.
Online References:
Hartmannia speciosa (Nutt.) Small
Oenothera delessertiana Steud.
Oenothera speciosa Nutt. var. childsii (L.H. Bailey) Munz
Oenothera delessertiana Steud.
Oenothera speciosa Nutt. var. childsii (L.H. Bailey) Munz
4/29/2018 · Red Spring Calico Basin, Red Rock Canyon, Nevada · ≈ 11 × 9″ (26 × 22 cm) 
4/29/2018 · Red Spring Calico Basin, Red Rock Canyon, Nevada · By Susan M. Kent · ≈ 10 × 9″ (24 × 22 cm) 
4/29/2018 · Red Spring Calico Basin, Red Rock Canyon, Nevada · By Susan M. Kent · ≈ 15 × 11″ (37 × 28 cm)
4/29/2018 · Red Spring Calico Basin, Red Rock Canyon, Nevada · By Susan M. Kent 
4/29/2018 · Red Spring Calico Basin, Red Rock Canyon, Nevada · ≈ 12 × 10″ (31 × 26 cm) 
4/29/2018 · Red Spring Calico Basin, Red Rock Canyon, Nevada · By Susan M. Kent 
| Kingdom | Plantae | Plants, but not fungi, lichens, or algae (from Stearn's Botanical Latin) |
| Subkingdom | Tracheobionta | Vascular plants—plants with a “circulatory system” for delivering water and nutrients |
| Division | Magnoliophyta | Flowering plants, also known as angiosperms |
| Class | Magnoliopsida | Dicotyledons—plants with two initial seed leaves |
| Subclass | Rosidae | Roses, legumes, proteas, dogwoods, hydrangeas, mistletoes, euphorbias, grapes, many more |
| Order | Myrtales | Includes myrtles, leadwoods, loosestrifes, pomegranates, evening primroses, many others |
| Family | Onagraceae | Willowherb/evening primrose family |
| Genus | Oenothera | Derivation uncertain: 1. Greek ονος θηρας (onos theras), or “donkey catcher.” 2. Or οινος θηρας (oinos theras), “wine seeker.” 3. Or Latin oenothera, “a plant whose juices may cause sleep” |
| Species | speciosa | Showy |
Oenothera speciosa description by Thomas H. Kent, not updated.
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