Flora of North America species comparison

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Oenothera falfurriae

royal evening primrose
Habit Herbs annual, moderately to sparsely strigillose and villous, sometimes glandular puberulent distally.
Stems

erect to ascending, usually unbranched, 10–40 cm.
Leaves

in a basal rosette and cauline, basal 5–12 ×1.3–3.5 cm, cauline 2–8.5 ×1–3 cm;

blade green, narrowly oblanceolate to narrowly elliptic or narrowly lanceolate, margins usually dentate to pinnatifid, sometimes subentire;

bracts spreading, flat.
Flowers

usually 1 opening per day near sunset;

buds erect, with free tips erect, 0.5–2 mm;

floral tube 25–40 mm;

sepals 10–22 mm;

petals yellow, fading orange or reddish tinged, broadly obovate or shallowly obcordate, 13–25 mm;

filaments 10–17 mm, anthers 4–5 mm, pollen 85–100% fertile;

style 35–50 mm, stigma slightly exserted beyond anthers at anthesis.
Capsules

cylindrical, sometimes slightly enlarged toward apex, 20–45 × 2–2.5 mm.
Seeds

ellipsoid, 0.8–1.4 × 0.3–0.6 mm.
2n

= 14.

Oenothera falfurriae
Phenology Flowering Apr–Aug.
Habitat Open, sandy sites.
Elevation 0–300 m. (0–1000 ft.)
Distribution
from FNA
TX
[BONAP county map]
Discussion

Oenothera falfurriae is known only from southeastern Texas (Aransas, Brazos, Brooks, Cameron, Frio, Harris, Hidalgo, Jim Hogg, Jim Wells, Kenedy, Kleberg, Maverick, Nueces, Refugio, Starr, Val Verde, Victoria, Webb, Willacy, Wilson, and Zapata counties). It is self-compatible and autogamous, but not a PTH species.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 10.
Parent taxa Onagraceae > subfam. Onagroideae > tribe Onagreae > Oenothera > sect. Oenothera > subsect. Raimannia
Sibling taxa
O. acutissima, O. albicaulis, O. argillicola, O. arida, O. arizonica, O. biennis, O. boquillensis, O. brachycarpa, O. calcicola, O. californica, O. canescens, O. capillifolia, O. cavernae, O. cespitosa, O. cinerea, O. clelandii, O. coloradensis, O. cordata, O. coronopifolia, O. coryi, O. curtiflora, O. curtissii, O. deltoides, O. demareei, O. dodgeniana, O. drummondii, O. elata, O. engelmannii, O. filiformis, O. filipes, O. flava, O. fruticosa, O. gaura, O. gayleana, O. glaucifolia, O. glazioviana, O. grandiflora, O. grandis, O. harringtonii, O. hartwegii, O. havardii, O. heterophylla, O. hispida, O. howardii, O. humifusa, O. jamesii, O. kunthiana, O. laciniata, O. lavandulifolia, O. lindheimeri, O. linifolia, O. longissima, O. macrocarpa, O. mckelveyae, O. mexicana, O. nealleyi, O. neomexicana, O. nutans, O. nuttallii, O. oakesiana, O. organensis, O. pallida, O. parviflora, O. patriciae, O. perennis, O. pilosella, O. platanorum, O. podocarpa, O. primiveris, O. psammophila, O. pubescens, O. rhombipetala, O. riparia, O. rosea, O. serrulata, O. sessilis, O. simulans, O. sinuosa, O. spachiana, O. speciosa, O. stricta, O. suffrutescens, O. suffulta, O. tetraptera, O. texensis, O. toumeyi, O. triangulata, O. triloba, O. tubicula, O. villosa, O. wolfii, O. xylocarpa
Name authority W. Dietrich & W. L. Wagner: Ann. Missouri Bot. Gard. 74: 149. (1987)
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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