Flora of the Hawaiian Islands
Literature for Oenothera stricta subsp. stricta
Dietrich, 1977. Literature for Oenothera stricta
Dietrich, 1977. Literature for Oenothera stricta subsp. altissima
Dietrich, 1977. Literature for Oenothera stricta subsp. argentinae
Dietrich, 1977.
   Onagraceae -- The Evening Primrose Family Bibliography
      Oenothera stricta
General Information
DistributionIn Chile from the province of Coquimbo to Isla Chiloe. On the east side of the Andes in the following provinces of Argentina: Neuquen, Rio Negro and Chubut, and in the provinces of Chaco, Cordoba, San Luis, and Buenos Aires. The localities for subsp. stricta in Ecuador (Quito) and Peru (Lima) must represent stations where the plant is adventive, as is often the case on other continents.
Erect annual or perhaps sometimes biennial herb, rarely decumbent or nearly prostrate, forming a rosette, unbranched or with a branched main stem and side branches arising obliquely or arching upward from the rosette, 3.5-15 dm tall. Plant ┬▒strigillose, especially below, and densely to sparsely long- and shortvillous as well as glandular-pubescent.
Leaves cauline and in a rosette, rosette leaves narrowly elliptic to oblanceolate, acute, gradually narrowed to the petiole or sessile and narrowly cuneate to acute at the base, 10-25 cm long, 0.8-2.5 cm wide; cauline leaves very narrowly elliptic to lanceolate, acute, acute to rounded at the base, sessile, 6-18 cm long, 0.6-2.5 cm wide; bracts narrowly lanceolate to ovate, acute, sessile, truncate to subcordate at the base, 2-3.5 cm long, 0.7-1.5 cm wide, mostly shorter than the capsules they subtend, rarely subequal to them; leaves plane or slightly undulate at the margins, remotely or densely serrate, the teeth blunt or sharp; margins of the bracts usually reddish.
Inflorescence simple or branched, floral tube 2-4.5 cm long, buds narrowly oblong to oblong or lanceolate in outline, green or yellowish green, often flushed with red, 1.2-3 cm long, 0.3-1 cm wide, apices of the sepals erect or divergent, 1-3 mm long, petals broadly obovate to very broadly obovate, often with a red spot at the base of each one, 1.5-3.5 cm long, anthers 5-11 mm long, filaments 10-20 mm long, style short, the anthers shedding pollen directly on the stigma at anthesis, 2.8-6 cm long, stigma lobes 3-6 mm long, ovary 1.3-2 cm long.
Capsule 30-50 mm long, 3-4 mm thick.
Seeds broadly elliptic in outline, 1.3-1.8 mm long, 0.5-0.7 mm thick.
Gametic chromosome number, n = 7 (ring of 14 at meiotic metaphase I).
FNA, Self-compatible, usually autogamous, permanent translocationheterozygote.