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Species
Hibiscus trionum
IUCN
NCBI
EOL Text
"Annual, erect or decumbent herbs, 30-60 cm high; stems simple and stellate-hairy. Leaves aletnate, lower ones ovate or orbicular, entire or lobed, ca 3.5 x 2-4 cm, upper leaves palmately 3-5 lobed; midlobe longer, 2.5-7.5 cm long; lobes oblong, pinnatisect, punctate, sparsely simple and stellate-hairy on both surfaces, sometimes nearly glabrous above; petioles ca 5 cm long, pubescent with simple and 2 or 3 brachiate stellate hairs; stipules subulate, 3-5 mm long, covered with long stiff hairs. Flower axillary, solitary; pedicel ca 4 cm long, jointed above middle, pubescent. Epicalyx lobes 8-12, linear, ca 10 x 15 mm, ciliate at margin, spreading upwards in fruit surrounding capsule. Calyx campanulate, inflated, covering capsule; lobes connate for about 1/3 down, broadly ovate, acute, 1-1.5 cm long, membranous, hispid with simple hairs on nerves inside, green eventually becoming purple, 4-6 nerved. Corolla 1-2.5 cm across, yellowish pink with a dark purple centre, hairy outside, glabrous inside; petals obovate, rounded at apex. Staminal column 5-8 mm long, glabrous, antheriferous above. Ovary ovoid, ca 4 mm long, densely hairy; styles 5, connate to middle. Capsules oblong, obtuse, 0.5-2 x 1-1.5 cm, hairy outside, shining inside, dehiscing longitudinally from tip; seeds reniform, ca 2 mm across, minutely tubercled or glabrate."
Annual herb, up to 1.5 m, often smaller. Leaves variable from nearly unlobed ovate or ovate hastate to deeply 3-5-lobed; lobes often pinnately incised again or with shallowly to deeply crenate-dentate margins. Flowers solitary, axillary, creamy-white, to pale yellow with a dark purple centre. Calyx with conspicuous purple veins, stellate hairy.
Habit: Erect or trailing herb
This member of the Mallow family has a distinctive appearance because of its deeply lobed leaves. Other mallows usually have leaves that are unlobed or shallowly lobed. The beautiful flowers are large, considering the small size of the plant, but they remain open for only a short time. Another common name for this species is Venice Mallow.
License | http://creativecommons.org/licenses/by-nc/3.0/ |
Rights holder/Author | Copyright © 2002-2014 by Dr. John Hilty |
Source | http://www.illinoiswildflowers.info/weeds/plants/hour_flower.htm |
Trionum annuum Medikus.
License | http://creativecommons.org/licenses/by-nc-sa/3.0/ |
Rights holder/Author | eFloras.org Copyright © Missouri Botanical Garden |
Source | http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=200013734 |
This plant is a summer annual that develops into a sprawling vine up to 1' tall. The stems are up to 2' in length, branching occasionally; they are round and hairy. The alternate leaves are up to 3" long and 2" across (excluding the petioles). They are deeply divided into 3 primary lobes. Each of these primary lobes is shallowly lobed, sometimes with a few large blunt teeth that are crenate or dentate along the margin. Among the primary lobes, the middle lobe is longer the side lobes. The hairy petiole is at least half as long as the leaf that it connects to the stem. From the axils of the leaves, there develops single flowers from hairy stalks. Each flower is about 2" across, consisting of 5 rounded petals that are white or pale yellow, a large calyx that is divided into 5 segments, a pistil with a divided style, and numerous stamens with golden yellow anthers. Each petal is purple at the base. The purple style is divided into 5 short stigmata with knobby tips. The segments of the calyx are pale green and membranous. Each calyx segment has several longitudinal nerves that are purple or green and hairy. At the base of each calyx, there are several spreading bracts that are slender. The blooming period occurs from mid-summer to early fall and lasts about 1-2 months. Each flower blooms during a single day that is sunny, and remains open for only a few hours. The oval seed capsule has 5 cells and is completed enclosed by the papery segments of the calyx. Each cell contains numerous seeds that are dull brown or grey, and kidney- or heart-shaped. The root system is fibrous. This plant spreads by reseeding itself.
License | http://creativecommons.org/licenses/by-nc/3.0/ |
Rights holder/Author | Copyright © 2002-2014 by Dr. John Hilty |
Source | http://www.illinoiswildflowers.info/weeds/plants/hour_flower.htm |
Degraded forests
Notes: Degraded forests
Weed of cultivation.
License | http://creativecommons.org/licenses/by-nc-sa/3.0/ |
Rights holder/Author | Bibliotheca Alexandrina, BA Cultnat, Bibliotheca Alexandrina - EOL Ar |
Source | http://lifedesk.bibalex.org/ba/pages/3153 |
Flowering class: Dicot Habit: Herb