Triumfetta semitriloba Jacq.
Descripción
Shrubs 1-2 m. high; older branches terete, glabrescent, the bark reddish, prominently lenticellate, the younger ones and inflorescence axes rough, slender, scurfy, with short, coarse, stellate tomentum. Leaves generally broadly ovate to 3 -lobate, the shape and size extremely variable even on the same plant, usually about 6-8 cm. long and 4-6 cm. wide, the base either cuneate or rounded, very rarely sub- cordate, the terminal lobe long-acuminate, the laterals usually blunt, but some- times all 3 lobes narrowly and gradually acuminate, the serrations extremely irregular, usually glandular, both surfaces rather densely and coarsely stellate- pubescent; petioles 3-6 cm. long, slender, scurfy with short, separate tufts of stellate hairs. Inflorescences axillary, rarely terminal, the cymes of 2-3 cymules in the axils of the bracts, the bracts narrowly elliptical, very rarely obscurely 3- lobed, the flowering peduncles 2-3 mm. long, the pedicels about 3 mm. long. Flowers hermaphrodite, the buds narrowly oblongoid, about 5-8 mm. long slightly before anthesis, the apical appendages 1-2 mm. long, lightly stellate-pubescent; sepals elliptical, 6-10 mm. long including the apical appendages, greenish and rather lightly stellate-pubescent without, yellow-brown and glabrescent within; petals elliptical to narrowly obovate, subequalling the sepals, the claw 2-3 mm. long, rather densely plumose; gonophore about 0.75 mm. long, rather slender, the glands oblong, about half as long as or subequalling the gonophore; urceolus rather short, 0.25-0.50 mm. high, densely ciliate; stamens 15-25, the filaments glabrous, retrorsely 4-serrate; ovary ovoid, about 1 mm. long, the spinules numerous, re- curved, the style 6-8 mm. long, the stigma usually acute, very rarely 3-parted. Fruit orbicular, the body 3-5 mm. in diameter at maturity, lightly to rather densely stellate-pubescent, 3-loculate, each cell 2-seeded, though very rarely all the 6 seeds maturing, the spines 50-75, 2-3 mm. long, slender, retrorsely pilosulose at the base from half to three-quarters of its length; seeds pyriform, about 2 mm. long and wide, the funicular groove prominent.A
Distribución
México (país) Nativo y no endémicoA
Elevación
0 – 2000 mA
Ecología y Hábitat
mm. long and wide, the funicular groove prominent. A common weed of the tropics, which finds its habitat usually in abandoned fields or cut-over forest areas, and in general being a nuisance to both man and his animals. It is found principally in the warmer regions of the New World, and less abundantly in tropical Africa. Flowers and fruits in its northern range from October to March, in its central range from December to May, and in its southern range from March to July.A
Tipo de vegetación
No especificadoA
Categoría IUCN
Preocupación menor (LC)B
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Bibliografía
A. Lay, K. K. 1950: The American species of Triumfetta L. – Ann. Missouri Bot. Gard. 37(3): 315–395. https://doi.org/10.2307/2394513