Triumfetta columnaris Hochr.
Descripción
Shrubs about 2 m. high; older branches glabrescent, longitudinally ridged, the younger ones and inflorescence axes scurfy, with long spreading stellate and simple hairs. Leaves broadly ovate to obscurely 3-lobed, usually small, 6-8 cm. long and 3-4 cm. wide, rounded or subcordate at the base, gradually and narrowly long- acuminate, both surfaces lightly stellate-pubescent, slightly more so on the veins; petioles relatively stout, about 2-3 mm. long, coarsely long stellate-pubescent. Inflorescences axillary, the cymes of 2 cymules, usually opposite the bracts, the flowering peduncles 4-6 mm. long, the pedicels 3-5 mm. long. Flowers hermaphrodite, the buds broadly oblongoid, 22-25 mm. long and about 3 mm. wide slightly before anthesis, the apical appendages slender, 1-2 mm. long, glabrescent; sepals oblong, about 25 mm. long including the apical appendages, glabrescent and brownish without, light yellow within; petals narrowly obovate, about 18 mm. long and 3-4 mm. wide, the claw 4-5 mm. wide, densely but briefly ciliate; gonophore large, about 2 mm. long and 1 mm. wide, the glands oblong; urceolus about 0.5 mm. high, 5-lobed, briefly ciliate; stamens 20, the filaments smooth, long stellate-pubescent at the base; ovary orbicular, about 2 mm. long, the spines numerous, recurved, the stigma very briefly 3-parted. Fruit orbicular, the body about 6 mm. in diameter at maturity, lightly stellate-pubescent, 3-loculate, each 1- seeded, the spines about 75-100, each 1-2 mm. long, lightly pubescent to nearly glabrate, the gonophore and glands prominent; seeds ovoid, about 2.5 mm. long and 1.5-2.0 mm. wide.A
Distribución
México (país) EndémicoA
Elevación
1500 – 2500 mA
Tipo de vegetación
Bosque de encinoA
Categoría IUCN
No incluidaB
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