Aristolochia flexuosa Duch.
Descripción
Geophytic herb, climbing to procumbent, perennial subterranean organs 15-20 x 0.6-0.8 cm, stems with 1-2 subterranean internodes, swollen nodes, 5-15 mm long; aerial internodes (4-) 6.5-10 (-11.5) cm long, sparsely covered with septate trichomes, purple- pink. Petioles terete (0.2-) 0.6-1.2 x 0.2-0.4 mm, pink-purple, sparsely covered with septate trichomes. Leaf blades elliptic to ovate, discolorous, base cordate, apex acuminate, (2.0-)4.5-9 (-13) x (1-) 3-4.5(-5.5) cm, palmatinerved actinodromous, basal veins pink-purple, margin entire; adaxial leaf side green with septate trichomes, 0.7-1 mm long, sparse and with acroscopic orientation; abaxial leaf side pale green. Flowers axillary, solitary growing in the apical part, peduncles 0.5-1 x 0.3-0.4 mm. Bract lanceolate, 1-1.5 x 0.2-0.3 cm. Perianth geniculate, 3-4 cm long, green-yellowish veins brown-orange, with dense septate trichomes along the veins; utricle, elliptic gibbous (0.5-) 6 x 0.4-0.5 cm, inside surface yellow with purple dots, covered with moniliform mucilaginous trichomes; tube slightly bent 40°, basally straight, 7 x 2-4 mm, internal surface with short setose trichomes; limb oblong, cleft at the base, retuse at the apex, 2- 4 x 0.6-0.7 cm; bent 90° respect the tube and utricle, base yellow-green with striate brown lines toward the apex and a marginally ringed yellow green, in lateral view flat; throat elliptic, dark-purple, covered by white septate trichomes around; syrinx infundibuliform, eccentric, 1.5 mm long, 4 mm wide at base and 1.5 mm wide at apex. Gynostemium coroniform, stipitate, 2.5 x 2.5 mm wide; stipe 0.5-1 mm long, stigmatic lobes 5, 0.5-1 mm long, anthers 5, 1- 1.5 mm long. Ovary inferior, lanceolate 7-10 x 1.6-2.5 mm, with sparse to dense septate trichomes. Fruit a capsule, obloid to ellipsoid, 1.5 x 0.7-0.9 cm wide, green when young, brown yellow when mature, with septicidal dehiscence at the apex. Seeds deltoid, 3.5-4 x 3-4.5 mm wide, upper part black, lower part yellow-brown, with granular surface.A
Floración
OctA
Ejemplar revisado
MEXICO. Michoacán: Mun. Uruapan, del poblado de Jucutacato pasando la cascada de la Tzaráracua por el camino que va hacia la Tzararacuita, 19°20´58.08″ N, 102°4´48.16″ W, 1,435 m, 31 August 2013, A. Paizanni Guillén & J. M. Ramírez-Amezcua 118 (IEB); Desde el poblado Jucutacato, rumbo a la cascada de la Tzararácua 19°21´01.9″ N, 102°04´43.9″ W, 1,451 m, 5 July 2014, A. Paizanni Guillén et al. 194 (IEB), Desde el poblado Jucuctacato, rumbo a la cascada de la Tzararácuita (Topotipo), 19°21´01.7″ N, 102°04´48.31″ W, 441 m, 5 October 2014, A. Paizanni Guillén & J.M. Ramírez Amezcua 297 (IEB).A
Elevación
1300 – 1500 mA
Ecología y Hábitat
Aristolochia flexuosa is known from the municipalities of Apatzingán, Uruapan and Ziracuaretiro in the state of Michoacán, it grows in canyons of
disturbed pine-oak forest as well as forest with tropical elements in humid canyons with Pinus, Bursera Acacia, Quercus, Boconia, Ficus cotinifolia. A
disturbed pine-oak forest as well as forest with tropical elements in humid canyons with Pinus, Bursera Acacia, Quercus, Boconia, Ficus cotinifolia. A
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Aristolochia flexuosa is easily to recognize by his limb oblong, cleft at the base, retuse at the apex; bent 90° respect the tube and utricle, base yellow-green
with striate brown lines toward the apex and a marginally ringed yellow green and the throat elliptic, dark-purple. A
with striate brown lines toward the apex and a marginally ringed yellow green and the throat elliptic, dark-purple. A