Aristolochia karwinskii Duch.
Descripción
Geophytic herb, procumbent, perennial subterranean organs not seen; stems with 2-3 subterranean internodes, not seen; aerial internodes, 1.2-2 cm long, sparsely covered with septate trichomes. Petioles terete, 0.4-0.7 x 0.02 cm, green, sometimes purplish red, sparsely covered with septate trichomes. Leaf blades deltoid, discolorous, base subcordate, apex acute, (0.7-)1.7-3.0 x (0.4-)1.2-3 cm; palmatinerved, actinodromous, margin entire; adaxial leaf side green, with septate trichomes with acroscopic orientation; abaxial leaf side pale green, with dense septate trichomes, especially along the veins. Flowers axillary, solitary peduncle 4-7 x 0.01-0.02 mm, with dense septate trichomes). Bract ovate, 1-2 x 0.7 cm. Perianth geniculate, 4-6(-8) cm long, brown-orange, becoming maroon toward the limb, veins brown-orange, with dense septate trichomes along the veins; utricle obovoid to ellipsoid,0.7-0.8 x 0.5-0.7 cm, internal surface, not seen; tube bent 90°, basally straight, widened toward the limb, 1.5-1.7 x 4-6 mm, internal surface, not seen; limb rhombic, obtuse at the base, acute at the apex, 2.5-3 x 1-2 cm, in lateral view flat; throat elliptic; syrinx, not seen. Gynostemium, stipe not seen, stigmatic lobes 5, anthers 5. Ovary inferior, oblanceolate, 10 x 2 mm, with dense septate trichomes. Fruit not seen.A
Floración
MayA
Ejemplar revisado
MEXICO. Tamaulipas: Mun. Bustamante, 3 km al N de La Joya de Herrera, 2000 m, 24 May 1976, F. González-Medrano 9111 (MEXU); 4 km al N de La Joya de Herrera, 2000m, 24 May 1976, F. González-Medrano 9122(MEXU).A
Elevación
<2000 mA
Ecología y Hábitat
This species is currently only known from Tamaulipas and its unclear type locality region which might be from Veracruz. It grows in rosette scrub, xerophytic scrub vegetation and is associated to limestone.A
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC