Aristolochia buntingii Pfeifer
Descripción
Geophytic herb, procumbent, sub- terranean organs 25–35 cm long; stems slightly ribbed with 1–2 subterranean internodes, swollen nodes, 10 mm long; aerial internodes slightly geniculate, (3–)4–5cmlong,and sparsely covered with septate trichomes. Petioles terete, (0.7–)0.8–1 × 0.1–0.2 cm, green, sometimes pink-purple, sparsely covered with septate trichomes. Leaf blades ovate, discol- orous, base cordate, apex obtuse slightly acute, (4.0–)5.0–6.5(–8.0) × (3.2–)4.5–5.5(–6.8) cm; palmatinerved, actinodromous, in young leaves basal veins purple-pink, margin entire; adax- ial leaf side green, bullate, with sparse tomentose tufts and sparse septate trichomes, 0.7–1 mm long with acroscopic ori- entation; abaxial leaf side pale green, reticulate, veins pale yel- low with dense septate trichomes, especially along the veins. Flowers axillary, solitary, peduncle 9–15 × 0.4–0.6 mm. Bract lanceolate, 0.3–0.4 × 0.15–0.3 cm. Perianth geniculate, (1.1–)1.5–2cm long, pale yellow becoming purple toward the limb, veins brown-orange, sparse septate trichomes along the veins; utri- cle obloid, (0.37–)0.4–0.5 × (0.2–)0.3–0.5 cm, internal surface yellow with purple dots, covered with moniliform mucilagi- nous trichomes; tube bent 70°–90°, basally straight, widened toward the limb, 3–4(–9) × 1–2 mm, internal surface with white uniseriate trichomes, 0.4–0.3 mm long; limb obovate, slightly cordate at the base, apiculate at the apex, 0.7–2× (0.5–)0.7–1.25 cm, dark purple, covered with fimbriate tri- chomes, in lateral view cup-shaped; throat ovate, dark purple, covered by small white trichomes, 0.5 mm long; syrinxinfundibuliform, slightly eccentric, 2.7 mm long, 2.5 mm wide at the base and 0.8 mm wide at the apex. Gynostemium coroniform, stipitate, 4 × 2 mm, stipe 0.8–0.3 mm long, stig- matic lobes 5, 0.6 mm long, anthers 5, 0.7 mm long. Ovary inferior, lanceolate, 7–9 × 3.5–5 mm, with sparse septate tri- chomes. Fruit a capsule, purple when young, mature fruit not seen; seeds not seen.A
Fructificación
AugA
Floración
Aug–SepA
Ejemplar revisado
MEXICO. Michoacán: Mun. Arteaga, road to Arteaga near La Lagunita, 809 m, 1 Aug 2013, A. Paizanni Guillén et al. 113 (IEB).A
Elevación
750 – 800 mA
Ecología y Hábitat
This species is only known from the municipality of Arteaga in Michoacán (Fig. 3). It grows in oak forest on hillsides, formed by ferrous volcanic rocksA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Bibliografía
A. Paizanni Guillén, A., Santana-Michel, F. J., Ramírez Amezcua J.M., Wagner S.T., Müeller S., Montero-Castro, J. C., Wanke, S. & Samain, M.-S. 2016: Four New Species of Aristolochia subsection Pentandrae from Western Mexico ser. 41, 1: 128–141. – Systematic Botany. https://doi.org/10.1600/036364416X690651