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Acad. Sci. 15: 5 (1925). Holotype: Panama, Standley 29906 (US). Pubescent shrubs; pseudostipules absent, Leaves 10-23 Ă— 5-12 cm, elliptic to ovate, green above, silvery-pubescent below, the apex acute to acuminate, the base attenuate; petioles to 1 cm. Flowers in bracteate thyrses borne on old wood or from the base of the stem; pedicel and ovary 3-6 cm; calyx to 5 cm, reddish-purple, strongly bent, the limb unequally 3-lobed, the midlobe lowermost, broadly triangulate, with a yellow boss below the mouth; gynostemium 3-lobed, subsessile.

Flora Mesoamericana, Volume 2 (2), Aristolochiaceae, page 2 of 14 2. Calyx straight; Stems twining; petiols 2-5 cm. 27. A. pentandra 2. Calyx bent; stems procumbent; petioles 1-2 cm. 3. Calyx limb acute; gynostemium stalked. 29. A. variifolia 3. Calyx limb with a linear appendage; gynostemium subsessile. 28. A. nelsonii 1. Shrubs or twining lianas; gynostemium 3- or 6-lobed; ovary and capsule 3 or 6loculate. 4. Calyx limb 3-lobed. 5. Calyx limb with linear, pendent lobes. 6. 1. A. tricaudata 6.

BibliografĂ­a: Gabrielian, E. y Chandjian, N. Novosti Syst. Vyssh. Rast. 23: 206-217 (1986). A. Proc. Calif. Acad. Sci. ser. , 25: 421-468 (1946). -R. en. Advances in Compositae Systematics: Compositae Systematics, Biology, Utilization 255281 (1995). M. Fl. N. Amer. 19: 503-534 (2006). 1. Receptacles pilose. 1. A. absinthium 1. Receptacles glabrous. 2. Leaf bases without lobules, lobes not dentate. 2. A. ludoviciana 2. Leaf bases with 1-2 pairs of lobules, lobes dentate. 3. A. vulgaris Flora Mesoamericana, Volume 5 (2), Asteraceaeae, page 12 of 286.

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Actinidiaceae


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