Origin and Habitat: Mountains of the Argentine Patagonia, from the north of Neuquén to Rio Negro, and bordering regions of Chile.
Altitude range: From 1000 to 2300 metres above sea level, according to the latitude.
Habitat and ecology: Diplolepis nummulariifoliaSN|34789]]SN|34789]] var. biflora grows in rock crevices in the shelter of rocks and in high altitude rocky outcrops. It blooms at the beginning of summer.

• Diplolepis nummulariifolia var. biflora (Phil.) Hechem & C.Ezcurra
• Cynanchum nummulariaefolium var. biflorum (Phil.) Reiche
• Cynoctonum biflorum Phil.
• Diplolepis biflora (Phil.) Hechem & C.Ezcurra
• Vincetoxicum biflorum (Phil.) Kuntze

• Diplolepis nummulariifolia (Hook. & Arn.) Liede & Rapini
• Cynanchum nummulariifolium Hook. & Arn.
• Cynoctonum nummulariifolium (Hook. & Arn.) Decne.
• Vincetoxicum nummulariifolium (Hook. & Arn.) Kuntze
• Cynanchum nanissimum Liede
• Cynanchum nanellum P.T.Li
• Cynanchum nanum Skottsb.
• Cynanchum patagonicum (Phil.) Malme
• Cynoctonum patagonicum Phil.
• Vincetoxicum patagonicum (Phil.) Kuntze
• Diplolepis nummulariifolia var. biflora (Phil.) Hechem & C.Ezcurra
• Cynanchum nummulariaefolium var. biflorum (Phil.) Reiche
• Cynoctonum biflorum Phil.
• Diplolepis biflora (Phil.) Hechem & C.Ezcurra
• Vincetoxicum biflorum (Phil.) Kuntze

Description: Diplolepis nummulariifoliaSN|34789]]SN|34789]] var. biflora (syn: Cynanchum nummulariifoliumSN|34790]]SN|34790]] var. biflorum) is a delicate rhizomatous, perennial herb that form small soft bushes of light green colour, 5 to 15 cm hight. It is recognized by its stems that secrete latex when broken. It blooms at the beginning of summer.
Derivation of names: The epithet nummulariifolium means "with leaves like coins", and biflorum, "with two flowers".
Stems: Thin, tender, decumbent or creeping, finely hairy or glabrous with latex.
Leaves: Opposite, orbicular to ovate, 7-10 mm long, 6-9 mm wide, membranous, glabrous, usually folded. Petiole short finely hairy. Apex obtuse to rounded. Base rounded to cuneate.
Inflorescence: Umbelliform, lateral, extraaxillary, mostly 1-4 flowered. Peduncle less than 3 mm long, finely hairy. Bracteoles narrowly triangular, less than 1 mm long. Pedicels less than 3 mm long.
Flowers: Up to 3 mm long, cream coloured, often with ochraceous or chestnut hues.
Fruits (follicles): Fusiform 2.5-3.5 cm long and approx. 1 cm in diameter, acute.
Seeds: Numerous 5-6 mm long, 3-4 mm wide, with a tuft of white hairs (coma) 1.5 cm long.

Bibliography: Major references and further lectures
1) "Flora Patagonica", Volume 8, Part 6, Instituto Nacional de Technologia Argropecuaría, 1999
2) "Flores de Alta Montaña de los Andes Patagónicos: Guía para el reconocimiento de las principales especies de plantas vasculares altoandinas". 1° Edición – Buenos Aires: L.O.L.A., 2005, 240 p.; 22x12 cm.
3) Ferreyra, Marcela; Ezcurra, Cecilia; Clayton, Sonia, Diplolepis biflora, Sistema de Información sobre Biodiversidad (SIB) web: https://www.sib.gov.ar/ficha/PLANTAE*diplolepis*biflora