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Photo is of parent taxon
Habit Plants (0.5–)1–3 cm.
Stems

suberect to scandent or climbing, angular, striate, diffusely branched, glabrous, sometimes papillose, distal branches usually glabrous.

Leaves

ocrea mostly persistent, brownish hyaline, cylindric, 3–5 mm, margins truncate to rounded, eciliate, faces glabrous;

petiole (3–)6–12(–17) mm, glabrous;

blade triangular-lanceolate, (2–)2.5–4(–5.5) × (0.8–)1.2–2.5(–3) cm, subcoriaceous, base hastate, margins entire or irregularly wavy, glabrous or scabrous, apex acute, glabrous adaxially and abaxially, sometimes papillose abaxially, minutely punctate abaxially and adaxially.

Inflorescences

terminal and axillary, 3–5(–8) cm.

Pedicels

ascending to spreading, 1.5–2 mm.

Flowers

1(–3) per ocreate fascicle;

perianth white, greenish white, or greenish;

tepals connate ca. 1/4 their length, lanceolate-ovate to obovate, 2–3 mm, apex rounded to acute.

Staminate flowers

anthers yellow or pink, ovate.

Pistillate flowers

tube reddish purple to black in fruit.

Achenes

usually included, black, subglobose, 3–4 × 2.5–3.5 mm, shiny, smooth.

Muehlenbeckia hastulata var. hastulata

Phenology Flowering Jul–Aug.
Habitat Sunny, disturbed sites, often in urban areas
Elevation 0-500 m (0-1600 ft)
Distribution
from FNA
CA; South America (Argentina, Chile) [Introduced in North America]
Discussion

Variety hastulata is cultivated as an ornamental. It escapes rarely in the flora area and can be invasive.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 5, p. 486.
Parent taxa Polygonaceae > subfam. Polygonoideae > Muehlenbeckia > Muehlenbeckia hastulata
Name authority unknown
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