Muehlenbeckia |
Muehlenbeckia complexa |
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maidenhair vine, wirevine |
lacy wirevine, maidenhair vine, Mattress vine |
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Habit | Shrubs, vinelike, perennial; rhizomatous. | Plants (0.5–)1–5 m. Stems prostrate to scandent, especially distally, sometimes rooting at nodes, striate, branched, glabrescent or puberulent, distal branches brownish-puberulent. | ||||
Stems | suberect, prostrate, or scandent, glabrous or puberulent, sometimes papillose. |
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Leaves | deciduous, cauline, alternate, usually petiolate; ocrea usually deciduous, sometimes persistent, chartaceous; petiole base articulated, extrafloral nectaries present; blade linear to orbiculate, panduriform, or triangular-lanceolate, margins entire or irregularly wavy. |
ocrea deciduous, brownish hyaline, cylindric, 2–3 mm, margins truncate, eciliate, faces puberulent along veins; petiole 3–10 mm, brownish-puberulent; blade ovate-oblong to suborbiculate or panduriform, 0.5–2.5(–4) × 0.5–2.5(–4) cm, coriaceous, base truncate, margins entire, glabrous or scabrous, apex rounded to apiculate, glabrous adaxially and abaxially, or puberulent abaxially along midvein, obscurely punctuate abaxially. |
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Inflorescences | terminal and axillary, spikelike, essentially not pedunculate. |
terminal and axillary, 5–30 mm. |
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Pedicels | prescent. |
ascending to spreading, 1.5–2 mm. |
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Flowers | bisexual and unisexual, with staminate, pistillate, or sometimes both sexes occurring with bisexual flowers on the same plant, 1–2(–5) per ocreate fascicle, base stipelike; perianth accrescent, white to greenish white, campanulate, glabrous; tepals 5, connate proximally, sepaloid, dimorphic, outer slightly larger than inner. |
1–2(–5) per ocreate fascicle; perianth yellowish green or greenish; tepals connate ca. 1/4 their length, lanceolate-ovate to obovate, 2–4 mm, apex rounded to acute. |
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Staminate flowers | stamens 8 (9); filaments distinct, adnate to base of perianth tube, glabrous; anthers yellow or pink to purple, ovate to elliptic; pistil rudimentary. |
anthers pink to purple, ovate to elliptic. |
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Pistillate flowers | tube white or reddish purple to black in fruit, becoming fleshy; stamens rudimentary; styles 3, spreading, connate proximally; stigmas fimbriate. |
tube white in fruit. |
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Achenes | completely or partly included in fleshy perianth, black or dark brown, unwinged, 3-gonous to subglobose, glabrous. |
exserted or included, black or dark brown, 3-gonous, 3–4 × 2–3 mm, shiny, smooth. |
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Seeds | embryo straight. |
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x | = 10. |
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2n | = 20 (New Zealand). |
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Muehlenbeckia |
Muehlenbeckia complexa |
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Phenology | Flowering Jul–Sep. | |||||
Habitat | Sunny, disturbed sites, often in urban areas | |||||
Elevation | 0-500 m (0-1600 ft) | |||||
Distribution |
Central America; South America; Pacific Islands (New Zealand); Australia [Introduced in North America] |
CA; Pacific Islands (New Zealand) [Introduced in North America]
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Discussion | species 23 (2 in the flora) (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Muehlenbeckia complexa is cultivated as an ornamental and escapes rarely in the flora area. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 5, p. 485. | FNA vol. 5, p. 485. | ||||
Parent taxa | ||||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Polygonum complexum | |||||
Name authority | Meisner: Pl. Vasc. Gen. 1: 316 | (A. Cunningham) Meisner: Pl. Vasc. Gen. 2: 227. (1841) | ||||
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