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University of California, Berkeley | |||||
Jepson Herbarium | |||||
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Jepson eFlora: Taxon page
Key to families | Table of families and genera |
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Index to accepted names and synonyms: | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | |
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Family: Convolvulaceae | View Description | Dichotomous Key |
Genus: Cuscuta | View Description | Dichotomous Key |
Species: | View Description | Dichotomous Key |
Higher Taxonomy
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Cuscuta japonica Choisy var. formosana (Hayata) Yunck. URBAN WEED EXPECTED IN WILDLANDS Inflorescence: spike-like with clusters of 1--3 flowers; pedicels 0.2--1 mm. Flower: 4--7 mm, membranous except fleshy at bases of receptacle, parts in 5s; calyx 1/3--1/2 corolla tube, cup-shaped, divided +- 2/3, not veined, not shiny, not papillate, lobes ovate to round, bases overlapped, margins irregular, tip rounded to obtuse; corolla tube 3--4 mm, cylindric-bell-shaped, scales 1/2--3/4 corolla tube, oblong, rounded, uniformly densely fringed, lobes erect to reflexed, 1/3 tube, triangular-ovate, margins irregularly minute-crenate to entire, tip rounded to obtuse; filaments 0--0.1 mm, anthers included, 0.7--1 mm, elliptic to oblong; styles 2, fused, 1--1.8 mm, >= ovary, stigmas; stigmas 0.5--0.7 mm, +- square. Fruit: circumscissile, 5--9 mm, 4--5 mm wide, conic-cylindric, without opening between styles, not translucent, capped by corolla. Ecology: Woody pls, e.g., Vitis; Prunus; Elevation: < 100 m. Bioregional Distribution: ScV, CCo, and spreading; Distribution Outside California: Florida, South Carolina, Texas; native to Asia. Flowering Time: Sep--Nov Note: Evidently spreading vegetatively, no mature fruit seen; examined herbarium material belongs to Cuscuta japonica var. formosana, but Cuscuta japonica var. japonica (flower 3--4.5 mm; stigma +- conic) also may be present in California. Synonyms: Cuscuta formosana Hayata; eFlora Treatment Author: Mihai Costea & Saša Stefanović Reference: Costea & Stefanovic 2009 Syst Bot 34:570--579 Unabridged Reference: Costea et al. 2005 Brittonia 57:264--272; Costea et al. 2006 Sida 22:151--175, 177--195, 197--207, 209--225; Costea & Stefanovic 2009. Cuscuta jepsonii (Convolvulaceae), an invasive weed or an extinct endemic? Amer J Bot 96:1744--1750; Costea et al. 2009. Untangling the systematics of salt marsh dodders: Cuscuta pacifica a new segregate species from Cuscuta salina (Convolvulaceae). Syst Bot 34:787--795; Costea & Stefanovic. 2009. Molecular phylogeny of Cuscuta californica complex (Convolvulaceae) and a new species from New Mexico and Trans-Pecos. Syst Bot 34:570--579; Costea & Tardif 2006 Canad J Pl Sci 86:293--316 Jepson Online Interchange Noxious Weed Previous taxon: Cuscuta indecora var. indecora Next taxon: Cuscuta jepsonii |
Citation for this treatment: Mihai Costea & Saša Stefanović 2012, Cuscuta japonica var. formosana, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=82049, accessed on April 20, 2018. Citation for the whole project: Jepson Flora Project (eds.) 2018, Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on April 20, 2018.
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