Habit: Vine, annual (perennial herb if on perennial host), not in contact with ground, attached to, holoparasitic on host by many small, specialized roots (haustoria) along stem, generally glabrous.
Stem: thread-like, +- green, yellow, orange, or +- red.
Leaf: 0 or scale-like, alternate, +- 2 mm.
Inflorescence: generally cyme, head- to panicle-like (flowers 1), subtended by 0--3 bracts.
Flower: bisexual, radial, parts generally in 4s or 5s; calyx generally divided 2/5--3/5, persistent, generally +- cream-white; corolla generally +- white, persistent (withered in fruit) or not, tube cup-shaped to cylindric, bulged or horizontally ridged below lobes or generally not, generally with scales subtending stamens, lobes alternate stamens, erect to reflexed; ovary superior, chambers 2, each 2-ovuled, styles 2, generally free, persistent, stigmas 2, generally spheric, persistent.
Fruit: capsule, generally indehiscent to irregularly dehiscent (or circumscissile near base), spheric to ovoid, depressed or not, thickened and/or raised around generally inconspicuous opening between styles or not.
Seed: 1--4; coat papillate when hydrated, honeycombed when dry, (rarely neither, with cells +- rectangular, in +- jigsaw-puzzle-like arrangement); embryo generally slender, 1--3-coiled.
Species In Genus: +- 180 species: cosmopolitan, especially warmer regions of western hemisphere and Polynesia.
Etymology: (Aramaic, Hebrew; from the verb K-S-Y (Kaph, Shin, Yodh), to cover, from habit)
Note: By persistent, withered corolla, fruit may be "capped" (corolla on top of fruit), "surrounded" (fruit at least in part visible, corolla +- loosely around fruit), or "enclosed" (fruit not visible, corolla +- tightly around fruit).
Cuscuta pentagona Engelm. excluded.
Jepson eFlora 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--316Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)Key to Cuscuta
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