No key was found for the requested taxon, but its parent (Cuscuta) is keyed as shown below.

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Key to Convolvulaceae

Convolvulaceae

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1 Plant parasitic; stems orange; [tribe Cuscuteae)
1 Plant photosynthetic; stems green.
(c) Hill, Sonnia
(c) Wrens, Sequoia Janirella - CC-BY-NC, permission granted to NCBG
  2 Corolla minute (0.1-0.2 cm long), much shorter than calyx lobes; capsules deeply 2-lobed; leaves orbicular-reniform (appearing Asarum-like in shape), with long petioles, not fleshy; [tribe Dichondreae]
  2 Corolla 1-10 cm long (or if < 1 cm as in Poranopsis, then the corolla longer than the calyx, and flowers borne in large panicles); capsules not deeply lobed; leaves various, but not as above (if rarely orbicular, then leaves fleshy and plants of beach habitats as in Convolvulus soldanella, Ipomoea brasiliensis, and Ipomoea imperati), the petioles short or absent.
    3 Flowers numerously arranged in large panicles; [uncommon non-native, se. FL]
    3 Flowers not arranged in large panicles; [widespread, native and non-native].
      4 Styles 2, free or only fused basally; leaves cuneate or rounded at the base, and narrowly ovate, lanceolate, or linear in outline; [tribe Cresseae].
        5 Styles free, each 2-cleft, the stigmas therefore 4, linear-filiform
        5 Styles free or fused at the base, the stigmas 2, globose-peltate or capitate.
          6 Leaf blades 1-10 mm long (sometimes scale-like), corollas 5-7 mm long; [saline or alkaline habitats, TX southward]
          6 Leaf blades 10-60 mm long (sometimes linear, but never scale-like); corolla (8-)10-100 mm long; [habitats various, collectively widespread]
(c) Bradley, Keith
             7 Flowers 70-100 mm long; leaves ovate, < 2× as long as wide; [FL only, north to Marion County]
(c) Horn, Jay
(c) Sorrie, Bruce A. - CC-BY
             7 Flowers (8-)10-25 mm long; leaves narrowly ovate, lanceolate, or linear, > 2× as long as wide; [widespread in our area, primarily in the Coastal Plain]
      4 Styles 1 (sometimes with 2 stigmas, or a bilobed stigma); leaves cordate, sagittate, or truncate at the base, and (mostly) ovate in outline.
               8 Calyx concealed by 2 large bracts; [tribe Convolvuleae]
               8 Calyx not concealed by bracts (Aniseia sometimes with 3 large outer sepals appearing superficially similar to bracts).
                 9 Outer 3 sepals distinctly wider and longer than the inner sepals (and lacking an attenuated tip).
                 9 Outer 3 sepals similarly sized to the inner, or if longer then with an attenuated tip.
(c) 趙珮珽 - CC-BY
                   10 Capsules indehiscent (not splitting); leaves abaxially black-glandular-punctate; [uncommon non-native, s. FL]
                   10 Capsules dehiscent (splitting at maturity); leaves not abaxially black-glandular-punctate; [widespread, natives and non-natives]
                     11 Stigmas 2, the lobes not capitate or globse (instead cylindric or elliptic to subulate); leaves 2-4 cm long, truncate or weakly hastate at base; corolla white or pink.
                     11 Stigma 1, capitate or globse (sometimes 2-lobed); leaves 3-15 cm long, mostly strongly hastate or cordate at base; corolla white, pink, lavender, blue, yellow, orange, or red. ADD CAMONEA
                          13 Anthers coiled after dehiscence (making 1-4 complete 360 degree turns); fruits longitudinally or irregularly dehiscent; [tribe Merremieae].
                            14 Leaf blades palmately lobed or compound; flowers primarily white with lighter purple or blue coloration (except Distimake tuberosus, which has yellow flowers but deeply palmately lobed leaves).
(c) Marcum, Paul
                              15 Fruit a four-valved capsule; [s. GA and FL to TX in our region]
(c) Hernández, Alexis López - CC-BY
                              15 Fruit an operculate capsule (with a leathery exocarp that falls off like a lid and a brittle endocarp that shatters irregularly); [s. TX only in our region]
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Key K: holoparasites and holomycotrophs

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1 Stems thin, flexible, twining, yellow to bright orange; plants parasitic on the stems of other vascular plants via above-ground haustoria.
  2 Inflorescence a spike; flowers 3-merous (sepals 6, petals 0, stamens 9, carpel 1); fruit a 1-seeded fleshy drupe; fresh plants aromatic; [Basal Angiosperms]; [peninsular FL only]
  2 Inflorescence a cymose cluster; flowers 4-5-merous (sepals 4-5, petals 4-5, stamens 4-5, carpels 2 and fused); fruit a 1-4-seeded dry capsule; fresh plants not aromatic; [Eudicots]; [widespread]
1 Stems erect, stiff, straight, variously colored (tan, red, violet, brown, white, pink); plants mycotrophic (or indirectly parasitic via a fungal intermediary), attached to fungi underground.
    3 Flowers radially symmetrical.
      4 Scale leaves alternate (spiral); [collectively widespread]
      4 Scale leaves opposite; [s. FL only]
    3 Flowers bilaterally symmetrical.
(c) Cressler, Alan M.
        5 Petals 3, separate; stamen 1; capsule 1-locular, pendent when mature, opening by 3 slits; [Monocots]
        5 Petals fused into a tube, with 4-5 lobes; stamens 4; capsule 2-locular, ascending or spreading when mature, opening by 2 valves; [Eudicots]
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Key L: epiphytic angiosperms {Note that epiphytic Pteridophytes are not re-keyed here; seek them in Keys A4 and A6}

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1 Stems yellow to bright orange, lacking leaves
1 Stems green or brown, with leaves (scale-like or larger).
  2 Leaves opposite, orbicular or oblanceolate, rounded at the apex; [Eudicots]
  2 Leaves alternate, either orbicular or oblanceolate (rounded at the apex), or scale-like, or elongate and tapering, or lanceolate-elliptic.
    3 Leaves orbicular, rounded at the apex; [Basal Angiosperms]
    3 Leaves either scale-like, or elongate and tapering, or lanceolate-elliptic; [Monocots].
      4 Plants long-pendent, growing in variously abundant clumps draped along the branches of trees, the leaves densely gray and scaly
      4 Plants primarily erect, not long-pendent nor growing as long pendent clumps draping from trees or other hosts, the leaves variously colored and textured (including sometimes gray and scaly).
        5 Leaves either scale-like or elongate and tapering (the leaves often erect and stiffened); plants with bulbous bases but lacking pseudobulbs (often, but not always with a "vase-like" appearance in which water pools); flowers radially symmetrical
(c) Montes de Oca, Joseph - CC-BY-NC, permission granted to NCBG
(c) Ward, Scott G
        5 Leaves lanceolate-elliptic; plants with variously-shaped bases, often bearing pseudobulbs (although not always); flowers bilaterally symmetrical, the corolla bearing a specialized lip (labellum)