No key was found for the requested taxon, but it has only one child: Leiphaimos parasitica. Showing where it is keyed below.

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Key to Gentianaceae

Gentianaceae

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(c) Bradley, Keith
(c) Dill, Becky
1 Leaves all scale-like, 1-3 (-5) mm long, appressed to the stem.
(c) Danielson, Erik
  2 Plants green or purplish-brown, with chlorophyll (hemimycoheterotrophic); [tribe Gentianeae, subtribe Swertiinae]
(c) Bradley, Keith
  2 Plants white or cream, lacking chlorophyll (holomycoheterotrophic); [tribe Voyrieae]
(c) Sorrie, Bruce A. - CC-BY
1 Leaves larger, spreading or ascending.
(c) Ware, Richard & Teresa - CC-BY-NC, permission granted to NCBG
(c) Sorrie, Bruce A. - CC-BY
    3 Stem leaves whorled; plants robust, 1-3 m tall; [tribe Gentianeae, subtribe Swertiinae]
    3 Stem leaves opposite; plants generally < 1 m tall.
(c) Frumkin, Ron - CC-BY-NC, permission granted to NCBG
(c) Nesterova, Svetlana - CC-BY-NC, permission granted to NCBG
      4 Calyx lobes 6-8; corolla bright yellow
      4 Calyx lobes 4-5 except Obolaria with 0 calyx lobes (this sometimes interpreted as 2, see below); corolla pink, blue, white.
(c) Ware, Richard & Teresa - CC-BY-NC, permission granted to NCBG
        5 Calyx lobes 0 (the 2 leaflike bracts subtending the flowers have sometimes been interpreted as sepals); stem leaves obovate, widest near the rounded tip), 0.5-1.5 cm long, crowded near the tip of the stem, basal rosette never present; [of nutrient-rich, mesic forests]; [tribe Gentianeae, subtribe Swertiinae]
(c) Ward, Scott G
        5 Calyx lobes 4-5; stem leaves lanceolate, ovate, elliptic or narrowly elliptic (widest near the middle or toward the base, the tip acute or acuminate), mostly > 1.5 cm long, distributed fairly evenly along the stem, basal rosettes sometimes present; [of various more-or-less open habitats (except some species of Gentiana, which can occur in nutrient-rich, mesic forests)].
© Floyd A. Griffith
(c) Griffith, Floyd A.
          6 Corolla lobes 5-14, longer than the corolla tube, pink or white; [common natives]; [tribe Chironieae, subtribe Chironiinae].
(c) Cressler, Alan M.
             7 Stigmas shorter than the style
(c) Griffith, Floyd A.
             7 Stigmas equaling or longer than the style
(c) Ward, Scott G
(c) Bradley, Keith
          6 Corolla lobes 4-5, shorter than the corolla tube (occasionally slightly longer in Zeltnera), blue, lavender, pink or white.
(c) Rompaey, Lies Van - CC-BY
               8 Corolla tube slender, < 2 mm wide; [natives and non-natives (if the latter then uncommon)]; [tribe Chironieae, subtribe Chironiinae].
(c) Langeveld, Michel - CC-BY
                 9 Inflorescence a corymbiform to paniculate cyme (not obviously spiciform, broader in outline).
                   10 Style slightly bifid; stigma lobes fleshy, reniform to shoe-shaped (not fan-shaped); capsule linear; [non-natives, both east and west of the Mississippi River]
                   10 Style fan-shaped and unlobed OR if lobed, then with 2 fan-shaped lobes (these not reniform); stigma lobes not fleshy, fan-shaped (if lobes present); capsule narrowly-ellipsoid to ovoid; [natives, west of the Mississippi River]
               8 Corolla tube wider, 3 mm wide or wider; [collectively widespread natives]; [tribe Gentianeae; subtribe Gentianinae]
(c) Cressler, Alan M.
(c) Ward, Scott G
                     11 Corolla lobes alternating with corolla appendages (appearing as plaits or lobes, these often toothed, notched, or lacerate, sometimes as long as or longer than the true corolla lobes); main stem leaves cuneate at the base; perennial; [tribe Gentianeae, subtribe Gentianinae]
(c) Ware, Richard & Teresa - CC-BY-NC, permission granted to NCBG
                     11 Corolla lobes not alternating with corolla appendages; main stem leaves rounded to cordate at the base; biennial or annual; [tribe Gentianeae, subtribe Swertiinae].
(c) Ware, Richard & Teresa - CC-BY-NC, permission granted to NCBG
                       12 Corolla lobes 4, finely fringed; main stem leaves rounded at base, with lateral veins obscure; biennial
© Derick Poindexter
(c) Gunnar, Aaron - CC-BY
                       12 Corolla lobes 5, entire, not fringed; main stem leaves cordate (the cordate bases often overlapping the opposite leaf), with 2-3 well-developed lateral veins (prominently visible on the lower surface); annual
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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]