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1 Plant parasitic; stems orange; [tribe Cuscuteae) |
1 Plant photosynthetic; stems green. |
..2 Corolla 0.1-0.2 cm long; capsule deeply 2-lobed; leaves orbicular-reniform, 1-3 cm long and wide, not fleshy; [tribe Dichondreae] |
..2 Corolla 1-10 cm long; capsule entire; leaves various, but not as above (most similar vegetatively are Calystegia soldanella, Ipomoea brasiliensis, and Ipomoea imperati, all beach plants with fleshy, emarginate, and usually larger leaves). |
....3 Styles 2, free nearly to the ovary or fused most of their length (at least the terminal 1-2 mm free); corolla either 1-2.5 cm long ( Evolvulus, Stylisma) or 7-10 cm long ( Bonamia); leaves cuneate or rounded at the base, and narrowly ovate, lanceolate, or linear; [tribe Cresseae]. |
......4 Styles free, each 2-cleft, the stigmas therefore 4, linear-filiform |
......4 Styles free or fused at the base, the stigmas 2, globose-peltate. |
........5 Flowers 7-10 cm long; leaves ovate, < 2× as long as wide; [FL only, north to Marion County] |
........5 Flowers 1-2.5 cm long; leaves narrowly ovate, lanceolate, or linear, > 2× as long as wide; [widespread in our area, primarily in the Coastal Plain] |
....3 Styles 1 (sometimes with 2 stigmas, or a bilobed stigma); stigmas capitate, globose, elongate, flattened, or filiform; corolla > 2.5 cm long (except Jacquemontia, Convolvulus, and a few Ipomoea spp.); leaves cordate, sagittate, or truncate at the base, and (mostly) ovate in outline. |
..........6 Calyx concealed by 2 large bracts; [tribe Convolvuleae] |
..........6 Calyx not concealed by bracts. |
............ 7 Outer 3 sepals distinctly wider and longer than the inner sepals (and lacking an attenuated tip). |
............ 7 Outer 3 sepals similarly sized to the inner, or if longer then with an attenuated tip. |
............ ..8 Stigmas 2, linear or elongate; leaves 2-4 cm long, truncate or weakly hastate at base; corolla white or pink |
............ ....9 Stigmas elongate but not linear; [tribe Jacquemontiae] |
............ ....9 Stigmas filiform; [tribe Convolvuleae] |
............ ..8 Stigma 1, capitate (or sometimes 2-lobed); leaves 3-15 cm long, mostly strongly hastate or cordate at base; corolla white, pink, lavender, blue, yellow, orange, or red. |
............ ......10 Anthers straight after dehiscence; fruits valvate-dehiscent; [tribe Ipomoeeae] |
............ ......10 Anthers coiled after dehiscence (making 1-4 complete 360 degree turns); fruits longitudinally or irregularly dehiscent; [tribe Merremieae]. |
............ ........11 Fruit a four-valved capsule; [s. GA and FL to TX in our region] |
............ ........11 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] |
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. |
........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] |
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 Leaves either scale-like or elongate and tapering; flowers radially symmetrical |
......4 Leaves lanceolate-elliptic; flowers bilaterally symmetrical |