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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] |