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some tribes in North America, particularly Heliantheae in the broad sense and Eupatorieae, which originated in the continent (including Mexico and parts of

x = 10. Conn., N.J., N.Y., Wash., Va., W.Va., Del., D.C, Wis., N.Dak., S.Dak., Ariz., N.Mex., Pacific Islands (Hawaii), Mass., Maine, N.H., R.I., Vt.,

oblong-ellipsoid, prismatic, wings absent. x = 19, 24. North America, Mexico, Central America, South America, Europe, Asia, n Africa, introduced widely. Species ca. 150

x = 11. Tropical to temperate regions in North America, West Indies, Central America, South America, including Galápagos Islands, Africa, Madagascar, Sri

papillate), not mucilaginous when wetted; cotyledons accumbent. North America, n Mexico, e Asia (Russian Far East). Species 111+ (109 in the flora). Boechera

curved; endosperm copious, cellular, oily. North America, Mexico, West Indies, Central America, South America, s Europe, e, se Asia, warm-temperate and

= 10. North America, Mexico, West Indies, Central America, n South America, Eurasia, introduced nearly worldwide. Species ca. 70 (19, including 3 hybrids

Legacy Map Ala., Calif., Fla., Ga., La., N.C., S.C., Tex., Mexico, West Indies, Central America, n South America, Pacific Islands (Galapagos Islands, Hawaii)

Minn., Mont., N.Dak., Nebr., N.Mex., Nev., Oreg., Pa., S.C., Vt., Alaska, Mass., N.H., R.I., Fla., Wyo., Kans., Tex., La., Miss., Tenn., N.C., S.Dak., Utah

persistent perisperm present; cotyledons incumbent. x = 11. sw North America, n Mexico, South America (Bolivia). Genus 1, species 2 (1 in the flora). Koeberlinia

families known to occur in Mexico (236), Central America including Mexico (245), and South America (273). Other than Mexico, the richest flowering-plant

latitude and dominates 28% of the North America landmass north of Mexico, making it the most extensive formation in North America. The northern transition from