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smooth to ciliate or barbed awns or scales. Mostly subtropical and warm-temperate New World and Old World. Genera 20, species 374 (7 genera, 69 species

subtropical and warm-temperate New World. Genera 12, species 76 (11 genera, 45 species in the flora). In most genera of Ambrosiinae, proximal heads are erect

awns, sometimes coroniform. Mostly subtropical, tropical, and warm-temperate New World. Genera 17, species 363 (8 genera, 69 species, including 1 hybrid

bristles (all in 1 series, sometimes connate). Mostly subtropical, tropical, and warm-temperate New World. Genera 3, species 27 (3 genera, 10 species in

bristles in 2 series (outer usually shorter). x = 9. Mostly subtropical, tropical, and warm-temperate New World. Species ca. 18 (6 in the flora). G. L. Nesom

or awns, sometimes of bristles and scales. Mostly subtropics, tropics, and warm-temperate New World, also in Old World. Genera 170, species 2400 (27 genera

sometimes combinations of scales and/or awns and/or bristles. Almost wholly New World, mostly subtropical, tropical, and warm-temperate. Genera ca. 300, species

Nearly worldwide, most abundant in tropics, subtropics, and warm-temperate regions, evidently absent from alpine and arctic regions. Genera ca. 65, species

setiform scales (or flattened bristles) in 1 series. Subtropical, tropical, and warm-temperate New World. Genera 15, species 103 (4 genera, 8 species in the

enlarged and protruding as ridge or wing. Throughout New World from near Arctic Circle to Patagonia, introduced especially in tropical, subtropical, and warm-temperate

indigenous to the Old World, and of these only Phaeoptilum does not occur in the New World. Mirabilis is represented in the New World by almost 60 indigenous

of bristles and scales in 1–2+ series, rarely coroniform or 0. Mostly subtropical, tropical, and warm-temperate, especially arid New World. Genera 22,

rich in numbers of species and/or in numbers of plants in arid and semiarid regions of subtropical and lower to middle temperate latitudes. Genera ca. 1500

its subtending phyllary); pappi 0 (or rudimentary). Subtropical, tropical, and warm-temperate New World. Genera 5, species 80 (3 genera, 11 species in the

reticulate; embryo annular. x = 16, 17. Mostly tropical, subtropical, and warm-temperate zones, some species in temperate zones, some taxa are at present almost

Islands, Madeira, and Azores), Bermuda, and St. Helena (124); and New Zealand (111). These and other indigenous angiosperm floras of the world are listed in

subcontinental, continental, humid and warm summer, humid and warm summer with humid winters, and permanently humid with warm summer. Climates of the west coast

Zonobiomes V (warm temperate maritime) and VI (temperate with a cold winter---nemoral). In the southeastern coastal plain, coniferous and broad-leaved evergreen