| Belize | | | Balick, M. J., M. H. Nee & D.E. Atha | 2000 | Checklist of the vascular plants of Belize | Mem. New York Bot. Gard. | 85: i–ix, 1–246 |
| Belize | | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Caribbean | Dominican Republic | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Caribbean | Jamaica | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Corsica | | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Costa Rica | | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Guatemala | | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Japan | | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Mexico | Aguascalientes | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Mexico | Aguascalientes | | Villaseñor Ríos, J. L. | 2016 | Checklist of the native vascular plants of Mexico. Catálogo de las plantas vasculares nativas de México. | Revista Mex. Biodivers. | 87(3): 559–902 |
| Mexico | Baja California | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Mexico | Baja California | | Villaseñor Ríos, J. L. | 2016 | Checklist of the native vascular plants of Mexico. Catálogo de las plantas vasculares nativas de México. | Revista Mex. Biodivers. | 87(3): 559–902 |
| Mexico | Baja California Sur | | Villaseñor Ríos, J. L. | 2016 | Checklist of the native vascular plants of Mexico. Catálogo de las plantas vasculares nativas de México. | Revista Mex. Biodivers. | 87(3): 559–902 |
| Mexico | Baja California Sur | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Mexico | Campeche | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Mexico | Campeche | | Villaseñor Ríos, J. L. | 2016 | Checklist of the native vascular plants of Mexico. Catálogo de las plantas vasculares nativas de México. | Revista Mex. Biodivers. | 87(3): 559–902 |
| Mexico | Chiapas | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Mexico | Chiapas | | Villaseñor Ríos, J. L. | 2016 | Checklist of the native vascular plants of Mexico. Catálogo de las plantas vasculares nativas de México. | Revista Mex. Biodivers. | 87(3): 559–902 |
| Mexico | Chihuahua | | Villaseñor Ríos, J. L. | 2016 | Checklist of the native vascular plants of Mexico. Catálogo de las plantas vasculares nativas de México. | Revista Mex. Biodivers. | 87(3): 559–902 |
| Mexico | Chihuahua | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Mexico | Chihuahua | Delicias | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Mexico | Coahuila | | Villaseñor Ríos, J. L. | 2016 | Checklist of the native vascular plants of Mexico. Catálogo de las plantas vasculares nativas de México. | Revista Mex. Biodivers. | 87(3): 559–902 |
| Mexico | Coahuila | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Mexico | Colima | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Mexico | Colima | | Villaseñor Ríos, J. L. | 2016 | Checklist of the native vascular plants of Mexico. Catálogo de las plantas vasculares nativas de México. | Revista Mex. Biodivers. | 87(3): 559–902 |
| Mexico | Distrito Federal (use Ciudad de México) | | Villaseñor Ríos, J. L. | 2016 | Checklist of the native vascular plants of Mexico. Catálogo de las plantas vasculares nativas de México. | Revista Mex. Biodivers. | 87(3): 559–902 |
| Mexico | Distrito Federal (use Ciudad de México) | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Mexico | Durango | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Mexico | Durango | | Villaseñor Ríos, J. L. | 2016 | Checklist of the native vascular plants of Mexico. Catálogo de las plantas vasculares nativas de México. | Revista Mex. Biodivers. | 87(3): 559–902 |
| Mexico | Guanajuato | | Villaseñor Ríos, J. L. | 2016 | Checklist of the native vascular plants of Mexico. Catálogo de las plantas vasculares nativas de México. | Revista Mex. Biodivers. | 87(3): 559–902 |
| Mexico | Guanajuato | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Mexico | Guerrero | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Mexico | Guerrero | | Villaseñor Ríos, J. L. | 2016 | Checklist of the native vascular plants of Mexico. Catálogo de las plantas vasculares nativas de México. | Revista Mex. Biodivers. | 87(3): 559–902 |
| Mexico | Hidalgo | | Villaseñor Ríos, J. L. | 2016 | Checklist of the native vascular plants of Mexico. Catálogo de las plantas vasculares nativas de México. | Revista Mex. Biodivers. | 87(3): 559–902 |
| Mexico | Hidalgo | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Mexico | Jalisco | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Mexico | Jalisco | | Villaseñor Ríos, J. L. | 2016 | Checklist of the native vascular plants of Mexico. Catálogo de las plantas vasculares nativas de México. | Revista Mex. Biodivers. | 87(3): 559–902 |
| Mexico | México | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Mexico | México | | Villaseñor Ríos, J. L. | 2016 | Checklist of the native vascular plants of Mexico. Catálogo de las plantas vasculares nativas de México. | Revista Mex. Biodivers. | 87(3): 559–902 |
| Mexico | Michoacán | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Mexico | Michoacán | | Villaseñor Ríos, J. L. | 2016 | Checklist of the native vascular plants of Mexico. Catálogo de las plantas vasculares nativas de México. | Revista Mex. Biodivers. | 87(3): 559–902 |
| Mexico | Morelos | | Villaseñor Ríos, J. L. | 2016 | Checklist of the native vascular plants of Mexico. Catálogo de las plantas vasculares nativas de México. | Revista Mex. Biodivers. | 87(3): 559–902 |
| Mexico | Morelos | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Mexico | Nayarit | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Mexico | Nayarit | | Villaseñor Ríos, J. L. | 2016 | Checklist of the native vascular plants of Mexico. Catálogo de las plantas vasculares nativas de México. | Revista Mex. Biodivers. | 87(3): 559–902 |
| Mexico | Nuevo León | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Mexico | Nuevo León | | Villaseñor Ríos, J. L. | 2016 | Checklist of the native vascular plants of Mexico. Catálogo de las plantas vasculares nativas de México. | Revista Mex. Biodivers. | 87(3): 559–902 |
| Mexico | Oaxaca | | Villaseñor Ríos, J. L. | 2016 | Checklist of the native vascular plants of Mexico. Catálogo de las plantas vasculares nativas de México. | Revista Mex. Biodivers. | 87(3): 559–902 |
| Mexico | Oaxaca | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Mexico | Oaxaca | | García-Mendoza, A. J. & J. A. Meave del Castillo | 2011 | (none) | Divers. Floríst. Oaxaca | 1–351 |
| Mexico | Puebla | | Villaseñor Ríos, J. L. | 2016 | Checklist of the native vascular plants of Mexico. Catálogo de las plantas vasculares nativas de México. | Revista Mex. Biodivers. | 87(3): 559–902 |
| Mexico | Puebla | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Mexico | Querétaro | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Mexico | Querétaro | | Villaseñor Ríos, J. L. | 2016 | Checklist of the native vascular plants of Mexico. Catálogo de las plantas vasculares nativas de México. | Revista Mex. Biodivers. | 87(3): 559–902 |
| Mexico | Quintana Roo | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Mexico | Quintana Roo | | Villaseñor Ríos, J. L. | 2016 | Checklist of the native vascular plants of Mexico. Catálogo de las plantas vasculares nativas de México. | Revista Mex. Biodivers. | 87(3): 559–902 |
| Mexico | San Luis Potosí | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Mexico | San Luis Potosí | | Villaseñor Ríos, J. L. | 2016 | Checklist of the native vascular plants of Mexico. Catálogo de las plantas vasculares nativas de México. | Revista Mex. Biodivers. | 87(3): 559–902 |
| Mexico | Sinaloa | | Villaseñor Ríos, J. L. | 2016 | Checklist of the native vascular plants of Mexico. Catálogo de las plantas vasculares nativas de México. | Revista Mex. Biodivers. | 87(3): 559–902 |
| Mexico | Sinaloa | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Mexico | Sonora | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Mexico | Sonora | | Villaseñor Ríos, J. L. | 2016 | Checklist of the native vascular plants of Mexico. Catálogo de las plantas vasculares nativas de México. | Revista Mex. Biodivers. | 87(3): 559–902 |
| Mexico | Tabasco | | Villaseñor Ríos, J. L. | 2016 | Checklist of the native vascular plants of Mexico. Catálogo de las plantas vasculares nativas de México. | Revista Mex. Biodivers. | 87(3): 559–902 |
| Mexico | Tabasco | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Mexico | Tamaulipas | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Mexico | Tamaulipas | | Villaseñor Ríos, J. L. | 2016 | Checklist of the native vascular plants of Mexico. Catálogo de las plantas vasculares nativas de México. | Revista Mex. Biodivers. | 87(3): 559–902 |
| Mexico | Tlaxcala | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Mexico | Tlaxcala | | Villaseñor Ríos, J. L. | 2016 | Checklist of the native vascular plants of Mexico. Catálogo de las plantas vasculares nativas de México. | Revista Mex. Biodivers. | 87(3): 559–902 |
| Mexico | Veracruz | | Villaseñor Ríos, J. L. | 2016 | Checklist of the native vascular plants of Mexico. Catálogo de las plantas vasculares nativas de México. | Revista Mex. Biodivers. | 87(3): 559–902 |
| Mexico | Veracruz | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Mexico | Yucatán | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Mexico | Yucatán | | Villaseñor Ríos, J. L. | 2016 | Checklist of the native vascular plants of Mexico. Catálogo de las plantas vasculares nativas de México. | Revista Mex. Biodivers. | 87(3): 559–902 |
| Mexico | Zacatecas | | Villaseñor Ríos, J. L. | 2016 | Checklist of the native vascular plants of Mexico. Catálogo de las plantas vasculares nativas de México. | Revista Mex. Biodivers. | 87(3): 559–902 |
| Mexico | Zacatecas | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| Nicaragua | | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| United Kingdom | | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| United States | Arizona | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| United States | California | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| United States | Florida | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| United States | Florida | Collier | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| United States | Florida | Dade | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| United States | Florida | Lake | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| United States | Florida | Monroe | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| United States | Florida | Okaloosa | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| United States | Hawaii | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| United States | Nevada | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| United States | New Mexico | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| United States | Oklahoma | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| United States | Oklahoma | Cimarron | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| United States | Texas | | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| United States | Texas | Brewster | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| United States | Texas | Hartley | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| United States | Texas | Hutchinson | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| United States | Texas | Jeff Davis | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| United States | Texas | Mason | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| United States | Texas | Pecos | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| United States | Texas | Presidio | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| United States | Texas | Real | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| United States | Texas | Reeves | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |
| United States | Texas | Val Verde | Nesom, G. L. | 2005 | Taxonomy of the Symphyotrichum (Aster) subulatum group and Symphyotrichum (Aster) tenuifolium (Asteraceae: Astereae) | Sida | 21(4): 2125–2140 |