| Section 6 » Family Asteraceae |
Show/Hide Synonym
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| Eupatorium cordigerum | = | Eupatorium rotundifolium var. cordigerum | Gleason and Cronquist (1991) | | | Eupatorium cordigerum | = | Eupatorium rotundifolium var. cordigerum | Kartesz (1999) | | | Eupatorium cordigerum | = | Eupatorium rotundifolium var. cordigerum | Vascular Flora of the Southeastern States (Cronquist 1980, Isely 1990) | | | Eupatorium cordigerum | = | Eupatorium ×cordigerum | Flora of North America (1993b, 1997, 2000, 2002a, 2002b, 2003a, 2004b, 2005, 2006a, 2006b, 2006c, 2007a, 2009, 2010) | | | Eupatorium cordigerum | > | Eupatorium rotundifolium var. ovatum | Gleason (1952) | | | Eupatorium cordigerum | > | Eupatorium rotundifolium var. ovatum | Radford, Ahles, and Bell (1968) | (also see E. pubescens) | | Eupatorium cordigerum | < | Eupatorium rotundifolium | Godfrey and Wooten (1979, 1981) | | | Eupatorium cordigerum | < | Eupatorium pubescens | Small (1933, 1938) | | | Source: Weakley's Flora |
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| Author | (Fernald) Fernald | |
| Distribution | Poorly known to most botanists, and the range is not fully fleshed out owing to taxonomic issues. Widely scattered over the Piedmont and Coastal Plain and the southern Mountains. However, as the species ranges south to SC and northern FL, it should be more widely present in the southern half of the state than the map shows.
FNA shows a range of NJ, VA, NC, SC, MS, AR. Weakley (2024) says "VA, NC, and SC west to AR and MS". | |
| Abundance | Very little idea of abundance owing to the recent split and thus poorly known. If the SERNEC specimens can be trusted, and with 16 county records scattered over the state, it might be uncommon or infrequent, as opposed to rare. The website editors have assigned a State Rank of S3? for the present time. NatureServe lists the taxon as a variety of E. rotundifolium, with a rank of G5TNR (taxon not ranked). Thus, if a full species, it would be given a global Rank of GNR. | |
| Habitat | Woodland margins in moist soil. More habitat information needed. | |
| Phenology | Flowering and fruiting late July-October. | |
| Identification | Plants grow to 3-4 feet tall, with sessile, rough-textured, pubescent leaves, with clasping leaf bases. Both parents may occur nearby. At first glance, it may look like E. rotundifolium but with somewhat less rounded leaves than that species; look for the clasping leaf bases. The leaves also tend to look wrinkled and not in a single plane. E. pubescens also has sessile to clasping, ovate leaves, but the leaves are not obviously clasping and the leaves in that species are less rotund or widely ovate than in E. cordigerum and also look less wrinkled as well. | |
| Taxonomic Comments | This species is "an apomictic polyploid hybrid of E. rotundifolium and E. perfoliatum" (FNA). A synonym is E. rotundifolium var. cordigerum.
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| Other Common Name(s) | Clasping Roundleaf Eupatorium | |
| State Rank | [S3?] | |
| Global Rank | [GNR] | |
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| USACE-emp | | |
