| Section 6 » Family Ceratophyllaceae |
Show/Hide Synonym
| taxonName | relationship | relatedTaxonName | relatedTaxonRefText | relComments |
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| Ceratophyllum australe | = | Ceratophyllum muricatum ssp. australe | Flora of North America (1993b, 1997, 2000, 2002a, 2002b, 2003a, 2004b, 2005, 2006a, 2006b, 2006c, 2007a, 2009, 2010) | | | Ceratophyllum australe | = | Ceratophyllum muricatum ssp. australe | | | | Ceratophyllum australe | = | Ceratophyllum muricatum ssp. australe | | | | Ceratophyllum australe | = | Ceratophyllum muricatum ssp. australe | Wunderlin & Hansen Flora of Florida (3) | | | Ceratophyllum australe | = | Ceratophyllum muricatum ssp. australe | Les in Kubitzki, Rohwer, & Bittrich (1993). Key adapted from Les. | | | Ceratophyllum australe | < | Ceratophyllum muricatum | Godfrey and Wooten (1979, 1981) | | | Source: Weakley's Flora |
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| Author | Grisebach | |
| Distribution | Outer Banks and outer Coastal Plain. So far known from Carteret County (specimen at NCU, collected in 1960), Currituck County (specimen at ODU in 1991), and Chowan County (NCNHP report).
Coastal Plain, NC to southern FL; W.I., Mex., C.A., S.A. | |
| Abundance | Apparently very rare, with only 3 known reports from the state. This is a Significantly Rare species. | |
| Habitat | The Carteret County specimen reads "pool in woods, south end of Bogue Barrier." The Currituck specimen reads "drainage ditch in front of Good Hope Church, just south of Tulls Creek." The Chowan County record is from pools of a tributary stream whose flow has been blocked by sand bars. |
| Phenology | Flowering and fruiting May-September. | |
| Identification | The two specimens were originally determined as C. echinatum, but differ from that species by larger seed body (4.5-6 mm vs. 3-4.5 mm). From C. demersum they differs in having lax, fine-textured leaves that are forked 3-4 times (vs. stiff, coarse-textured leaves forked 1-2 times). | |
| Taxonomic Comments | Formerly treated as C. muricatum ssp. australe or C. floridanum.
Hornworts/Coontails (genus Ceratophyllum) are submersed aquatic plants with long stems and branches. Leaves are very slender, linear, forked, and are arranged in whorls of 3-11 leaves. Tiny flowers and fruits occur at some leaf bases. Plants superficially resemble water-milfoils, but leaves of milfoils are pinnately dissected into many segments, not merely forked. | |
| Other Common Name(s) | None | |
| State Rank | S1 | |
| Global Rank | G5TNR [G5] | |
| State Status | SR-P | |
| US Status | | |
| USACE-agcp | | |
| USACE-emp | | |
