Vascular Plants of North Carolina
Account for Larkspur-leaf Tickseed - Coreopsis delphiniifolia   Lamarck
Members of Asteraceae:
Members of Coreopsis with account distribution info or public map:
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Section 6 » Order Asterales » Family Asteraceae
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DistributionSERNEC (misspelled delphinifolia) has specimens from Moore and Scotland counties. RAB (1968) lumps it within C. major var. stellata, but FNA and Weakley (2020) recognize it at the species level, although FNA says "questionably distinct from C. major". As Weakley (2020) accepts it as a valid species and with natural occurrences in the state, the taxon editors accept it here as native, though feel that molecular research needs to be done before truly accepting it as a valid species. Smith (1976) in his monograph treated it as of hybrid origin; DNA research is sorely needed to settle the matter.

Southeastern VA to central GA and southeastern TN.
AbundanceVery rare in the Sandhills region; unknown elsewhere. Oddly, the NCNHP has a State Rank of just SNR (not yet ranked); the website editors suggest an uncertain rank of [S1S2], as it is globally rare and presumably scarce in NC. The editors also suggest a State Status of W2 = "Rare but Questionable Taxonomy" as the proper Watch List category, and not W3 = "Rare but Questionable Documentation".
Habitat"Dry woodlands" (Weakley 2020). The 2022 populations in Moore County occurred on roadsides and just within dry woodlands.
PhenologyFlowers and fruits May to July.
IdentificationPlants appear to be a narrow-leaflet form of Greater Tickseed (Coreopsis major). In 2021 a sizable population of narrow-leaflet plants was found at Calloway Preserve in Hoke County by BA Sorrie. Leaflets measured 4-9 mm wide. However, no leaflets showed any tendency to lobing or dessecting, and so were identified as C. major. See drawings in Smith"s Monograph (Sida 6: 175). In 2022 two populations were found in Moore County, in which most plants had some pinnatifid leaflets. These (see photo below) most closely resembled Fig. 28E of Smith, which he said is "material approaching C. xdelphinifolia". Thus, it may be that the 2022 plants represent backcrosses between delphiniifolia and major.
Taxonomic CommentsSee comments above.

For excellent drawings of all species (except those recently described) and range maps (although now out-of-date), see the monograph by Smith (1976).
Other Common Name(s)Larkspur Coreopsis
State RankSNR [S1S2]
Global RankG3?
State StatusW3 [W2]
US Status
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B.A. SorrieSoutheastern Moore County, Woodwind Drive, 11 July 2022. MoorePhoto_natural

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