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Key to Thelesperma
https://fsus.ncbg.unc.edu/main.php?pg=show-key.php&keyid=40962
5 Calyculus of bractlets, 5-6 (-9), linear to narrowly triangular, with margins hispido-ciliate; cypselas 3.5-4 mm long | |
5 Calyculus of bractlets, 6-7+, narrowly triangular, with margins not ciliate; cypselas 5-5.5+ mm long | |
7 Plants 25-70+ cm tall; rays golden yellow; outer phyllaries mainly > 1/2 as long as the inner phyllaries | |
7 Plants 20-30 (-40) cm tall; rays medium yellow; outer phyllaries mainly ca. 1/2 as long as the inner phyllaries |