Vascular Plants of North Carolina
Account for Rough Mexican-clover - Richardia scabra   L.
Members of Rubiaceae:
Members of Richardia with account distribution info or public map:
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Section 6 » Order Rubiales » Family Rubiaceae
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AuthorL.
DistributionMostly in the Coastal Plain and Sandhills, scarce in the Piedmont and Mountains. Apparently absent from the northeastern portion of the Coastal Plain.

Native of South America; in N.A. NJ to IN south FL and TX.
AbundanceFrequent in the central and southern Coastal Plain and Sandhills, but rare elsewhere.
HabitatDry sandy soil of roadsides, ditches, cropfields, sandhills, campus weed, yard weed, dump.
PhenologyFlowering and fruiting June-October.
IdentificationRough Mexican-clover is very similar to R. brasiliensis, which see. It differs by the leaves which are hairy only on the midrib and margins (vs. hairy on both sides across the whole surface). The stem in this species is hirsute only near the tips, but mostly glabrate to progressively less hairy toward the base; R. brasiliensis has the stems quite hirsute throughout their length.
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Global RankG5
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