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Digitaria clarkei (Paniceae, Panicoideae, Poaceae) a new species with paniculate synflorescence and D. costaricensis a new record from Mexico

. Phytotaxa. 321, 1 (Sep. 2017), 125–138. DOI:https://doi.org/10.11646/phytotaxa.321.1.6.