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Dalea rupertii is proposed as new. It differs from previously known species in having calyx teeth with both spurred (1–2) and blister glands (4–6), and leaves 7–17 mm long, bearing 4–5 pairs of leaflets. It is known only from the southern portion of the state of Durango, Mexico. A description, a comparative table, and an illustration are provided.
Resumen
Dalea rupertii es propuesta como nueva especie. Difiere de las especies previamente conocidas por la presencia de glándulas tanto espueliformes (1–2), como ampulosas (4–6) en los dientes del cáliz, hojas cortas de 7–17 mm largo y 4–5 pares de folíolos. Sólo se conoce de la región sur del estado mexicano de Durango. Se presentan una descripción, tabla comparativa e ilustración.