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| Dalea verticillata Cruz Durán, D. Sandoval & García-Mend., in Durán, Gutiérrez et Mendoza, 2023. |
Abstract
Dalea verticillata is described and illustrated as a new species from Oaxaca, Mexico. Dalea verticillata is similar to D. filiciformis, but it is distinguished by having whorled leaves (vs. alternate in D. filiciformis), with a greater number of leaflets ((31–)39–63(–69) vs. (11–)13–29(–37)), longer stipules (4.5–8 mm vs. 0.3–1.5 mm), reflexed (vs. ascending), persistent (vs. deciduous), terminal panicle inflorescences (vs. axillary racemes), and the wing petals subelliptic (vs. ovate). This is the second species of the hitherto monospecific subgenus Psoropteris, and the whorled-leaf character is recorded for the first time in the genus Dalea.
Keywords: Dalea, Amorpheae, subgenus Psoropteris, flora, Oaxaca, Mexico
Dalea verticillata Cruz Durán, D. Sandoval & García-Mend., sp. nov.
Diagnosis.— Dalea verticillata is similar to D. filiciformis, however it is distinguished from that species by having whorled leaves (vs. alternate in D. filiciformis), with a greater number of leaflets ((31–)39–63(–69) vs. (11–) 13–29 (–37)), longer stipules (4.5–8 mm vs. 0.3–1.5 mm), reflexed (vs. ascending), persistent (vs. deciduous), terminal panicle inflorescences (vs. axillary racemes), and the wing petals subelliptic (vs. ovate).
Etymology.— The specific epithet refers to the whorled arrangement of the leaves, a unique character within the genus Dalea.
Ramiro Cruz Durán, Daniel Sandoval Gutiérrez and Abisaí García Mendoza. 2023. [Dalea verticillata (Leguminosae, Papilionoideae, Amorpheae), una nueva especie de Oaxaca, México y segunda para el subgénero Psoropteris] Dalea verticillata (Leguminosae, Papilionoideae, Amorpheae), A New Species from Oaxaca, Mexico. Brittonia. DOI: 10.1007/s12228-023-09768-6
