Justicia durangensis (Henr. & Hilsenb.) T.F. Daniel, 2017

Daniel, Thomas F., 2017, New and Reconsidered Mexican Acanthaceae XII, Proceedings of the California Academy of Sciences 64 (7), pp. 131-154 : 152

Justicia durangensis (Henr. & Hilsenb.) T.F. Daniel , comb. nov.

Siphonoglossa durangensis Henr. & Hilsenb. , Brittonia 31: 375. 1979. TYPE.— MEXICO. Durango: ca. 24 mi SW of Torreón, 7.1 mi W of Hwy. 40 on road to Presa Francisco Zarco along Río Nazas , ca. 25°16ʹN, 103°45ʹW, 1200 m, 15-VIII-1973, J . Henrickson 12422 B (holotype: TEX) .

DISCUSSION.— American species of Siphonoglossa Oerst. are now usually treated in Justicia L. (e.g., Graham 1988; Daniel 1995; Kiel et al. 2017). Justicia durangensis appears to be a distinct species as described and discussed by Henrickson and Hilsenbeck (1979) and Hilsenbeck (1983). Corollas 13.5 to 16. 5 mm long were noted for the species by Henrickson and Hilsenbeck (1979). Smaller flowers (e.g., open corollas 5–9 mm long) on specimens collected in late September and October (e.g., Henrickson 22729 at CAS and TEX, and González et al. 7012 at CAS) likely represent reduced flowers (possibly transitioning to cleistogamous flowers) occurring late in the season. If true, a similar seasonal dimorphism has been observed in corollas of J. longii Hilsenb. ( Daniel 2016), another species formerly treated as pertaining to Siphonoglossa .