Pseuderanthemum praecox (Benth.) Leonard

Daniel, Thomas F., García-Morales, Leccinum J. & Mora-Olivo, Arturo, 2021, Taxonomic and Photographic Guide to the Acanthaceae of Tamaulipas, Mexico, Proceedings of the California Academy of Sciences 67 (6), pp. 185-228 : 213

Pseuderanthemum praecox (Benth.) Leonard

PHENOLOGY.— Flowering: April; fruiting: unknown.

DISTRIBUTION.— Mexico (Ags., Chis., D.F., Dur., Gto., Gro., Hdo., Jal., Méx., Mich., Mor., Nay., N.L., Oax., Pue., Qro., S.L.P., Sin., Son., Tamps., Zac.)

HABITAT.— Unknown.

ELEVATION.— 1500 meters.

NOTES.— Daniel (1995) and Daniel and Acosta C. (2003) provided descriptions of this species ( Fig 3H ). Although apparently known by a single collection from Tamaulipas, plants were noted to be ʺWidespread but scattering on tops of mts.” In other parts of its geographic range (e.g., Sonora, Daniel 2004), plants produce chasmogamous flowers after most or all leaves have fallen, followed by leafy stems with cleistogamous flowers. A group of species and names that includes P. praecox , P. hispidulum (Nees) Radlk. , P. axillare Leonard , and P. biceps Lindau has not been completely sorted out (cf. Daniel and Acosta C. 2003); some of these appear to be represent growth forms of a widespread P. praecox .

REPRESENTATIVE SPECIMENS.— Santa Rita Ranch, R. Runyon 1053 ( TEX, US).

Figures

FIGURE 3. Tamaulipan Acanthaceae III. A, B. Hygrophila corymbosa. C. Hygrophila polysperma. D. Louteridium tamaulipense. E. Mirandea andradenia. F. Mirandea grisea. G. Pseuderanthemum alatum. H. Pseuderanthemum praecox. Photos by T. Daniel (G, H), L. García-Morales (F), C. Kiel (E), A. Northup, public domain, CC0 1.0 Universal (A, B), A. Mora-Olivo (D), S. Winterton, Aquarium and Pond Plants of the World, Ed. 3, USDA APHIS PPQ, Bugwood.org, cropped, CC- By-NC-3.0 (C).