Tetramerium nervosum Nees

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 : 217

Tetramerium nervosum Nees

PHENOLOGY.— Flowering: February–December; fruiting: March–December.

DISTRIBUTION.— U.S.A. (Ariz., N.M., Tex.), Mexico (Ags., B.C.S., Camp., Chih., Chis., Coah., Col., Dur., Gro, Gto., Hgo., Jal., Méx., Mich., Mor., Nay., N.L., Oax., Pue., Qro., Q.R., S.L.P., Sin., Son., Tamps., Ver., Yuc., Zac.), Central America, South America.

HABITAT.— Tropical deciduous forest, oak woodland and forest, disturbed sites, often on limestone

ELEVATION.— 400–1360 meters.

NOTES.— Daniel (1986b, 1995) and Daniel and Acosta C. (2003) provided descriptions of Tetramerium nervosum . Daniel (1986b) discussed morphological variation of the species throughout its geographic range. Flowers vary in color from white to cream to yellow. Yellow corollas ( Fig. 5H ) appear to be most prevalent in Tamaulipas. Many collections have been identified with the synonym T. hispidum Nees.

REPRESENTATIVE SPECIMENS.— 52 mi N of Valles , F. Barkley 17M054 (F, TEX) ; Sierra de San Carlos , Cañón La Tamaulipeca , H. Bartlett 10709 ( DS, F, MICH, SD, US); San José, Sierra San Carlos, O. Briones V. 1671 (MEXU-image); along Hwy. 101 S of Cd. Victoria, 1.3 mi S of bridge over Río San Marcos , T. Daniel & M. Baker 3687 ( CAS) ; Sierra de Tamaulipas , ca . 40 km NNW of Aldama , near Paso Lajas, R. Dressler 2323 ( GH, MICH, MO) ; W of Antiguo Morelos toward El Salto, D. Dunn & D. Dunn 19216 ( ENCB, NY) ; 7 mi W of jct. Hwy. 80 & 85 on Hwy. 80 in Antiguo Morelos , D. Dunn & Harmon 17617 ( ASU) ; along Hwy. 85, 34 mi S of Cd. Victoria , D. Dunn et al. 23108 ( ENCB, MO, MSC, NY) ; Mpio. Victoria, Altas Cumbres, carr. Victoria – Jaumave, L. García-Morales 259 ( ITCV) ; Mpio. Victoria, El Madroño, carr. Victoria – Jaumave, L. García-Morales 459 ( ITCV) ; Mpio. Victoria , 3 km E de El Huizachal , L. García-Morales 2444 ( ITCV) ; Mpio. Victoria, KM 2 Cañón de La Peregrina, L. García-Morales 4828b ( ITCV) ; 1.5 km N de Santuario del Caminero, carr. Victoria – Altas Cumbres, L. García-Morales 4948 ( ITCV) ; Mpio. Villagrán, Rancho 3 de Marzo, L. García-Morales s.n. ( ITCV) ; Mpio. Aldama , Ejido el Nacimiento, “Pozos de la Azufrosa,” 22°59ʹ30ʺN, 098°09ʹ55ʺW, M. González G. 256 (MEXUimage); Mpio. Victoria, KM 20 al S de Cd. Victoria, “Altas Cumbres,” L. Hernández 1515 (MEXU-image); Mpio. Hidalgo, El Mirador, Hinton et al. 25031 (MEXU-image) ; 11 mi SW of Victoria on rd. to Huisachal , Lauber, Taylor & Stanford 19 76 ( US); Mpio. San Carlos , 2 km E de Marmolejo en el camino a Rosario, 24°37ʹN, 099°01ʹW, M. Martínez & J. Martínez 2188 ( XAL) ; Mpio. Villa Mainero , Las Peñitas , 4 km W de La Oveja , en el camino a Camarones, F. Medrano & P. Hiriart 12957 ( MEXU) ; Mpio. Hidalgo , 31 km W de El Carmen , F. Medrano et al. 13878 ( MEXU) ; Río San Marcos , 5 mi W of Cd. Victoria, F. Meyer & D. Rogers 2597 ( US); Mpio. Cd . Victoria , SE outskirts of Cd. Victoria, M. Nee 22214 ( XAL) ; vic. of Victoria , E. Palmer 86 (F, GH, K, MO, NY, UC, US) ; 11 mi SW of Victoria toward Huizachal, L. Stanford et al. 1976 ( DS, RSA, UC, US); Sierra Madre Oriental , 20.5 (rd.) mi SW of Cd. Victoria , R. Worthington 8460 ( ASU) ; Jaumave, H. Viereck 290 ( US); Cañón de la Peregrina, Ejido La Libertad, Río San Felipe, M. Yáñez N-146 ( MEXU) .

Figures

FIGURE 5. Tamaulipan Acanthaceae V. A. Ruellia blechum. B. Ruellia ciliatiflora. C. Ruellia hookeriana. D. Ruellia paniculata. E. Ruellia simplex (blue-flowered form). F. Ruellia simplex (white-flowered form). G. Stenandrium dulce. H. Tetramerium nervosum. I Thunbergia fragrans. J. Thunbergia alata. K. Yeatesia mabryi. L. Yeatesia platystegia. Photos by T. Daniel (A, C–G, I, J), E. Fernández, cropped, CC BY-NC 4.0 (H), L. García-Morales (B, K), B. Leander, used with permission from the Lady Bird Johnson Wildflower Center (L).