Lamourouxia avendanoi Francisco-Gutiérrez. Phytotaxa, 2022

Francisco-Gutiérrez, Antonio, Ruiz-Sanchez, Eduardo, González, Dolores & Lira-Noriega, Andrés, 2023, Lamourouxia (Orobanchaceae) of Mexico, Phytotaxa 582 (1), pp. 1921-1935 : 1921-1935

1. Lamourouxia avendanoi Francisco-Gutiérrez. Phytotaxa 549(1): 54. 2022. Type:— MEXICO. Nayarit: Nayar [Zacatecas: Valparaíso], 50 km al NE de Jesús María, carr. a Huejuquilla , 2000–2230 m, 13 September 1989, P. Tenorio-Lezama & G. Flores-Franco 16022 (Holotype: MEXU000520487 !)

Figure 4 A–D .

Herbs 40–60 cm tall, stems solitary, erect, woody, hirsute, non-glandular. Leaves sessile, elliptic, broadly elliptic to oblong, 24–56 × 17–29 mm, margin dentate to crenate, 6–16 teeth per side, teeth 0.5–3.3 mm long; apex acute to obtuse, sometimes short-acuminate, base rounded; coriaceous, pilose with non-glandular trichomes. Inflorescence a raceme, erect, pedicels thin, 0.8–3.3 × 1 mm. Bracts equal along inflorescence, sessile, obovate to ovate, 8–25 × 3–20 mm, margin dentate, up to 7 teeth per side, teeth 0.5–2 mm long, apex acute, base rounded. Calyx campanulate without dots on the surface, 4.3–13 × 3.9–6 mm, lobes triangular, 2.6–7 × 1.1–4.4 mm, margin entire, apex acute, pubescent with non-glandular trichomes. Corolla tubular, 27–54 × 6–10 mm, upper lip 14–30 mm long, lower lip 7–24 × 2 mm, lobes 1.1–3.3 × 0.9 mm; pink or red, pubescent to shortly hirsute, non-glandular. Stamens exserted 2, filaments of lower pair 35–38 mm long, anthers ca. 3.4 mm long, filaments of upper pair not seen. Style 37–47 mm long. Stigma capitate, 1–1.4 × 0.9 mm. Capsule ovoid, 8.3–9.8 × 5.4–6 mm, glabrous. Seeds not seen.

Etymology: —The epithet honors Sergio Avendaño-Reyes, a Mexican botanist.

Distribution and Ecology: —The species is restricted to tropical deciduous forests, oak, and pine-oak forests of the Sierra Madre Oriental at elevations from 1325 to 2450 m. It is distributed in the states of Durango, Jalisco, Nayarit, and Zacatecas ( Fig. 4E ). Associated with Eysenhardtia polystachya ( Ortega 1798: 66) Sargent (1892: 29) , Acacia angustissima ( Miller 1768: s.n.) Kuntze (1898: 47), Pinus oocarpa Schiede ex Schlechtendal (1838: 491–492) , Calliandra houstoniana ( Miller 1768: s.n.) Standley (1922: 386), and Bursera Jacquin ex Linnaeus (1762: 471) spp.

Phenology: —Flowering and fruiting from July to October.

Examined specimens: — MEXICO. Durango: El Salto, Pie de Cuesta 4 km al S de Pueblo Nuevo, 1860 m, 02 July 1984, Tenorio et al. 6169 ( MEXU!, US!) ; Mezquital, Aprox. 4 km de La Guajolota , 11 September 1985, Solís 257 ( MEXU!) ; Pueblo Nuevo, La Yerbabuena, comunidad San Bernardino de Milpillas , 2280 m, 26 September 1981, Pérez 797 ( ENCB!) ; Toyaltita, Carboneras 54 km al SW de San Miguel de Cruces, brecha a Toyaltita , 1800 m, 06 July 1984, Tenorio et al. 6246 ( MEXU!, US!) . Jalisco: Bolaños, cañada 1.5 km al O de Las Berenjenas, 2 a 3 km al W de Las Berenjenas o de 7 a 8 km al W del crucero, 1800–2000 m, 02 July 1996, Calónico-Soto & Flores-Franco 2470 ( IBUG!, MEXU!) ; camino crucero de Banderitas-Tuxpan de Bolaños, Sierra de Bolaños , 2450 m, 06 July 1996, Calónico-Soto & Flores-Franco 2505 ( MEXU!, IBUG!) , 29 October 2020, Ortiz-Brunel et al. 995, 996 ( IBUG!) . Nayarit: El Nayar, Arroyo de La Taberna northwest of Mesa del Nayar , 1325 m, 13 August 1980, Breedlove & Almeda 45556 ( MEXU!) .

Zacatecas: [Valparaíso] 31 km al NE de Jesús María, camino Jesús María-Huejuquilla, 1430 m, 27 July 1990, FloresFranco et al. 2103 ( MEXU!); 50 km al NE de Jesús María, carr. a Huejuquilla, 2000–2230 m, 13 September 1989, Tenorio & Flores-Franco 16022 ( MEXU!).

Figures

FIGURE 4. Lamourouxia avendanoi. A–B) inflorescences of live specimens. C) Inflorescence of a dry specimen. D) Distribution map. Lamourouxia barbata. E) Inflorescence. F) Leaves. G) Habit. H) Distribution map. Credits in Appendix I.