Lamourouxia smithii Robinson & Greenman. Amer. J. Sci. Arts, 1895

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

21. Lamourouxia smithii Robinson & Greenman. Amer. J. Sci. Arts , ser. 3 50: 172. 1895. Type:— MEXICO. Oaxaca: Mountains of Jayacatlan , 5000 ft., 13 August 1894, L.C. Smith 155 (Holotype: GH00078584 !)

Figure 14 A–C .

Herbs up to 100 cm tall, stems branched along the plant, erect, woody, hirsute, non-glandular. Leaves sessile, ovate to triangular, 50–72 × 29–38 mm, margin dentate to serrate, sometimes doubly serrate, 12–17 teeth per side, teeth 2–6 mm long; apex acute, base cordate; apparently papyraceous, glabrous. Inflorescence a raceme, erect, pedicels thin, 2.9–5.4 mm long. Bracts equal along inflorescence, sessile, ovate to oblong, 13–25 × 7.7–10.6 mm, margin serrate, 8–11 teeth each side, apex acute, base cordate. Calyx campanulate without dots on the surface, 9.3–12.5 × 4.1–6 mm, lobes triangular to narrowly ovate or slightly subulate, 3.3–5.8 × 1.9–2.7 mm, margin entire, apex acute, pubescent, non-glandular. Corolla tubular, 39–54 × 6.9–8.6 mm, upper lip 18–24 × 64– 7.4 mm, lower lip 14–19 × 2–2.6 mm, lobes 0.9–1.4 × 0.9–1.3 mm; red, pubescent, non-glandular. Stamens exserted 2, filaments of lower pair ca. 40 mm long, anthers 3.6 mm long, filaments of upper pair not seen. Style 44–52 mm, stigma bilobed, 1 mm long. Fruits and seeds not seen.

Etymology: —The name honors L.C. Smith, collector of the type specimen.

Distribution and Ecology: —The species is endemic from the states of Guerrero and Oaxaca, Mexico ( Fig. 14C ). The species can be found in pine and oak forests, pine forests, and rarely in tropical deciduous forests, and xerophytic scrubs ( Pseudosmodingium Engler (1881: 381) , Bursera , Esenbeckia Kunth in Humboldt et al. (1825: 246–248) at elevations from 1240 to 1960 m.

Phenology: —Flowering extends from June to January.

Representative specimens: — MEXICO. Guerrero: Leonardo Bravo, 4 km al NE de El Naranjo, rumbo a Chichihualco , 1240 m, 30 October 1997, González 1762 ( MEXU!) . Malinaltepec , 1700 m, 15 January 1992, Wagenbreth 801 ( MEXU!) . Oaxaca: Ixtlán de Juárez, Sureste del río Natividad , cerca del puente de piedra, 1850 m, 14 August 2002, Figueroa & Guzmán 86 ( MEXU!) ; Cerro El Campanario , a 3.6 km en LR (263º) de Kacaltianguis, 1929 m, 20 December 2009, Velasco & Juárez 4391 ( MEXU!) . San Bartolomé Quialana, Parte baja del cerro Yuubidan , a 0.5 km al lado E del paraje La Toma, 1961 m, 20 July 2013, Aragón-Parada 366 ( MEXU!) . San Lorenzo Albarradas, 6.2 km al NE de Mitla, carr. a Totontepec , 1690 m, 01 August 1983, Torres-Colín & Hernández 3390 ( MEXU!) . San Pedro y San Pablo Ayutla, 4.7 km al NE de San Bartolo Albarradas camino a Totontepec , 1600 m, 07 August 1985, TorresColín et al. 7022 ( MEXU!) . Santa Catarina Cuixtla , 5 km al SW de Miahuatlán, cerca de Cuixtla, 1900 m, 13 June 1985, Torres-Colín & García-Mendoza 6804 ( MEXU!) . Valerio Trujano, Tomellin Canyon , 17 July 1897, Pringle 6705 ( MEXU!, US!).

Figures

FIGURE 14. Lamourouxia smithii (Smith 155). A) Detail of inflorescence. B) Leaves. C) Distribution map. Lamourouxia stenoglossa (isotype, Ghiesbreght 706). D) Inflorescence. E) Leaves. F) Distribution map. Lamourouxia tenuifolia (Conzatti 965). G) Inflorescence. H) Distribution map. Credits in Appendix I.