Lamourouxia stenoglossa Hunnewell & Smith. Contr. Gray Herb.

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

22. Lamourouxia stenoglossa Hunnewell & Smith. Contr. Gray Herb. 124: 4. 1939. Lectotype designated by Ernst (1972: 39):— MEXICO. Chiapas: Cerro de Huitepeque , 2300 m, 1864–1870, A.B. Ghiesbreght 706 (Lectotype: GH00078585 !; isolectotypes: BM000957991!, K000533724!, MO-155214/A:105229, MO-155213/A:105230, NY90609!, YU066086!)

Figure 14 D–E .

Herbs up to ca. 100 cm tall, stems branched along the plant, erect, woody, pubescent, non-glandular. Leaves opposite, petiolate, petioles 1–2 mm long, lanceolate to elliptic, 22–57 × 9–19.4 mm, margin doubly dentate to doubly serrate, 16–38 teeth each side, teeth ca. 1 mm long; apex acute, base truncate; papyraceous, glabrescent to pubescent, nonglandular. Inflorescence a raceme, erect, pedicels thin, s-shaped, 9–19.5 mm long. Bracts equal along inflorescence, pedicellate, pedicels 1.8–2.4 mm long; lanceolate, 22.3–41 × 7.9–20 mm, margin doubly dentate to doubly serrate, 10– 24 teeth per side, apex acute, base cuneate to rounded. Calyx campanulate without dots on the surface, 6.6–12 × 3.6–6 mm, lobes broadly triangular to ovate, 4.6–6.2 × 2.3–3.8 mm, margin entire, apex acute, pubescent, non-glandular. Corolla funnelform ventricose, 26–46 × 8–12 mm, upper lip 8.9–20 × 7.8–8.5 mm, lower lip 8.4–12 × 1.7–8 mm, lobes 2–3.2 mm × 2–3 mm; orange to red, shortly pubescent, non-glandular. Stamens exserted 4, filaments ca. 40 mm long, anthers 3.5–3.7 mm long. Style 28–34 mm long, stigma bilobed. Capsule ovoid, 11 × 9 mm long. Seeds not seen.

Etymology: —The name stenoglossa means “with a narrow tongue”.

Distribution and Ecology: —This species is distributed in Mexico and Guatemala. In Mexico, the species is recorded in the states of Chiapas, Guerrero, and Oaxaca ( Fig. 14E ). Lamourouxia stenoglossa inhabits cloud forests (with Chiranthodendron pentadactylon Larréategui (1795: 37) , and Saurauia ), pine forests ( Pinus ayacahuite ), oak forests, pine and oak forests, and rarely tropical evergreen forests at elevations from 1750 to 3000 m.

Phenology: —Flowering and fruiting season occur from July to January.

Examined specimens: — MEXICO. Chiapas: Cacahoatán, Ejido Agua Caliente, Volcán Tacaná , 2056 m, 06 January 2012, Hernández 3491 ( MEXU!) . Motozintla, on the north and west slope of Cerro Mozotal below the microwave along the road from Huixtla to El Porvenir and Siltepec , 18 November 1971, Breedlove & Smith 22810 ( MEXU!) . Oxchuc, a 300 m del desvío de Cholol camino a Rancho El Cura , 19 October 1994, Chamé & Gutiérrez 525 ( MEXU!) . San Cristóbal de las Casas, Cerro Huitepec , al W de San Cristóbal, 25 September 1984, Méndez 7983 ( IBUG!, XAL!) ; northeast slope of Zontehuitz near summit, 20 September 1965, Breedlove 12349 ( MEXU!, US!) ; southwest of Mexican highway 190 near Rancho Nuevo, about 9 miles southeast of San Cristóbal , 20 August 1966, Breedlove 15127 ( MEXU!, US!) ; Cerro Huitepec , 05 December 1971, Breedlove 23041 ( ENCB!) ; west side of Zontehuitz near Summit , 17 October 1981, Breedlove 53597 ( ENCB!) . San Juan Chamula, slopes on southeast side of Zontehuitz near Summit , 30 July 1964, Breedlove 6706 ( ENCB!) . Tenejapa, northeast side of the hill called Matsab [Matzam], 25 August 1966, Breedlove 15282 ( MEXU!) ; Paraje Kurus ch’en, 29 September 1972, Breedlove 28220 ( ENCB!) ; 22 km from San Cristóbal de las Casas on the road to Tenejapa , then right 3 km on the road to Matzam , 29 September 1984, Huft et al. 217 ( MEXU!) . Zinacantán, near the Summit of Muktavits ( Cerro Huitepec ), 19 November 1981, Breedlove & Bartholomew 55585 ( MEXU!) . Southwest of route 15, ca. 14 km southeast of San Cristóbal de las Casas , 20 August 1966, Cruden 1209 ( MEXU!) . Guerrero: Chichihualco, 15 km al E de Puerto de Gallo, carr. Filo de Caballo , 3090 m, 18 August 1982, Tenorio et al. 1420 ( ENCB!, XAL!) . Oaxaca: Santiago Zacatepec, 19 km al W de Zacatepec Mixes, cerca de La Cascada , 1960 m, 27 October 1993, Acosta 2384 ( XAL!) .

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.