Lamourouxia pacifica Francisco-Gutiérrez & Ruiz-Sanchez. 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

16. Lamourouxia pacifica Francisco-Gutiérrez & Ruiz-Sanchez. Phytotaxa 549(1): 58. 2022. Type:— MEXICO. Jalisco: Cabo Corrientes, km 176 on road from Puerto Vallarta to Manzanillo , 701 m, 23 February 2019, A. FranciscoGutiérrez & R. Rosas-Campos 251 (Holotype: XAL0105794 !)

Figure 11 D–H .

Herbs up to 200 cm tall, stems solitary or scarcely branched near the base, erect, herbaceous, pubescent to hirsute, glandular. Leaves, sessile, linear to narrowly linear-lanceolate, 38–138.2 × 8–25 mm, margin serrate, 6–16 teeth per side, 0.5–3.3 mm long; apex acute, base truncate; membranous, adaxially pubescent to scarcely hirsute with simple and glandular trichomes, abaxially pubescent with simple and glandular trichomes. Inflorescence a raceme, erect, pedicels thin, 1–9 mm long. Two types of bracts. Upper bracts triangular to lanceolate, 5–23 × 2–10.4 mm, margin entire, apex acute, base rounded. Lower bracts linear to narrowly lanceolate, 17–37 × 6–8 mm, margin serrate with up to 11 teeth per side, teeth up to 1 mm long, apex acute, base slightly auriculate. Calyx campanulate without dots on the surface, 3.2–10 × 3–7 mm, lobes triangular, margin entire, 2–7 × 1.5–4 mm, apex acute, glandular-pubescent. Corolla tubular 15–46 × 3–6.2 mm, bilobed, upper lip 7–23 × 5–10 mm, lower lip 7–17 × 3–5.1 mm, lobes 3.5 × 1.5–1.9 mm; pink to purple, pubescent, non-glandular. Stamens exserted 2, filaments of lower pair 36–43 mm long, anthers 3–3.5 mm long, filaments of upper pair 17 mm long, anthers absent. Style 33–44 mm long, stigma capitate, 0.9–1.2 × 1 mm. Capsule elliptic to ovoid, 8.2–12 × 4–8 mm, glabrous. Seeds 1.2–1.3 × 0.5–0.7 mm, with reticulate coat.

Etymology: —The name of the species refers to its distribution close to the Pacific Ocean.

Distribution and Ecology: —The species is endemic from Mexico and is distributed in the northern and western states of Durango, Jalisco, Nayarit, and Sinaloa ( Fig. 11H ). This species occurs at elevations from 300 to 2930 m in oak and pine-oak forests.

Phenology: —Flowering from November to May. Fruits collected from February to April.

Examined specimens: — MEXICO. Durango: Tamazula, La Bajada, 1750 m, November 1922, González-Ortega 563 (MEXU!). Jalisco: Ayotitlán, al NNE de Ayotitlán, 1320 m, 26 February 1987, Alcocer et al. 242 (IBUG!). Cabo Corrientes (El Tuito), alrededores de La Báscula, por el camino a El Cuale, 815 m, 24 February 1993, Castillo-Campos et al. 10281 (XAL!); La Puerta, 500 m, 27 February 1993, Castillo-Campos et al. 10489 (XAL!); Carretera Puerto Vallarta - El Tuito km 178, 700 m, 06 March 2021, García et al. 338, Ortiz-Brunel et al. 1058 (IBUG!); camino El Tuito—minas de Zimapán, 820 m, 06 March 2021, Ortiz-Brunel et al. 1059 (IBUG!). Jocotepec, vereda del Filo al SE de la Bola del Viejo, 2870 m, 29 March 1997, Machuca 7985 (IBUG). La Huerta, El Puerto Colorado, 5–6 km por línea recta al N de La Huerta , 650–680 m, 29 December 1994, Cuevas et al. 4862 (IBUG!). Ojuelos, Mesa El Toro al W de Ojuelos, acceso por Vaquerías, brecha al N y NE, por el cauce del A. Capulín, 2958 m, 08 September 2002, Machuca et al. 8877 (IBUG!). Talpa de Allende , camino Talpa —El Desmoronado, 16 km después de Talpa, 1335 m , 30 January 2022, Ortiz-Brunel & Ruiz-Sánchez 1353 (IBUG!). Tecalitlán, Sierra del Halo, predio Las Palomas y Los Fresnos, 12 km en línea recta al E de Pihuamo, 3.5 km al O de Alotitlán, alrededores del Puerto de Ortiz, 1750 m , 22 April 2012, Castro-Castro et al. 2789 (XAL!). Nayarit: Tepic, 1 km al SW de El Cuarenteño camino a El Cora o 4 km al N del entronque del camino El Cora-Papapitas, 820 m, 16 May 1994, Flores-Franco et al. 3458 (MEXU!); W-SW flank of Volcan Sanganguey, track from highway to Guadalajara ca. 6 km SE of San Cayetano, 1400 m, 13 January 1993, Mayfield et al. 1657 (MEXU!); Las Tierritas, 2 km al NE del Izote, Cerro San Juan, 1200 m, 23 March 1989, Tenorio et al. 15610 (MEXU!). Tuxpan, 1.5 km al S aproximadamente, 22 September 1979, Martir-Velázquez s.n. (IBUG!).

Sinaloa: Mesa Malqueson, Cerro Colorado, 762 m, 08 December 1939, Gentry 5168 ( MEXU!) .

Figures

FIGURE 11. Lamourouxia ovata. A) Inflorescence in the field. B) Dry leaves. C) Distribution map. Lamourouxia pacifica. D, E) Inflorescence. F) Leaves. G) Habit. H) Distribution map. Credits in Appendix I.