Lamourouxia longiflora Bentham. Pl. Hartw.

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

10. Lamourouxia longiflora Bentham. Pl. Hartw. 22. 1839. Lectotype designated here:— MEXICO. In Mexico pr. Bolanos [Bolaños], K.T. Hartweg 188 (Lectotype: K000533733!; isolectotypes: BM000953406!, E00259257!, F [IRN:219876 photo!], GH00078579!, K000533734!, LD1216227!, P02976350!)

= Lamourouxia hyssopifolia Gray. Proc. Amer. Acad. Arts 21: 404. 1886. Lectotype designated here:— MEXICO. Chihuahua: at the Frailes in the mountains above Batopilas, E. Palmer 260 (Lectotype: GH00078576 !; isolectotypes: BM000953405!, K000533732!, MEXU00031627!, NY00090605!, PH00016831!, US 00125701!, US00125702!).

= Lamourouxia longiflora var. hyssopifolia (Gray) Reveal & Hess. Phytologia 25(3): 106. 1973. Basionym: L. hyssopifolia Gray.

Figure 8 D–F .

Herbs up to 150 cm tall, stems branched along the plant, erect or reclining, woody, glabrescent non-glandular. Leaves sessile, lanceolate to oblanceolate, 28–56 × 3–7 mm, margin entire or rarely 1–3 lobed, revolute, lobes 1–3 mm long; apex mucronulate, base attenuate; membranous, glabrous. Inflorescence a raceme, erect, pedicels thin, 2–5 mm long. Bracts equal along inflorescence, sessile, lanceolate to narrowly oblanceolate, 18–37 × 1.8–4 mm, margin entire, apex acute, base attenuate. Calyx campanulate without dots on the surface, 7–13 × 3–5 mm, lobes triangular to linear, 1.8–8 × 1–1.5 mm, margin entire, apex acute, glabrous. Corolla funnelform, 26–56 × 6–13 mm, upper lip 6–16 mm long, lower lip 15–20 × 1.2–2.7 mm, lobes 2–4.8 × 0.7–1.5 mm; red, pubescent, non-glandular. Stamens exserted 4, filaments 30.5–34.1 mm long, anthers 3.6–5.2 mm long. Style 25.4–43.4 mm long. Stigma bilobed, 0.7–0.8 mm long. Capsule ovoid, 7–1.3 × 5–7.5 mm, glabrous. Seeds not seen.

Etymology: —The name of the species refers to its elongated flowers.

Common name:— Huavuu pixa’ (Cora language).

Distribution and habitat: — Lamourouxia longiflora is an endemic species to Mexico. The species can be found in the states of Chihuahua, Durango, Jalisco, and Zacatecas in western and northern Mexico ( Fig. 8F ). This taxon is reported in pine ( Pinus lumholtzii Robinson & Fernald (1895: 122) and oak forests at 1920–2590 m.

Phenology: —The flowering and fruiting season of Lamourouxia longiflora is from July to January. Collections were made principally from September to November.

Nomenclatural notes and discussion: —The name Lamourouxia longiflora was published by Bentham (1839) with no reference to the type collection. Later, Bentham (1846: 540) reviewed the species of Lamourouxia and included the specimen Hartweg 188 without herbarium indication. The treatment of Ernst (1972) listed four type specimens distributed in BM, GH, K, and W. The revision of the type collection recovered six duplicates of the referred collection, of which, was selected as lectotype one specimen in K, with the best representation of the diagnostic characters defining the species. Also, a photograph of one specimen of W is stored in F ( Grant & Niezgoda 2020b).

Lamourouxia hyssopifolia was published by Gray (1886) based on the specimen Palmer 260 with no data of herbarium location. Later, Ernst (1972) cited five type specimens. For typification purposes, of the specimens available online, the specimen in GH possesses elongated and filiform calyx lobes and ventricose and short corollas as indicated in the protologue, was selected as a lectotype.

Lamourouxia hyssopifolia was established by Reveal & Hess (1973) as a variety of L. longiflora . It was established based on three revised collections; one of them (with 30 duplicates) was performed by the same authors.After reviewing specimens from several herbaria for this treatment, the pattern of characters and measures belonging to this variety was not consistent, and it is considered a synonym. Few specimens do not exhibit “common” features such narrowly linear leaves, or lobed leaves, but the reduced number of specimens does not allow establishing distinct varieties.

Examined specimens: — MEXICO. Chihuahua: Steep slope on edge of barranca 61 km S of Creel along road to Guachochic, 31 August 1984, Breedlove 61265 (MEXU!). Durango: Steep slopes at base of Espinosa del Diablo 4 km NW of Los Angeles along road between Mazatlan and Durango, 08 October 1983, Breedlove 35740 (ENCB!); Mezquital, 48 km west northwest of Huejuquilla El Alto , Jalisco on road to Canoas, Durango, 21 October 1983, Breedlove & Almeda 59029 (MEXU!); Santiago Papasquiaro, 20 air km WNW Santiago Papasquiaro, 3.3 mi by Topia rd. N of crest of Sierra from jct. with rd. to antenna, 25 August 1983, Corral & Worthington 11389 (COLO!); Mezquital, 19 km al SW de Charcos, camino a Santa María Ocotán , 2250 m, 05 October 1983, Fernández 1833 (ENCB!, MEXU!); Along the dirt road between Hidalgo del Parral and El Vergel, about 56 miles west of Parral and 20.6 miles west of Ojito , 14 September 1972, Reveal & Hess 3086 (ASU, COLO, MEXU!); along Mexico Highway 40, about 98.5 miles west of Durango and 103.5 miles east of Mazatlan, 0.9 mile west of La Ermita on el Espinazo del Diablo, 8.4 miles west of La Ciudad , 26 September 1973, Reveal & Atwood 3516 (MEXU!, US!); along Mexico Highway 40, about 98 miles east of Mazatlan and 104 miles west of Durango , 3.3 miles west of Los Bancos and 20.8 miles east of El Palmito , 27 September 1973, Reveal & Atwood 3560 (MEXU!, US!); El Salto , 3 km al E del poblado, La Ciudad, 2300 m, 09 July 1982, Tenorio & Romero 914 (MEXU!, MO); El Salto, Mesa de San Francisco a 24 km, al SE de El Salto, 2430 m, 10 September 1983, Tenorio et al. 4290 (ENCB!, MEXU!). Jalisco: Bolaños, Cerro del Gallo , predio “Las Berenjenas”, a 10 km al NO de Bolaños, 2000 m, 23 November 2002, Domínguez 7 (MEXU!), 29 November 2002, Roldán 37 (MEXU!); Bolaños, 5–8 km al SW del Crucero Tuxpan de Bolaños-Los Amoles , 2000 m, 28 September 1996, Flores-Franco & Soto 4757 (MEXU!); Bolaños, camino crucero de Banderitas-Tuxpan de Bolaños, Sierra de Bolaños , 31 October 2020, Ortiz-Brunel et al. 1021 (IBUG!). Zacatecas: Benito Juárez, Arroyo Las Ciruelillas , ca. 2.5 km en línea recta al SE de Los Campos, 2150 m, 16 January 2015, Carrillo-Reyes et al. 7635 (MEXU!).

Figures

FIGURE 8. Lamourouxia jaliscana (Holotype, McVaugh & Sooby Jr. 14250). A) Inflorescence. B) Leaves. C) Distribution map. Lamourouxia longiflora. D) Inflorescence in the field. E) Dry leaves. F) Distribution map. Credits in Appendix I.