Lobelia macrocentron, (Bentham) Ayers (1990: 312)

Gutiérrez-Sánchez, Rosa Ivonne, Castro-Castro, Arturo, Gallegos, Jesús Guadalupe González-, López-Enríquez, Irma Lorena & Frías-Castro, Alfredo, 2018, Synopsis of the spurred species of Lobelia section Stenotium (Campanulaceae) in Sierra Madre Occidental, Mexico, and the description of two new species, Phytotaxa 338 (1), pp. 33-48 : 38-39

7. L. macrocentron (Bentham) Ayers (1990: 312) .

Heterotoma macrocentron Bentham in Hooker (1876: 68). Type:— MEXICO, Durango or Nayarit (?): Sierra Madre, NW of Mexico, November– February 1849 -50, B.C. Seemann 2049 (holotype K!, isotype BM!).

Distribution: — MEXICO: The exact locality for type collection is unknown, but it was possibly collected between Durango and Tepic, Nayarit. For a more thorough discussion about the type locality see Ayers (1987). It is an endemic species to Mexico known from the Madrean Central.

Representative specimens examined: — MEXICO. Only known from type collection.

8. L. mcvaughii Ayers (1987: 21) Type:— MEXICO, Durango: 34 road-miles W of El Salto, along highway from Durango to Mazatlán, 24 March 1951, R. McVaugh 11528 (holotype MICH!, isotypes MICH!, NY!, TEX!). ( Figure 2 )

Distribution: — Lobelia mcvaughii is endemic to Mexico. Lobelia mcvaughii is known only from the type locality along western slopes of Sierra Madre Occidental in Durango, in the Tropical region. The species grows at an elevation range of 2570 to 2725 m ( Figure 1 ).

Representative specimens examined: — MEXICO. Durango: Puerto Buenos Aires , 23°41’39.1”N, 105°43’47.7”W, 2694 m, 28 March 1979, Walker 79H61 (NY) ; Pueblo Nuevo, 34.2 mi W of El Salto, 2 mi W of Buenos Aires at bridge called Puerto Buenos Aires , 25°44’54.27”N, 105°4’36.32”W, 1573 m, 14 March 1984, T.J. Ayers 336 (MEXU!, NY, TEX) ; La Ciudad, km 155 de la carretera libre Durango-Mazatlán, alrededores del Puerto de Buenos Aires , 23.69388°N, 105.73315°W, 2655 m, 8 June 2017, A. Castro-Castro et al. 4249 (CIIDIR!, IBUG!, IEB!, MEXU!, XAL!) .

Figures

FIGURE 1. Distribution map of spurred species of Lobelia along the Sierra Madre Occidental, Mexico. A. L. ayersiae (■), L. flexuosa (○), L. goldmanii (□), L. knoblochii (∆) and L. mcvaughii (♦). B. L. cordifolia (▲), L. endlichii (●), L. macrocentron (*), L. rzedowskii () and L. saturnini (▼).

FIGURE 2. Lobelia mcvaughii. A. Habit. B. Flower in frontal view. C. Flower in lateral view. D. Fruit with persistent hypanthium.