Ophryosporus triangularis Meyen, Reise Erde 1: 402. 1834

Merklinger, Felix F. & Luebert, Federico, 2020, Notes on the genus Ophryosporus (Asteraceae, Eupatorieae) in Chile, PhytoKeys 161, pp. 61-77 : 61

Ophryosporus triangularis Meyen, Reise Erde 1: 402. 1834

Eupatorium decipiens Hook. & Arn. in Hook. Compan. Bot. Mag. 1: 240. 1835. Type: Chile. Region IV Coquimbo: H. Cuming 907 (lectotype, designated here, K [K000486661, photo!]; isolectotype: E [E00249908, photo!]); remaining syntypes: Chile. Region IV Coquimbo: Macrae s.n. E [E00249907, photo!, mounted together with lectotype].

Eupatorium foliolosum DC., Prodr. 5: 174. 1836.

Ophryosporus foliolosus (DC). Reiche, Anales Univ. Chile 109: 9. 1901. Type: Chile. Region IV Coquimbo: Macrae s.n. (lectotype, designated here: G-DC [G00130591, photo!]; remaining syntypes: Gaudichaud 100 (G-DC [G00130590, photo!]; P [P02673049 & P02673151, photo!]; K [K486660 & K486663, photo!]).

Kuhnia multiramea Turcz. Bull. Soc. Imp. Naturalistes Moscou 24: 168. 1851. Type: Chile. Region IV Coquimbo: T.C. Bridges 1412 (holotype: KW [144506, photo!]; isotypes: KW [144505, photo!]; E [E00249909, photo!]; P [P02673149, photo!]).

Eupatorium volckmannii Phil. Anales Univ. Chile 18: 51. 1861. Type: Chile. Region III Atacama, Vallenar: Volckmann s.n. 1860 (holotype: SGO [SGO065417!]; isotype: GH [GH00014290, photo!]).

Type.

Chile. Region III Atacama: Copiapó, F.J.F. Meyen s.n. (holotype: B [probably destroyed]; F neg. 14718!).

Notes.

This species is widespread and more or less continuously distributed along the coast of northern Chile. The southernmost localities where it was observed during our study were at the southern edge of the Río Limarí, where its range overlaps with that of Ophryosporus paradoxus . The northern end of its distribution appears to be the Río Loa. North of Paposo, at Aguada del Panul, it grows sympatrically with O. johnstonii , to which it bears close morphological resemblance. However, O. triangularis is identified by its slightly larger leaves, which are grouped in alternating fascicles, are shortly petiolate, triangular with a cuneate base and an acute apex, and reaching about 3-5 × 5-15 mm as opposed to much smaller leaves in O. johnstonii , which reach only c. 1-3 × 3-5 mm. Leaf-size is, however, extremely variable, and plants that grow in more humid conditions often possess larger leaves. The leaf margins of O. triangularis are regularly lobed to dentate and revolute. The inflorescences are spike-like, and the capitula are pedunculated. The spike-like inflorescences appear somewhat denser than in O. johnstonii , and, in this latter species, the capitula are sessile. Its florets have a white corolla, sometimes with a violet taint. The pappus is formed by whitish-brown setae, c. 2.5-3.5 mm long. In the area around Cobija, both, O. triangularis and O. anomalus have been collected in the past.

Specimens examined.

Chile. Region II Antofagasta: Prov. Tocopilla, quebrada 2-3 km N of Tocopilla above old Caleta Duendes, 150-200 m, 18 Oct 1988, M.O. Dillon & D. Dillon 5718 (BONN); Tercera quebrada Tocopilla, 22.0558S, 70.17662W, 300 m, 18 Oct 2016, F. Luebert, A. Stoll & T. Böhnert 3413 (BONN, ULS); Quebrada La Higuera, S Tocopilla, 22°18'7"S, 70°12'58"W, 30 Sep 2005, F. Luebert, N. Garcia & N. Schulz 2569/963 (EIF); Quebrada above Caleta Buena, S Mantos de la Luna, 22.43075S, 70.22186W, 640 m, 10 Oct 2017, F. Luebert, T. Böhnert & F.F. Merklinger 3989 (BONN, ULS). Prov. Antofagasta, near Cobija, 19 Dec 1971, O. Zöllner 4593 (L153863); Juan López, 23.51205S, 70.53365W, 150 m, 19 Jul 2003, M. Antonissen 7 (EIF); Quebrada La Chimba, 17 Dec 1987, M.O. Dillon & J.T.S. Teillier 5321 (BONN); Quebrada La Chimba, 23°33'S, 70°22'W, 380-480 m, 11 Nov 1988, M.O. Dillon & D. Dillon 5881 (BONN); Quebrada La Chimba, 23.53567S, 70.35887W, 460 m, 17 Oct 2016, F. Luebert, A. Stoll & T. Böhnert 3408 (BONN, ULS); Quebrada Cardón, 24.741717S, 70.542687W, 210 m, 5 Oct 2017, F. Luebert, T. Böhnert & F.F. Merklinger 3949 (BONN, ULS); Aguada Cardón, 24.74173S, 70.54385W, 210 m, 15 Oct 2016, F. Luebert, A. Stoll & T. Böhnert 3389 (BONN, ULS); Quebrada Panul, 24.773468S, 70.533915W, 180 m, 4 Oct 2017, F. Luebert, T. Böhnert & F.F. Merklinger 3939 (BONN, ULS); Quebrada Panul, 24.777263S, 70.531618W, 190 m, 5 Oct 2017, F. Luebert, T. Böhnert & F.F. Merklinger 3944 (BONN, ULS); Quebrada Panul, 24.777263S, 70.531618W, 190 m, 5 Oct 2017, F. Luebert, T. Böhnert & F.F. Merklinger 3944A (BONN, ULS); c. 7 km N of Paposo, 24°57'S, 70°29'W, 40 m, 14 Dec 1987, M.O. Dillon & J.T.S. Teillier 5262 (BONN); El Rincón, al N de Paposo, 17 Sep 1941, C. Muñoz P. & G.T. Johnson 2902 (SGO118350); Paposo, base Cerro Carneros, 24°56'24"S, 70°28'44.6"W, 160 m, 23 Oct 2009, A. Moreira & F. Luebert 1200 (SGO158780); Quebrada Portezuelo, 25.0124S, 70.446467W, 550 m, 13 Oct 2016, F. Luebert, A. Stoll & T. Böhnert 3357 (BONN, ULS); Quebrada Matancilla, c. 5 km S of Punta Grande, 25°07'S, 70°27'W, 170-350 m, 27 Oct 1988, M.O. Dillon, D. Dillon, V. Asencio & M. Villarroel O. 5750 (BONN); Cachinalcito, 25°10', 28 Nov 1925, I.M. Johnston 5173 (S); c. 20 km N of Taltal, quebrada Anchuña, 25.23543S, 70.42594W, 183 m, 31 Aug 2018, F.F. Merklinger, A. Kozok & D. Quandt 2018-63 (BONN, ULS); c. 20 km N of Taltal, quebrada Anchuña, 25.23543S, 70.42594W, 183 m, 31 Aug 2018, F.F. Merklinger, A. Kozok & D. Quandt 2018-64 (BONN, ULS); c. 20 km N of Taltal, quebrada Anchuña, 25.23543S, 70.42594W, 183 m, 31 Aug 2018, F.F. Merklinger, A. Kozok & D. Quandt 2018-65 (BONN, ULS); c. 20 km N of Taltal, quebrada Anchuña, 25.23543S, 70.42594W, 183 m, 31 Aug 2018, F.F. Merklinger, A. Kozok & D. Quandt 2018-66 (BONN, ULS); Quebrada El Médano, 300 m, 8 Oct 1941, E. Pisano V. & R. Bravo F. 398 (SGO); Quebrada San Ramón, 25.38578S, 70.43658W, 120 m, 11 Oct 2016, F. Luebert, A. Stoll & T. Böhnert 3346 (BONN, ULS); Quebrada San Ramón, 17 Sep 1968, O. Zöllner 2851 (U [U3661650]); Cerro Perales, c. 5 km E of Taltal, 25°25'S, 70°25'W, 550 m, 21 Nov 1988, M.O. Dillon & D. Dillon 6002 (BONN); Hills SE of Taltal, 25°29'S, 25 Nov 1925, I.M. Johnston 5080 (S); Posado Hidalgo, 25°45'S, 70°35'W, 13 Dec 1925, I.M. Johnston 5661 (S); along road Panamericana toward Caleta Esmeralda, 25.895921S, 70.581052W, 500 m, 9 Oct 2016, F. Luebert, A. Stoll & T. Böhnert 3308 (BONN, ULS). Region III Atacama: Prov. Chañaral, 21 km W of Panamericana on northern route to Pan de Azucar NP, 26°08'S, 70°37'W, 85 m, 30 Sep 1988, M.O. Dillon, D. Dillon & V. Pobleto 5609 (BONN); Falda Verde, hills N of Chañaral, 26.296721S, 70.631252W, 75-600 m, 1 Oct 2017, F. Luebert, T. Böhnert & F.F. Merklinger 3905 (BONN); Hills back of El Barquito, 26°23'S, 28-29 Oct 1925, I.M. Johnston 4809 (S). Prov. Copiapó, Sector quebrada El León, 26.976625S, 70.773903W, 70 m, 8 Oct 2016, F. Luebert, A. Stoll & T. Böhnert 3290 (BONN, ULS); Caldera on small point just north of town, 27°3'S, 22 Nov 1925, I.M. Johnston 5067 (S); Copiapó, 400 m, 13 Jul 1938, Ch.H. Andreas 885 (U [U1145297]); Tierra Amarilla, 700 m, Oct 1924, E. Werdermann 456 (U [U1145305]); Estancia Castilla, road from Totoral to Panamericana, 27.919994S, 70.84531W, 240 m, 28 Sep 2017, F. Luebert, T. Böhnert & F.F. Merklinger 3869 (BONN, ULS). Prov. Huasco, Road Carrizal Bajo to Canto de Agua, c. 2 km from Carrizal Bajo, 28.112004S, 71.116139W, 45 m, 7 Oct 2016, F. Luebert, A. Stoll & T. Böhnert 3279 (BONN, ULS); Quebrada Baratillo, 28°21'57"S, 71°7'21"W, 150 m, 14 Sep 2003, F. Luebert & L. Kritzner 1805 (EIF); Quebrada Baratillo, 28.363325S, 71.096321W, 110 m, 7 Oct 2016, F. Luebert, A. Stoll & T. Böhnert 3269 (BONN, ULS); Hills E of Tres Playitas, 28.400532S, 71.16755W, 160 m, 27 Sep 2017, F. Luebert, T. Böhnert & F.F. Merklinger 3854 (BONN, ULS). Region IV Coquimbo: Prov. Elqui, Guayacán, s.a., unknown s.n. (S); Puente Juan Soldado, 29.656542S, 71.301174W, 200 m, 27 Sep 2017, F. Luebert, T. Böhnert & F.F. Merklinger 3831 (BONN, ULS); La Serena, 16 Sep 1947, B. Sparre 2595 (S); Coquimbo, Jul-Aug 1958, W.H. Harvey s.n. (S); Coquimbo, 100 m, Nov 1923, E. Werdermann 124 (U [U1145298]); Coquimbo, rocks behind the Fort, 29.93372S, 71.33691W, 25 m, 24 Sep 2017, F. Luebert, T. Böhnert & F.F. Merklinger 3809 (BONN, ULS); Coquimbo, rocks behind the Fort, 29.93372S, 71.33691W, 25 m, 24 Sep 2017, F. Luebert, T. Böhnert & F.F. Merklinger 3809A (BONN, ULS); Herradura, 9 Aug 1917, C. & I. Skottsberg 704 (S). Prov. Limarí, Ovalle, Río Límari, 11 Oct 1947, B. Sparre 2994 (S); N of Caleta El Toro, 30.737239S, 71.699907W, 25 m, 23 Sep 2017, F. Luebert, T. Böhnert & F.F. Merklinger 3794 (BONN, ULS); along road from Los Loros to Caleta El Toro, 30.741021S, 71.65348W, 50 m, 23 Sep 2017, F. Luebert, T. Böhnert & F.F. Merklinger 3786 (BONN, ULS).