Festuca dissitiflora Steudel ex Grisebach (1879: 287)

Ospina, Juan C., 2016, New lectotypifications and new synonyms in Festuca (Poaceae, Pooideae, Loliinae) from the Central Andes, Phytotaxa 247 (4), pp. 247-258 : 253-254

Festuca dissitiflora Steudel ex Grisebach (1879: 287)

Lectotype:— ARGENTINA. Salta: General Güemes. ‘ Nevado del Castillo , alt. 10-15000’, 19–23 March 1873, P. G. Lorentz & G. H. E. W. Hieronymus 71 (lectotype B 10 0002575! designated here; isolectotypes BAA 0000377 !, CORD 00004667 !, CORD 00004668 !, LIL 519023 !, S S-R-2260!).

Festuca castilloniana Türpe (1973: 285) . Type:— ARGENTINA. Tucumán: Tafí del Valle,‘Dpto. Tafí: Cumbres Calchaquíes , Portezuelo’ , 3600 m, March 1913, L. Castillón 2884 (holotype LIL 44250 !; isotype BAA 00002021 !). Syn. nov.

Festuca potosiana Renvoize (1998: 122) . Type:— BOLIVIA. Potosi: ‘ Sud Lipez, 37 km from San Pablo towards Tupiza , steep stony slopes’, 8 April 1992, S. A. Renvoize, G. Flores & C. Peca 5294 (holotype LPB!; isotypes K 000433644!, MO 5151203!, G, NY 00074024!, US 3323521!). Syn. nov.

Taxonomic notes:— Grisebach (1879: 278) in the protologue of Festuca dissitiflora cited ‘S. [Salta]: Nevado del Castillo, alt. 10–15000. ( Peru)’. Two syntypes were cited by Darbyshire et al. (2003) and Catalán and Müller (2012) for this taxon: ‘S. [Salta]: Nevado del Castillo, alt. 10–15000, P. G. Lorentz & G. H. E. W. Hieronymus 71 (GOET!; isosintipo, CORD)’, and ‘ Peru. Lechl. pl. peruv. 1829’ (without herbarium). The type collection deposited in GOET was not found (M. Appelhans pers. comm. 2015). Duplicates were found in B, BAA, LIL, and S. The specimen deposited in B was determined as F. dissitiflora by Grisebach (it bears his handwriting), and it was studied by St.- Yves, who reaffirmed Grisebach´s determination. Therefore, the specimen B 10 0002575 is chosen as lectotype of F. dissitiflora . The second specimen cited by Darbyshire et al. (2003) and Catalán and Müller (2012) corresponds to the type specimen of F. dissitiflora Steud. ex Lechler (1857: 56) nom. nud.

Festuca castilloniana was described by Türpe (1973: 285). She found only the type specimen and therefore the validity of this taxon is not well supported, and she added that F. castilloniana is related to F. dissitiflora by their morphological similarity. All morphological, epidermal ( Figs. 1c–d ), and anatomical ( Fig. 2b ) characteristics overlap, indicating that F. castilloniana has been wrongfully recognized as a species different from F. dissitiflora ( Figs. 1a–b , and 2a ). Therefore, F. castilloniana is proposed as a new synonym under F. dissitiflora .

Festuca potosiana described by Renvoize (1998) from Potosi ( Bolivia), forms part of the morphological variation pattern of vegetative and reproductive morphological characters found in F. dissitiflora and F. castilloniana . All anatomical ( Fig. 1c ) and epidermal ( Figs. 2e–f )characters observed in specimens of F. potosiana ( Figs. 1e–f ) from general collections and type material form a continuum with the characters of specimens of F. castilloniana and F. dissitiflora . Therefore, F. potosiana is proposed here as a new synonymy under F. dissitiflora .

Festuca loricata , F. villipalea , and F. erecta var. aristulata were considered as synonyms of F. dissitiflora by Catalán and Müller (2012). In this study, morphological, epidermal and anatomical characteristics, including type material, provide several differences ( Figs. 1g –h , 2e ) supporting their separation from F. dissitiflora , because these characters are part of the morphological variability pattern of F. fiebrigii . Taxonomic statuses of F. loricata , F. villipalea , and F. erecta var. aristulata regarding F. fiebrigii were clarified by Ospina et al. (in press).

Many of the specimens mentioned here were found to be determined in herbaria as F. castilloniana , F. erect, F. loricata , but actually belong to F. fiebrigii . Below are cited specimens determined as F. dissitiflora or its synonyms according to criteria established herein.

Specimens examined:— ARGENTINA. Jujuy: Department of Tilcara, camino de Campo de Laguna hacia Alfarcito , 4055 m, 23º35´8”S, 65º18´30”W, 13 February 2010, Zuloaga F. O. et al. 11763 ( SI) ; camino de Yuto Pampa a Coral de Ventura , 3520 m, 23º34´19”S, 65º14´44”W, 12 February 2010, Zuloaga F. O. et al. 19629 ( SI) ; between Hwy 9 and Río Grande at iturbe on Hwy 13 to Iruya , ca 0, 5 km w of Iturbe , 3417 m, 22 º58´53 “S, 65º21´21”W, 30 March 2006, Peterson P. M. et al. 11731 ( SI) ; de Yavi, Ruta Nacional 40, de La Quiaca a Santa Catalina , 3640 m, 28º8´11”S, 65º44´19”W, 19 February 2011, Zuloaga F. O. et al. 13081 ( SI) . Mendoza: Department of Las Heras, Parque Provincial Aconcagua , 3786 m, 69º89´S, 86º90´W, 26 January 2011, Barros A. 38, 39, 40 ( SI) . Salta: Department of Santa Victoria , ruta 7, km 30, cerca de Pueblo Viejo, 6 February 2003, Sanso M. & Xifreda C. 211 ( SI) ; camino de Abra Fundición a Nazareno , 4010 m, 22º29´1”S, 65º6´30”W, 21 February 2011, Zuloaga F. O. et al. 13182 ( SI) . BOLIVIA. La Paz: Province of Aroma, Cañawiri , 17º20´S, 68º20´W, 19 February, Yanapa R. 345 ( LPB) . Oruro: Province of Sebastián Pagador , 2 min E of Urmiri, 3650–3850 m, 8 March 1993, Peterson P. M. et al. 12769 ( LPB) . Potosi: Province of Sud Chicas, 26 mi N of San Vicente and 9 mi S of Atocha , 3980 m, 14 March 1993, Peterson P. M. et al. 12915 ( LPB) ; 15–16 mi E of Atocha on road towards Santa Barbara , 4300–4600m, 15 March 1993, Peterson P. M. et al. 12933 ( LPB) ; Province of Sud Lípez , 37 km E de San Pablo, March 1998, Renvoize S. A. et al. 5294 ( LPB) ; 15–16 mi E of Atocha on road towards Santa Barbara , 4300–4600m, 15 March 1993, Peterson P. M. et al. 12933 ( LPB) .

Figures

FIGURE 1. Leaf-blade cross section. a. Festuca dissitiflora (Barros A. 39, BAA). b. Festuca castilloniana (Castillón L. 2884, LIL). c. Festuca potosiana (Renvoize S. A. et al. 5294, LPB). d. Festuca circinata (Hieronymus G. H. E. W. 535, CORD). e. Festuca fiebrigii (Fiebrig K. A. G. 3118, BAA). Scale bars a, c = 100μm, b, d, e = 200 μm.

FIGURE 2. Micromorphology of abaxial and adaxial leaf blade epidermis. a–b. Festuca dissitiflora (Barros A. 39, BAA). c–d. Festuca castilloniana (Castillón L. 2884, LIL). e–f. Festuca potosiana (Renvoize S. A. et al. 5294, LPB). g–h. Festuca fiebrigii (Fiebrig K. A. G. 3118, BAA). i–j Festuca circinata (Hunziker A.T. 9042, BAA). Scale bars a = 100 μm, b = 50 μm, c = 200 μm, d = 100 μm, e = 200 μm, f = 200 μm, g = 50 μm, h = 50 μm, i = 200 μm, j = 100 μm.