Oxalis morronei Alicia Lopez & Mulgura 2011, sp. nov.

• Main Authors: López, Alicia, Múlgura, María Ema
• Format: Other/Unknown Material
• Language: unknown
• Published: 2011
• Subjects: Biodiversity; Taxonomy; Plantae; Tracheophyta; Magnoliopsida; Oxalidales; Oxalidaceae; Oxalis; Oxalis morronei; Argentina; Lopez; Hooker; Ruta; Alicia; antartic*
• Online Access: https://zenodo.org/record/4926225; https://doi.org/10.5281/zenodo.4926225

Oxalis morronei Alicia López & Múlgura, sp. nov., Fig. 1 A–K Ad Oxalidem squamoso-radicosam affinis, sed foliolis quadratis apice emarginato et margine pilosulo et undulato differt. Type:— ARGENTINA. Santa Cruz: Dpto. Lago Buenos Aires. Ruta Provincial 41, camino de Los Antiguos a Paso Río Roballos, 47º57´49´´S, 71º50´10´´W, 1,247 m, 9 January 2011. L . Zavala, D. Degenaro, C. Guerreiro, A. López & H. Illarraga 204 (holotype SI!). Herb 4–5 cm. Rhizomes 4–5 mm diam. with sparse ramifications, covered with thick scales; scales spirally imbricate, whitish, conical, with dark spot at apices; roots fibrous, adventitious, profusely branched. Leaves usually between 2 and 6 per plant. Stipules 2.0– 2.5 mm long, hyaline, fully adnate to the petiole, narrowed toward the apex. Petioles 4–5 cm. Blades with 10–12 leaflets: leaflets 3.5–4.0 × 4.5–5.0 mm, sessile, square, folded, bases slightly cordate, margin wavy, ciliate, apices deeply emarginate, venation pinnate, glabrous on both surfaces. Flowers solitary, peduncle 4–5 cm, glabrous, bibracteolate; bracteoles up to 2 mm, hyaline, ovate, acute, sheathing, adnate at the base, glabrous, pedicel 3 mm, pubescent. Sepals 5.0–5.5 × 2.0– 2.5 mm, pubescent externally, glabrous inside. Petals 1.5–2.0 × 0.5–1.0cm, pink to violet with purple streakes. Long stamens with dorsal teeth and multiseriate hairs with warted wall on the abaxial edge. Short stamens glabrous. Fruits not seen. Distribution and habitat:— Only known from “camino de Los Antiguos a Paso Río Roballos” (Fig. 2 A– B). The species grows in the shelter of rocks, in rocky and sandy soils, on slopes with western exposure, near a stream. The location corresponds to the confluence of two phytogeographical provinces: the Alto-Andina and the Sub-Antartic (Cabrera & Willink 1980). Oxalis morronei is associated with Festuca L., Nassauvia darwinii (Hook. & Arn.) O.Hoffm. & Dusen, Lathyrus magellanicus Lam., Calceolaria uniflora Lam., and Oxalis adenophylla Gillies ex Hooker & Arnott (1832: 165). ...