Adesmia securigerifolia Herter, Candollea
Creators: name: Monteiro, Thiago Cobra E
name: Iganci, João Ricardo Vieira
name: Miotto, Silvia Teresinha Sfoggia
name: Simpson, Beryl B.
name: Vatanparast, Mohammad
name: Lewis, Gwilym P.
name: Klitgård, Bente B.
name: Pezzini, Flávia Fonseca
name: Vargas, Oscar M.
name: Fortuna-Perez, Ana Paula
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Fabales
Fabaceae
Adesmia
Adesmia securigerifolia

description: 17. Adesmia securigerifolia Herter, Candollea 10: 87 (1946).   
 Type:— URUGUAY. Durazno: Villasboas, in Campis, 07 November 1899, {fl./fr.}, Osten, C. 3892 (holotype: G barcode G00364553 [photo!]; isotype SI barcode 004026 [photo!]).   
 Prostrate to ascendant subshrubs, adventitious roots from stem branch nodes absent. Stem pilose, long ochraceous glandular setules on all plant parts. Stipules 3.4–5.5× 1.8–3.3 mm, deltate to lanceolate, pilose to glabrous. Leaves with 3–5 pairs of leaflets; petiole 0.3–1.5 cm long, rachis 0.4–2 cm long, pilose; leaflets 2.5–13× 1–6 mm, elliptic to obovate, apex retuse, base acute, margin entire, pilose. Solitary axillary flowers from the base of the stem to the apex; bracts absent; pedicel 3.5–24 mm long, pilose. Flowers 5.7–6.9 mm long; calyx 3–4 mm long, externally pilose, internally hirsute on the lobes with white tector hairs; lobes 1.1–1.8 mm long, narrowly triangular to linear; standard petal slightlY curVed to reflexed, 6–7× 4–5.5 mm, orbicular to wide-oboVate, apex obtuse to emarginate, externallY glabrous, claw 2.2–3.1× 0.7–1.2 mm, internallY pubescent; wing petals 5.1–7.4× 1.3–2 mm, oboVate, claw 2.2–2.7 mm long; keel petals 4.6–5.7× 1.9–2.6 mm, falcate, claw 1.5–3 mm long; stamens 4.6–7.1 mm long, anthers orbicular; gynoecium 5.5–7 mm long, ovary 2.5–4 mm long, hirsute, 3–5-ovulate. Lomentum 5.6–19.3 mm long, recurved, light brownish to black, pilose, stiff ochraceous setules at the centre of each article, fruit with 3–5 articles, these 3.4– 4.4× 3.2–4.7 mm, triangular. Seeds speckled, blackish, 2.1–2.7× 2.1–2.6 mm, reniform to slightlY triangular, without an aril. (Figures 20 J–M, 29 A and 30).   
  Distribution and Habitat— Adesmia securigerifolia  occurs mainly in Uruguay, in eastern Entre Ríos in Argentina, and near the border in the south of Rio Grande do Sul, Brazil (Fig. 31). It occurs in open grasslands.   
 Phenology— Flowering from September to October, and fruiting from October to November.   
 Conservation status— Least Concern (LC). Adesmia securigerifolia has an EOO of 132.450, 467 km ², and an AOO of 80 km ². The species occurs in many locations in Uruguay, as well as occurring sporadically in Rio Grande do Sul state in Brazil and in the Entre Ríos province of Argentina.   
 Etymology— The epithet securigerifolia comes from the resemblance of the leaves with species of Securigera de Candolle (1815: 609), another genus of Leguminosae – Papilionoideae from the Old World, related to Coronilla Linnaeus (1753: 742).   
  Notes— Adesmia securigerifolia  morphologically resembles A. bonariensis Burkart and A. smithiae DC. due to the presence of solitary axillary flowers, a prostrate habit, and remarkably retuse leaflets (Fig. 29–30). The species is diagnosed by its lomentum with triangular articles (vs. a hemicraspedium with orbicular articles in A. bonariensis, and discoid articles in A. smithiae), as well as a difference in distribution range, being restricted to Uruguay and nearby regions (Entre Ríos in Argentina and Rio Grande do Sul in Brazil).   
 Additional Specimens Examined — BRAZIL. RIO GRANDE DO SUL: Bagé, 3 km Oeste do Rio Santa Maria, ao longo da rodovia de Bagé para Dom Pedrito, 06 September 1986, Valls, J. F. M . et al. 10283 (UEC 55204); 01 December 1992, Bastos, N. R . s/n (PACA 109625); 13 km de Bagé para Serrilhada, 10 December 1982, Valls, J. F. M . 6972 (HAS 27111); 24 km de Bagé para Serrilhada, 08 December 1990 Machado, L. A. Z . 713 (SMDB 3744); 10 km de Bagé para Serrilhada, 08 December 1990, Machado, L. A. Z . 697 (HAS 3743). Dom Pedrito, 01 November 1981, Bueno, O . 3296 (HAS 13888). Santana do Livramento, 5 km de Santana do Livramento, 16 October 1979, Mattos, J . 19452 (HAS 84510). URUGUAY. Durazno: ruta 6 a 26 km de Sarandi del Yi hacia Rincón de Ramirez, 16 December 1993, Brescia, R . & Bayce, D. s/n (MVFA 24012). Lavalleja: ruta 8, km 166, 14 November 1996, Izaguirre, P . et al. s/n (MVFA 32966). Río Negro, en base de barranca Greco, Ruta 20, km 106.5, Estancia San José, 24 October 1997, Marchesi, E . & Vignale, M. s/n (MVFA 27050). Rivera: Estancia Los Ombúes, Minas de Corrales, 12 October 1996, Bayce, D & Davies, P . s/n (MVFA 25933).
description: Published as part of Monteiro, Thiago Cobra E, Iganci, João Ricardo Vieira, Miotto, Silvia Teresinha Sfoggia, Simpson, Beryl B., Vatanparast, Mohammad, Lewis, Gwilym P., Klitgård, Bente B., Pezzini, Flávia Fonseca, Vargas, Oscar M. & Fortuna-Perez, Ana Paula, 2024, Towards a Monophyletic Infrageneric Circumscription of Adesmia DC. (Dalbergieae, Leguminosae): a Taxonomic Revision in Adesmia series Adesmia, pp. 1-69 in Phytotaxa 639 (1) on page 54, DOI: 10.11646/phytotaxa.639.1.1, http://zenodo.org/record/13213359