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Adesmia sessilifolia Iganci & Miotto, sp. nov. (Figure 1) Ad Adesmia ser. Psoraleoides pertinens, A. paranensis Burkart similis, sed foliis sessili (non longi petiolata), foliola ovate-lanceolate (non oblongis), visibilibus venis ramosis (vs. mediana visibilibus sola) et 35 cm alta (vs. 70–90 cm alta) differt. Type:— BRAZIL. Rio Grande do Sul: São Francisco de Assis, em campo, 16 January 1991, fl. and fr., Z . Machado 1236 (holotype ICN, isotype K). Small and ramose shrublets, up to 35 cm, perennial, with xylopodium, stems slightly lignified and branches glabrous except for brownish trichomes covering the inflorescences. Leaves paripinnate, sessile, 6–8 pairs of leaflets; leaflets ovate-lanceolate, 10–13 × 5–8 mm, apices obtuse and mucronate, both surfaces completely glabrous, chartaceous, glands absent, primary and secondary veines pronounced. Stipules lanceolate, 4 mm long. Racemes short, few-flowered, 4–9 cm long; bracts 5–6 mm long, triangular to lanceolate; pedicels 2–5 mm long, initially erect, curved after anthesis. Flowers yellow, 10–14 mm long; calyx 8–9 mm long, pubescent, campanulate, teeth 5, these 6–7 mm long; banner 9–11 × 10–14 mm, ovate to suborbicular, glabrous; wings 10–12 mm long, glabrous; keel 10–12 mm length, glabrous; stamens 10, filaments free; ovary 6–7 mm long, sessile, sericeous, style 8 mm, stigma punctiform. Fruit a hemicraspedia, dark brown, with 4–6 articles, subquadrangular, 4 × 4 mm. Seeds subdeltoid, 2 mm in diameter, with a developed dark brown aril. Distribution: — Adesmia sessilifolia is only known from the central-western part of Rio Grande do Sul state, Brazil, in grasslands above outcrops of basalt close to sandy soils. Etymology: —The epithet refers to the sessile leaves. Additional specimens examined: — BRAZIL. Rio Grande do Sul: Santiago, litossolo sobre basalto, 23 March 1991, fr., J . F.M. Valls, Gomes, Moraes & Oliveira 12864 (ICN, CEN); Quevedos, estrada Jarí- Quevedos, 9 December 2004, fl. and fr., S . Bordignon, R, Cancelli & R. Backes s.n. (ICN). Discussion: — Adesmia sessilifolia is similar to A. paranensis Burkart (1954: 521) by having glabrous branches and leaves, pilose inflorescences and seeds with well-developed dark brown arils. It differs from that species in the size of the leaflets, by having sessile leaves with rounded leaflets with pronounced veines on both surfaces. Flowers and fruits appear later in the summer (December to March), compared with A. paranensis (October to December, rarely in February). In addition, A. sessilifolia differs in its geographic distribution, occurring in grassland on basaltic relicts in central-western Rio Grande do Sul, while A. paranensis is restricted to the core area of the fields on basalt, at higher elevations, between 840 and 1300 m, in the states of Santa Catarina and Paraná., Published as part of Iganci, João R. V. & Miotto, Silvia T. S., 2011, Adesmia sessilifolia (Fabaceae), a new species from a relictual landscape in southern Brazil, pp. 21-24 in Phytotaxa 26 on pages 22-23, DOI: 10.11646/phytotaxa.26.1.4, http://zenodo.org/record/4894118, {"references":["Burkart, A. (1954) Contribucion al estudio del genero Adesmia (Leguminosae), II. Darwiniana 10: 465 - 544."]}

Key to species of Adesmia ser. Psoraleoides 1. Slightly lignified plants, subshrubs and shrubs............................................................................................................ 2 - Herbaceous plants......................................................................................................................................................... 7 2. Pedicels erect, even in fruit. Leaflets 1.6–5.0 × 0.6–2.2 mm, generally conduplicate.................................... A. tristis - Pedicels reflexed after anthesis. Leaflets 6.0–20.0 × 2.1–10.0 mm, generally flat...................................................... 3 3. Branches and leaves glabrous, only the inflorescences pubescent............................................................................... 4 - Branches, leaves and inflorescences pubescent........................................................................................................... 5 4. Plants up to 35 cm tall; leaflets 10–13 × 5–8 mm, pinnately veined....................................................... A. sessilifolia - Plants 70–90 cm tall; leaflets 5.5–15.0 × 2.0– 4.8 mm, single-veined..................................................... A. paranensis 5. Inflorescences lax; flowers 7–9(–10) mm in length............................................................................... A. rocinhensis - Inflorescences dense; flowers 14.0– 19.5 mm in length................................................................................................ 6 6. Plants with prominent leaf scars and persistent stipules; racemes short, corymbose, aril absent............... A. reitziana - Plants without leaf scars; racemes long, seeds arillate......................................................................... A. psoraleoides 7. Racemes with axillary flowers at the base..................................................................................................... A. araujoi - Racemes or panicles without axillary flowers.............................................................................................................. 8 8. Leaflets broadly elliptic, suborbicular or obovate, 3.0–7.0 mm wide.......................................................................... 9 - Leaflets elliptic, oblong, obovate or rarely ovate, 0.7–2.8(–4.0) mm wide................................................................ 10 9. Leaves with 2–4(–5) pairs of leaflets. Pedicels 6.5–7.5 mm long. Hemicraspedium with 2–4(–5) orbicular articles............................................................................................................................................................................. A. valsii - Leaves with (3–)5–8(–9) pairs of leaflets. Pedicels 1.5–5.0 mm long. Hemicraspedium with (2–)4–7 subquadrangular articles......................................................................................................................................................... A. sulina 10. Hemicraspedium articles 2.5–3.5 × 1.6–3.3 mm. Seeds with very short aril................................................. A. ciliata - Hemicraspedium articles 3.5–4.8 × 2.7–3.5 mm. Seeds with well-developed aril........................................ A. arillata, Published as part of Iganci, João R. V. & Miotto, Silvia T. S., 2011, Adesmia sessilifolia (Fabaceae), a new species from a relictual landscape in southern Brazil, pp. 21-24 in Phytotaxa 26 on page 23, DOI: 10.11646/phytotaxa.26.1.4, http://zenodo.org/record/4894118

Estudou-se a variação da composição florística da vegetação campestre e suas relações com altitude e exposição no Morro da Polícia, de origem granítica, em Porto Alegre, Rio Grande do Sul, a 30ºS e 51 ºW. O levantamento foi realizado de novembro de 1992 a novembro de 1994. A presença e freqüência de espécies foi avaliada usando o método de pontos sobre transecções em 19 unidades de vegetação, as quais foram delimitadas com base na exposição da encosta (N, S, L, O) e altitude (160 a 280m). Os dados foram submetidos a análise multivariada de agrupamentos e ordenação. Nas transecções foram observadas 189 espécies, sendo Poaceae, Asteraceae e Apiaceae as famílias mais freqüentes e Trachypogon montufari e Schizachyrium tenerum as espécies dominantes. A análise de agrupamentos e de ordenação revelou conexões entre variação da vegetação e fatores altitude e exposição solar. Aristida laevis e Sorghastrum albescens são características de comunidades mais expostas à radiação solar, enquanto Agenium villosum e Eryngium eriophorum o são de comunidades menos expostas. Vernonia nudiflora e Axonopus suffultus caracterizam as áreas mais elevadas do morro, enquanto Eupatoriitm ligulifolium e Sorghastrum albescens as mais baixas. We studied floristic composition variation and its conections to elevation and exposure in the grassland vegetation of Morro da Polícia, a hill of granitic origin in the city of Porto Alegre, Rio Grande do Sul, 30ºS e 51 ºW. The survey took place from November 1992 to November 1994. Species presence and frequency were assessed by using the point method on transects in 19 vegetation units, which were delimited by slope exposure and elevation (160 to 280m). Data were subjected to cluster analysis and ordination. Based on data from transects we detected 189 species, mainly from the Poaceae, Asteraceae and Apiaceae families, with Trachypogon montufari and Schizachyrium tenerum as dominant species. Cluster analysis and ordination revealed conections of vegetation variation with elevation and exposure. Aristida laevis and Sorghastrum albescens are characteristic of more exposed comunities (N and NE slopes), while Agenium villosum and Eryngium eriophorum are from less exposed communities (on S and SW slopes). Vernonia nudiflora and Axonopus suffultus are characteristic of higher elevation areas on the hill, while Eupatorium ligulifolium and Sorghastrum albescens are characteristic of lower elevation areas.