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| Material selected. Herbertia amatorum URUGUAY: Durazno, Villasboas, in campis, 19 November 1902, C. Osten 4294 (MVM). Paysandú. Ruta 26, 24 October 2015, L. P. Deble & A. S. de Oliveira 15633 (PACA). Herbertia crosae. BRAZIL. Rio Grande do Sul: Barra do Quaraí, on grasslands of few developed soils and stony, 13 October 2012, L. P. Deble 13996 et al. (PACA); on grasslands 8 km N Parque Estadual do Espinilho, 17 November 2012, L. P. Deble 13998 et al. (PACA). URUGUAY. Artigas: Bella Union, in grassy, stony places, 6 November 2002, G. Roitman & G. M. Tourn s.n. (BAA); on stony grasslands, growing with H. quareimana, 14 October 2012, L. P. Deble 13995 et al. (PACA). Salto: 5 October 1898, C. Osten 3132 (MVM). Herbertia pulchella. BRAZIL. Rio Grande do Sul: Arroio dos Ratos, Fazenda Faxinal, flor azul, planta comum em campo seco, 27 October 1980, K. Hagelung 13441 (ICN). Bagé, Morro Bagé, on grasslands, 10 October 2007, L. P. Deble 7458 (PACA). Caçapava do Sul, Parque das Guaritas, campo, corola lilás, 30053 ”33’2” S 53025 ”52’6”W, 5 October 2007, P. P. A. Ferreira 25 (ICN). Viamão, Parque Estadual de Itapuã, morro do Araçá, campo rupestre, October 2003, M. Pinheiro 436 (ICN). Without precise local, F. Sellow 97 (P). Herbertia quareimana. BRAZIL. Rio Grande do Sul: Quaraí, “Culta in Bonaria ex bulbis in campis pr Quarai civit Rio Grande do Sul Brasiliae” P.F. Ravenna 999 (MVM). URUGUAY. Artigas, entre Tomás Gomemsoro y Baltazar Brum, 13 October 1972, Del Puerto & E. Marchesi s.n. (MVFA 11470). Cuareim, 25 September 1901, M.B. Berro 1661 (MVFA). Trés Cerros, nascientes del arroyo Pintado, 29 October 1991, Brescia et al. s.n. (MVFA 22023). Rivera, Campos de Cuchilla Negra, J. Arechavaleta s.n. (MVFA 18444). Herbertia zebrina. Brazil. Rio Grande do Sul: Amaral Ferrador, “próximo a divisa com Encruzilhada do Sul, propriedade da Pinheira, cerro pedregoso, na subida para o topo”, 30° 39’ 55” S, 52° 23’ 59” W, 21 December 2008, L. P. Deble et al. 10844 (SI). Encruzilhada do Sul, Coxilha do Vento, 27 December 2008, L. P. Deble et al. 10845 (SI, CTES); 4 January 2009, L. P. Deble et al. 10846 (CTES). |
| Plant height (cm) | 10–18 | 8–22 | 8–15 | 12–25 | 15–35 | 10–20 |
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| Shape and size of leaves (cm) | narrowly linear- elliptic or linear- lanceolate, 9–18 × 0.2–0.4 | narrowly linear, 4–11 × 0.1–0.2 | linear, 7–16 × 0.1–0.2 | linear-lanceolate or elliptic-lanceolate, 10–18 × 0.3–0.8 | linear-lanceolate or elliptic-lanceolate, 12–35 × 0.6–1.5 | narrowly linear, 7–12 × 0.2–0.3 |
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| Shape and size of spathes (cm) | fusiform, 3.4–4.5 × 0.3–0.5 | narrowly fusiform, 2.5–3.3 × 0.2–0.4 | narrowly fusiform, 2.2–3.4 × 0.2–0.4 | turbinate, 3.5–4.5 × 0.4–0.6 | turbinate, 4.4–6 × 0.4–0.8 | narrowly fusiform, 1.9–2.8 × ca. 0.2 |
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| Perigone diameter (cm) | 4–5 | 2.5–3.5 | 3–4 | 4–5.5 | 6–7 | 3–4.5 |
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| Shape and size of outer tepals (mm) | oblanceolate or oblong-spathulate, revolute, 22–30 × 11–18 | obovate or spathulate, 15–22 × 10–14 | obovate-oblong, 18–24 × 9–12 | oblong-spathulate, 29–40 × 15–22 | obovate, 30–40 × 21–30 | obovate or obovate-oblong, 15–19 × 9–11 |
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| Color pattern of the outer tepals | claws white and yellow, blade porcelain dark violet or dark violet-blue, with or without a white longitudinal central stripe | claws with a yellow triangular spot, with a white or cream outline, and parallel lilac stripes, blade pale lilac | claws opaline-white, with dark-blue stripes and dots, blade porcelain dark violet or dark violet-blue | claws white or bright blue, blade porcelain dark violet, dark violet-blue or blue with a white longitudinal central stripe | claws opaline-white, with dark-blue stripes and dots, blade porcelain dark violet or dark violet-blue | claws with a yellow triangular spot, with a white outline, and parallel violet stripes, blade white |
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| Distribution and abundance of lipidic trichomes over the outer tepals | abundant, forming a heart-shaped carpet, along the claw and ending near at the base of the blade | abundant, forming a triangular carpet, along the claw and ending near at the base of the blade | scattered near at the base of the blade | abundant, forming a heart-shaped carpet, extending along the claw and ending near at the base of the blade | scattered near at the base of the blade | abundant, forming a narrowly triangular carpet, along the claw and ending near at the base of the blade |
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| Shape and size of inner tepals (mm) | oblong, 9–11 × ca. 2 | spathulate or elliptic, 5–6 × 2–3 | oblong, 8–9 × 2–3 | oblanceolate, 10–12 × 2.5–3.5 | ovate, ovatelanceolate or ellipticlanceolate, 12–16 × 5–6 mm | broadly spathulate, 6–7 × 4–5 |
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| Color pattern of the inner tepals | dark violet-blue, with central concavity dark- purple and yellow stained | lilac, with central concavity with a yellow triangular spot | violet or violet-blue, with central concavity with a transverse medial stripe yellow and purple spotted | dark violet-blue or dark blue, with central concavity of the same color | dark violet-blue, with central concavity darker | white and dark purple striped, central concavity with a yellow spot and with darkpurple outline |
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| Distribution and abundance of lipidic trichomes over the inner tepals | abundant, along the central concavity | abundant, along the central concavity | abundant, along the central concavity | scarce, in two lateral bands of the central concavity | abundant, along the central concavity | abundant, along the central concavity |
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| Filaments length (mm) | 7–11, free apically for 2.5–3.5 mm | 5–6.5, free apically for 1–1.5 mm | 9–12.5, free apically for 2–3.5 mm | 7–12, free apically for 2.5–4 mm | 9–12, free apically for 1–2 mm | 6–9, free apically for 1.5–2.5 mm |
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| Anthers length (mm) | 6–7 | 4–5 | 5–6 | 6–8 | 10–11 | 2.3–2.8 |
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| Unbranched part of style length (mm) | 5–7 | 4–5 | 7–10 | 6–8 | 8–10 | 5–6.5 |
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| Style branches length (mm) | 7–8 | 3.5–4.5 | 3.5–4 | 8–10 | 7–10 | 3.5–4.5 |
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| Shape and size of capsules (mm) | obovate-oblong, 9–14 × 5–8 | broadly clavate, 8–11 × 6–8 | nearly spherical or broadly clavate, 6–11 × 4.5–6 | obovate-oblong, 10–16 × 5–8 | clavate, 10–12 × 5–6 | broadly oblong, 6–9 × 4–5 |
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| Size of seeds (mm) | 1.6–2.5 | 1.2–1.6 | 0.8–1.4 | 2–2.5 | 1.5–2 | 0.9–1.3 |
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