Valeriana iganciana (Valerianaceae), a new species from the highland grasslands of Serra do Tabuleiro, Santa Catarina, Brazil Author Silva, Cassio Rabuske Da Universidade Federal do Rio Grande do Sul, Programa de Pós-Graduação em Botânica, Av. Bento Gonçalves, 9500, Agronomia, Porto Alegre-RS, Brazil. Author Külkamp, Josimar Escola Nacional de Botânica Tropical, Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, R. Pacheco Leão 2040, 22460 - 030, Rio de Janeiro-RJ, Brazil. text Phytotaxa 2018 2018-08-14 364 3 275 282 http://dx.doi.org/10.11646/phytotaxa.364.3.7 journal article 10.11646/phytotaxa.364.3.7 1179-3163 13704617 Identification key to the species of Valeriana in the state of Santa Catarina 1. Prostrate, erect, or decumbent species; achene with vestigial, annular or slightly dentate calyx......................................................2 - Voluble or climbering species; achene with pappus-like calyx......................................................................................... V. scandens 2. Distal leaves pinnatisect or pinnatilobed............................................................................................................................................3 - Distal leaves entire (at most with a pair of basal lobes).....................................................................................................................4 3. Lobes linear, 5–8 (12) pairs, 25–50 mm long, terminal lobe similar in shape and size to the lateral ones; achene elliptical, pubescent, with rounded apex and annular to slightly dentate calyx ............................................................................... V. tajuvensis - Lobes 1–4 pairs, up to 20 mm long, the terminal lobe larger than the lateral ones; achene ovate, glabrous (rarely pubescent) with valeculate apex and vestigial calyx ............................................................................................................................ V. catharinensis 4. Leaves linear, elliptic, lanceolate, obovate or oblanceolate, with entire or dentate margin; achene glabrous...................................5 - Leaves orbicular to reniform with crenate margin; achene densely hairy.................................................................. V. glechomifolia 5. Rhizomes and branches woody; distal leaves elliptic, lanceolate, obovate or oblanceolate; inhabit rocky outcrops and hillsides...6 - Rhizomes and branches herbaceous; distal leaves linear-lanceolate to oblong-lanceolate; common in marshes....... V. salicariifolia 6. Branches starting directly from the base or slightly above the thickened rhizomes; proximal leaves with truncated and praemorse apex, sessile, eventually with a pair of basal lobes............................................................................................................................7 - Single branches in early individuals and profusely branched in late phenophases, without thickened rhizomes; proximal leaves with rounded, obtuse, acute or acuminate apex, petiolate to pseudopetiolate (eventually sessile), petioles 10–18 (24) mm long, without basal lobes.............................................................................................................................................................................8 7. Leaves coriaceous, wrinkled in dry material; inflorescences with paniculiform paracladia; achene elliptic-globose, up to 1.5 × 1 mm , 5-costate, with dentate calyx .................................................................................................................................. V. eichleriana - Leaves chartaceous, never wrinkled in dry material; inflorescences with glomeruliform paracladia; achene globose, larger than 1.8 × 1.6 mm , 3-costate, with vestigial calyx........................................................................................................................... V. reitziana 8. Leaves with dentate margins, teeth 3–4 mm long; achenes elliptic-globose, biconvex, up to 2 mm long, with emarginate apex and vestigial calyx............................................................................................................................................................................. V. ulei - Leaves with entire margins, at most with 1–3 (4) pairs of teeth inconspicuous and restricted to the apical portion; achenes elliptical, triquetrous, 4 mm long, with acute apex and annular to slightly dentate calyx ............................................................... V. iganciana