A New Species of Guadua, G. calderoniana (Poaceae: Bambuseae), with Notes on the Genus in Bahia, Brazil Ximena LondoTno and Emmet J. JudziewiczInstituto Vallecaucano de Investigaciones Cientificas-INCIVA, Apartado Aereo 5660, Cali, Colombia; Department of Botany (NHB-166), National Museum of Natural History, Smithsonian Institution, Washington, D.C. 20560, U.S.A. Guadua Kunth (Poaceae: Bambusoideae: Bam-buseae) is a genus of ca. 25-30 species occurringin forests and savannas from Mexico and northernSouth America to Paraguay and Argentina, with acenter of diversity in western Amazonia and theOrinoco basin (McClure, 1973; Young, 1985; Sod-erstrom & Londono, 1987, 1988). Until now, nonamed species have been reported from Bahia, Brazil(Renvoize, 1984). However, study of collections madeby C. E. Calderon and T. R. Soderstrom have en-abled us to identify three species of Guadua fromthe state: G. paniculata Munro, G. tagoara (Nees)Kunth, and a new taxon herein described and illus-trated. We provide a key to all Bahian represen-tatives of the genus, along with descriptions (ter-minology follows that of Soderstrom & Londoiio,1988) and lists of specimens examined.Key to the species of Guadua from Bahia, Brazil(based only on Bahian material)la. Culms robust, 6-10(-15) cm diam.; culm leaf blades broadly triangular, at most as long as the sheat.as; foliage leaf blades 21-30 x 3-7 cm .................... ...... 3. G. tagoaralb. Culm:s more slender, 2-6 cm diam.; culm leaf blades narrowly triangular, usually longer than the sheath; foliage leaf blades 14-27 x 0.7-3.7 cm. 2a. Foliage leaf blades 15-27 x 2-3.7 cm, ovate-to oblong-lanceolate; sheaths with prominent auricles 5-10 mm long, bearing prominent setae 15-25 mm long; wings of the palea keels glabrous, smooth, ca. 1 mm wide; culm leaf blades persistent ....... ...................... 1. G. calderoniana 2b. Foliage leaf blades 14-18 x 0.7-1 cm, linear-lanceolate; sheaths rarely auriculate (auricles if present less than 5 mm long), bearing setae only 8-10 mm long; wings cf the palea keels silky-pubescent, ciliolate, less than 0.4 mm wide; culm leaf blades caducous ................ 2. G. paniculata1. Guadua calderoniana Londoiio & Judziewicz, sp. nov. TYPE: Brazil. Bahia: Mun. Ilheus, ca. 30 km SW of Olivenca on road to Vila Brasil, near Rio Maroim, in flower, 22 Feb. 1979, C. E. Calderon & T. S. dos Santos 2476 (holo-type, CEPEC; isotypes, B, CANB, COL, CTES, F, G, ISC, K, LE, MO, NY, P, PE, PRE, SGO, SI, SP, TULV, US-3 sheets, USCH, W, WIS). Figures 1, 2. Bambusa lignosa spinosa 10-20 m x 2-3.5 cm; in-ternodia firma, fere solida. Folia culmorum coriacea; lam-ina persistens, erecta, plerumque lanceolato-triangulata,20-35 cm longa. Ramificatio intravaginalis. Folia incomplemento 12-15; vagina pubescens biauriculata, au-riculis falcato-lanceolatis prominentibus longisetosis; setaecopiosae, patulae, 15-25 mm longae; lamina ovata-lan-ceolata vel oblongo-lanceolata, 15-27 x 2-3.7 cm. Syn-florescentiae indeterminatae, terminales. Pseudospiculaelanceolatae, robustae, erectae, bracteis subtendentibussingulis, prophyllo singuli, bracteis gemmiferis 2-4, brac-teis vacuis plerumque 1 raro 2, lemma fertilia singulacum rudimento paleae; flosculis 4-10; lemma ovato-lan-ceolatum, 17-27 mm longum, 23-27-nervatum, dorsal-iter breviter hirsutulum; palea glabra carinis alatis 2, alis1 mm latis. Lodiculae 3. Stamina 6, filamentis liberis.Ovarium fusiforme, sursum breviter pubescens; stylussingulus; stigmata tria plumosa. Fructus cariopsis. Densely unicespitose woody, thorny bamboo. Rhizomes sympodial, pachymorph. Culms green, erect when young, bending or arching after devel-oping foliage leaves, 10-20 m tall, 2-3.5 cm diam., sometimes leaning on or pendent from trees; inter-nodes 30-35 cm long, terete, smooth or slightly roughened, solid or nearly so with very thick walls and a small central lumen; nodes solitary, the sides parallel in longitudinal section, the single nodal line horizontal, an upper nodal ridge also manifest, a dense but inconspicuous band of ca. 1 mm long, appressed, tawny hairs extending about 5 mm below and 10 mm above the nodal line; bud solitary, cov-ered by a prophyllum, positioned between the nodal line and the upper nodal ridge, not elevated on a promontory. Culm leaves coriaceous, light beige in color when young, later stramineous and deciduous, 30-60 x 7-13 cm (basal width); sheath densely strigose abaxially, covered with short, hard, brown or hyaline persistent hairs, shiny and glabrous adax-ially, 20-28.5 x 8-11 cm, the summit slightly NovoN 1: 27-32. 1991
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