Taxonomic revision of Pachyptera (Bignonieae, Bignoniaceae) Author Francisco, Jessica Nayara Carvalho Author Lohmann, Lucia G. text PhytoKeys 2018 92 89 131 http://dx.doi.org/10.3897/phytokeys.92.20987 journal article http://dx.doi.org/10.3897/phytokeys.92.20987 1314-2003-92-89 FFFB4965FFECEF2BD9660A7E9A7EFFBE 1166343 5. Pachyptera linearis Francisco & L.G.Lohmann sp. nov. Fig. 13 Type. Colombia. Meta: Parque Nacional Natural Tinigua, Serrania Chamusa Centro de Investigacion Primatologicas La Macarena, 120 m, Apr 1992, fr., P. Stevenson 403 (holotype: MO088944!; isotypes, COL000349706!, COAH21210, not seen). Diagnosis. Pachyptera linearis is similar to Pachyptera kerere , but can be distinguished by the linear and flattened capsule (vs. the fusiform and inflated capsule of P. kerere ), inconspicuous longitudinal midline on each valve (vs. conspicuous and raised longitudinal midline on each valve of P. kerere ) and thin, oblong and wingless seeds (vs. corky, irregularly circular, obcordate and wingless seeds of P. kerere ). Description . Liana ; stems solid, tetragonal (cylindrical in younger portions), with greyish striations, lenticellate; prophylls of axillary buds 3-seriated, flattened and ensiform. Leaves with blades discolorous or concolor, membranaceous to chartaceous, elliptic, obovate-lanceolate, asymmetric, apex acute, acuminate, base cordate, lateral blades 6.0-12.4 x 3.0-4.9 cm, apical blades 8.0-14.7 x 3.4-6.0 cm; petiole semi-cylindrical, 1.0-4.2 cm long, petiolules not puvinated, lateral petiolules 0.5-1.6 cm long, apical petiolules 1.5-3.5 cm long. Inflorescence a congested raceme, 0.6-1.2 cm long; pedicel ca. 0.8 cm long; bracts ca. 0.7 mm long; bracteoles cymbiform, ca. 0.7 mm. Calyx green, tubular, minutely 5-lobed, 0.9 x 0.8 cm. Corolla white, infundibuliform, ca. 6.7 cm long, ca. 1.4 cm of diameter at the tube mouth; lobes rounded, 0.8 x 0.9 cm. Androecium with the longer stamens ca. 32.0 mm long, the shorter stamens ca. 10.9 mm long, glabrous; anthers villous, included, thecae curved forward, 2.5 x 0.9 mm; pollen 3-colpate, microreticulate. Gynoecium 5.0-5.2 cm long; ovary 2.9-4.0 x 1.2 mm, cylindrical, not-sulcate, smooth, sparsely to moderately pubescent, with simple trichomes, sparsely lepidote, with glandular peltate trichomes, without patelliform glandular trichomes; stigma capitate or ovate, 1.7-2.8 x 1.7-2.8 mm; nectar disc 1.8 x 2.0 mm. Capsule linear, flattened, 19.0-35.0 x 2.2-2.4 cm, each valve with an inconspicuous longitudinal midline; seeds oblong, 4.0-7.0 x 1.5-1.8 cm, thin, not-corky, coriaceous to woody, striated, secondary sculpture regularly interrupted by lateral rays, wingless, with short membranaceous or chartaceous and hyaline wings. Figure 13. Pachyptera linearis . A Flowering branch B Interpetiolar region with ENFs and prophylls of axillary buds 3-seriated, flattened and ensiform C Branchlets with terminal leaflet replaced by trifid tendril (leaflet fells) D Trifid tentril E Flower F Calyx external view G Open flower showing the androecium with anthers united H Stamen with villous and curved thecae I Gynoecium J Ovary surface pubescent (J.J. Wurdack 41357, K) K Fruit flattened, with an inconspicuous longitudinal midline L Seeds wingless (P. Stevenson 403, MO). Distribution . Pachyptera linearis is only known from wet forests of Venezuela (Apure, Bolivar ) and Colombia (Meta). Fig. 14 . Phenology. Pachyptera linearis flowers in January and fruits in April. Etymology. The epithet linearis makes reference to the linear fruit. Figure 14. Distribution of Pachyptera linearis . Nomenclatural note. Pachyptera linearis is a new species described here based on new morphological and molecular phylogenetic data (Fig. 1 ; Francisco and Lohmann submitted). The best quality material was selected as the holotype. Taxonomic comments. Pachyptera linearis is characterised by white and infundibuliform corollas, with a sparsely pubescent and sparsely lepidote ovary. Furthermore, the capsule is linear, flattened, coriaceous to woody, with an inconspicuous longitudinal midline on the valves. The seeds are oblong, thin, coriaceous to woody, winged, with short membranaceous or coriaceous and hyaline wings. Pachyptera linearis shares the white infundibuliform flowers with its sister species P. kerere (Fig. 1 ). Nevertheless, P. linearis is easily distinguible from P. kerere by the fruit morphology. Paratypes. VENEZUELA. Apure : galeras del Cinaruco, Rio Cinaruco, 29 km above Las Galeras de Cinaruco, 80 m, 24 Jan 1956, fl., J.J. Wurdack 41357 (K, MO, RB, S, VEN). Bolivar : Moitaco, rebalse del Orinoco, Hato Curumutopo, 8°00'00.0"N , 64°21'36.0"W , 24 Apr 1991, fr., G. Martino 22 (MO).