Utricularia guyanensis Candolle 1844
Creators: name: Costa, Suzana M.
name: Bittrich, Volker
name: Do Amaral, Maria Do Carmo E.
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Lamiales
Lentibulariaceae
Utricularia
Utricularia guyanensis

description: 9. Utricularia guyanensis Candolle (1844: 11–12) (Fig. 4: B–C)   
Marsh herbs, up to 20 cm tall.Stolons and vegetative parts glabrous. Leaves (not seen); traps lateral, without appendages. Inflorescence erect, up to 10-flowered, flowers ca. 1 cm distant from each other. Peduncle greenish or reddish; lateral spongy floats absent. Sterile bracts up to 1 mm long, basifixed, ovate, margin entire, equally distributed along the peduncle. Bract up to 1 × ca. 1.2 mm, basifixed, broadly ovate, margin entire, sometimes with a prominent nerve. Bracteoles <1 mm long, lanceolate, apex acute, margin entire. Pedicels up to 1 mm, shorter than calyx lobes. Calyx lobes equal, margin entire, green to yellow, apex reddish, without prominent nerves; upper lobe 2 × 2 mm, lanceolate, apex acute to rounded; lower lobe 2 × 1.5 mm, lanceolate, apex acute to rounded. Corolla yellow; upper lip 2.5 × 2 mm, ovate; lower lip 4 × 4 mm, orbicular, apex obscurely bilobed; spur up to 1 × 1 mm, cuneiform (wedge-shaped), always shorter than the lower lip of corolla and not forming an angle of 90º with the latter in a lateral view. Style and filaments elongate; filaments acutely bent in the middle, more or less parallel with inner surface of spur. Capsule ellipsoid, dehiscing by a ventral pore. Seeds numerous, ovoid, with reticulate surface, testa cells isodiametric, elliptic to circular.  
 Distribution:—We present the first record of Utricularia guyanensis for Roraima. This species occurs in northern South America and Central America (Taylor 1989); in Brazil it occurs in the northern, northeastern and central-western regions (Miranda et al. 2016). It grows in sandy, humid and saturated soils (Taylor 1989), and in the Viruá National Park it was collected in grassy white-sand savannas with saturated soils.   
 Taxonomic notes:—According to Taylor (1989), the leaves of this species are filiform with acute apex, 0.3–0.4 mm wide; the peduncle is generally blackish after drying. Utricularia guyanensis differs from other species in the genus by the cuneiform (wedge-shaped) spur, elongated style and stamens, and the position of the style and stamen along the spur (Fig. 4: B–C).   
 Specimens:— BRAZIL. Roraima, Caracaraí, Viruá National Park: “Estrada Perdida”, 20 January 2011, M. C. E. Amaral 2011-27, C. F. Silva (INPA!, UEC!); “Estrada Perdida”, 16 September 2010, S. M. Costa 756, T.D. M. Barbosa, F. N. Cabral (INPA!, UEC!); “ Estrada Perdida ”, 25 January 2011, S. M. Costa 897, K. G. Cangani (INPA!, UEC!); PPBio grid L4 / N4, 20 March 2011, S. M. Costa 919, T.D. M. Barbosa (INPA!, UEC!).
description: Published as part of Costa, Suzana M., Bittrich, Volker & Do Amaral, Maria Do Carmo E., 2016, Lentibulariaceae from the Viruá National Park in the northern Amazon, Roraima, Brazil, pp. 1-25 in Phytotaxa 258 (1) on page 13, DOI: 10.11646/phytotaxa.258.1.1, http://zenodo.org/record/13673170