Utricularia guyanensis Candolle (1844: 11–12)

Costa, Suzana M., Bittrich, Volker & Do Amaral, Maria Do Carmo E., 2016, Lentibulariaceae from the Viruá National Park in the northern Amazon, Roraima, Brazil, Phytotaxa 258 (1), pp. 1-25 : 13

publication ID

https://doi.org/ 10.11646/phytotaxa.258.1.1

DOI

https://doi.org/10.5281/zenodo.13673204

persistent identifier

https://treatment.plazi.org/id/03B487D2-FFF7-587B-FF0A-FBB1FBA9F801

treatment provided by

Felipe

scientific name

Utricularia guyanensis Candolle (1844: 11–12)
status

 

9. Utricularia guyanensis Candolle (1844: 11–12) View in CoL ( Fig. 4 View FIGURE 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 View FIGURE 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!) .

M

Botanische Staatssammlung München

C

University of Copenhagen

E

Royal Botanic Garden Edinburgh

F

Field Museum of Natural History, Botany Department

INPA

Instituto Nacional de Pesquisas da Amazonia

UEC

Universidade Estadual de Campinas

S

Department of Botany, Swedish Museum of Natural History

T

Tavera, Department of Geology and Geophysics

N

Nanjing University

K

Royal Botanic Gardens

G

Conservatoire et Jardin botaniques de la Ville de Genève

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