Utricularia juncea Vahl (1804: 202)

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 : 15-16

publication ID

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

DOI

https://doi.org/10.5281/zenodo.13673214

persistent identifier

https://treatment.plazi.org/id/03B487D2-FFF5-5878-FF0A-F83DFE49FCA5

treatment provided by

Felipe

scientific name

Utricularia juncea Vahl (1804: 202)
status

 

12. Utricularia juncea Vahl (1804: 202) View in CoL ( Fig. 4 View FIGURE 4 : J–L)

Marsh herbs, up to 30 cm tall. Stolons and vegetative parts glabrous. Leaves nearly 0.3 mm wide, filiform. Traps lateral, without appendages. Inflorescence erect, up to 10-flowered, flowers up to 1.2 cm distant from each other. Peduncle greenish, lateral spongy floats absent. Sterile bracts up to 2 mm long, basifixed, lanceolate, apex acute, equally distributed. Pedicels 2 mm long, shorter than the calyx lobes. Bract up to 1 × ca. 1 mm, basifixed, ovate, apex acute, margin entire, 1 or 3 prominent nerves. Bracteoles up to 1 × ca. 0.3 mm, basifixed, filiform, apex acute, margin entire, one prominent nerve. Calyx lobes unequal, margin entire, 7 or 8 prominent nerves, green; upper lobe 4 × 2.5 mm, lanceolate, apex acute and curved; lower lobe 3 × 2 mm, lanceolate, apex acute, bifid or trifid. Corolla yellow; upper lip 3 × 3 mm, obovate; lower lip 5 × 6 mm, orbicular, apex obscurely bilobed; spur 5 × 1 mm, cylindrical, apex acute, as long as the lower lip of corolla and forming an angle of ca. 90° with the latter in lateral view. Style and filaments short. Capsule globose to elliptic, dehiscing by a longitudinal ventral slit. Seeds numerous, ovoid, surface reticulate, testa cells tiny, elliptic to circular.

Distribution:—This species occurs in North and Central America and in northern South America ( Taylor 1989) and tropical Africa ( Dörrstock et al. 1996). In Brazil U. juncea occurs in the northern and northeastern regions ( Miranda et al. 2016). It is found in humid savannas, marshes, lakes and pools, and frequent in shallow waters ( Taylor 1989). In the VNP the species grows in areas of grassy white-sand savannas with saturated soils.

Taxonomic notes:— Utricularia juncea is characterized by its height of up to 30 cm, by the visible nerves on the calyx lobes and the angle formed by the spur and lower lip of the corolla (∀= 90°).

Specimens:— BRAZIL. Roraima, Caracaraí, Viruá National Park : PPBio grid L1 - L2 / N2 - N3, 15 September 2010, S. M. Costa et al. 746 ( INPA!, UEC!) ; “ Estrada Perdida ”, 16 September 2010, S. M. Costa 760, F. N. Cabral ( INPA!, UEC!) ; “ Estrada Perdida ”, 19 January 2011, S. M. Costa et al. 826 ( INPA!, UEC!) ; PPBio grid N3 / L1 - L2 , 24 January 2011, S. M. Costa 868, K. G. Cangani ( INPA!, UEC!) ; “ Estrada Perdida ”, 25 January 2011, S. M. Costa 874, K. G. Cangani ( INPA!, UEC!) .

S

Department of Botany, Swedish Museum of Natural History

M

Botanische Staatssammlung München

INPA

Instituto Nacional de Pesquisas da Amazonia

UEC

Universidade Estadual de Campinas

F

Field Museum of Natural History, Botany Department

N

Nanjing University

K

Royal Botanic Gardens

G

Conservatoire et Jardin botaniques de la Ville de Genève

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