A new <i>Jacquemontia</i> Choisy (Convolvulaceae) species from the Brazilian Amazon forest

BELO, Deibson Pereira; BURIL, Maria Teresa; ARRUDA, Emília; LOUZADA, Rafael Batista

doi:10.1590/1809-4392202300341

Deibson Pereira BELO ^** Corresponding author: deibson.belo@gmail.com

Universidade Federal de Pernambuco. Centro de Biociências, Departamento de Botânica, Programa de Pós-graduação em Biologia Vegetal, Laboratório de Morfo-Taxonomia Vegetal, Av. Professor Moraes Rego, s/n, Cidade Universitária, Recife, PE, Brazil

Universidade Federal Rural de Pernambuco, Departamento de Biologia, Programa de Pós-graduação em Biodiversidade, Laboratório de Sistemática Integrativa, Rua Dom Manuel de Medeiros, s/n, Dois Irmãos, Recife, PE, Brazil

https://orcid.org/0000-0001-6618-3223

Maria Teresa BURIL

Universidade Federal Rural de Pernambuco, Departamento de Biologia, Programa de Pós-graduação em Biodiversidade, Laboratório de Sistemática Integrativa, Rua Dom Manuel de Medeiros, s/n, Dois Irmãos, Recife, PE, Brazil

Emília ARRUDA

Universidade Federal de Pernambuco. Centro de Biociências, Departamento de Botânica, Programa de Pós-graduação em Biologia Vegetal, Laboratório de Morfo-Taxonomia Vegetal, Av. Professor Moraes Rego, s/n, Cidade Universitária, Recife, PE, Brazil

Rafael Batista LOUZADA

Universidade Federal de Pernambuco. Centro de Biociências, Departamento de Botânica, Programa de Pós-graduação em Biologia Vegetal, Laboratório de Morfo-Taxonomia Vegetal, Av. Professor Moraes Rego, s/n, Cidade Universitária, Recife, PE, Brazil

* Corresponding author: deibson.belo@gmail.com

ASSOCIATE EDITOR:

Natalia Ivanauskas

Figures (5)
Tables (1)

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Figure 1
Collection site (red dot) of Jacquemontia ferricola sp. nov. in Carajás National Forest, Pará state, Brazil. The brown areas below the collection site (red dot) indicate a mining zone. This figure is in color in the electronic version.

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Figure 2
Jacquemontia ferricola sp. nov. A - habit and color of flowers; B - inflorescence and outer bracteoles; C - sepals. Abbreviations: br = bracteoles. Credits: Eder Barbier and Deibson Belo. This figure is in color in the electronic version.

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Figure 3
Jacquemontia ferricola sp. nov. A - branch with inflorescence; B - leaf and petiole; C - detail of trichomes on adaxial leaf surface and petiole; D - trichomes 3-armed; E - inflorescence and outer bracteoles; F - sepals; G - corolla inner surface; H - flower, lateral view; I - gynoecium; J - stamen. Illustrations by Regina Carvalho. This figure is in color in the electronic version.

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Figure 4
Jacquemontia ferricola sp. nov. view by scanning electron microscopy. A - adaxial surface and leaf margin with stellate trichomes, 3-armed, and sessile peltate glandular trichomes; B - abaxial surface and leaf margin with stellate trichomes, 3-armed, and sessile peltate glandular trichomes; C - trichomes stellate, 3-armed, and sessile peltate glandular trichomes, and anisocytic stomata in adaxial surface; D - striate stem with stellate trichomes, 3-armed; E - striate petiole with stellate trichomes, 3-armed; F - peduncle with stellate trichomes 3-armed; G - pedicel with stellate trichomes, 3-armed; H - sepals glabrescent with sessile peltate glandular trichomes. Abbreviations: Mg = leaf margin; St = stomata; STr = stellate trichome; GTr = sessile peltate glandular trichome. Credits: Hianna Fagundes.

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Figure 5
Paradermic and transverse sections of the leaves and stems of Jacquemontia ferricola sp. nov. A - adaxial epidermis with sinuous cell walls and anisocytic stomata; B - abaxial epidermis with sinuous cell walls and anisocytic stomata; C - stellate trichome, 3-armed in adaxial epidermis; D - petiole shape - flat-convex; E - main vascular bundles; F - stem in secondary growth presenting a circular shape with the uniseriate epidermis, sclerenchyma fibers involving the phloem, and xylem presenting vessel elements. Abbreviations: St = stomata; Tr = trichome stellate; Vb = vascular bundle; Pf = fundamental parenchyma; Xy = xylem; Ph = phloem; Ep = epidermis; Col = collenchyma; Fs = sclerenchyma fibers; Pm = medullary parenchyma. Scale bars: A, B = 50 µm; C = 100 µm; D = 500 µm; E, F = 100 µm. Credits: Deibson Belo. This figure is in color in the electronic version.

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Table 1
Comparison among Jacquemontia ferricola sp. nov. (Convolvulaceae) and seven morphologically similar congeneric species.

Character	J. ferricola sp.nov.	J. acuminata	J. bifida	J. bracteosa	J. cataractae	J. glabrescens	J. guyanensis	J. pentanthos
Leaf apex	Acuminate to caudate	Atenuate to acute	Acute to acuminate	Retuse to obtuse, mucronate	Acute	Acuminate	Obtuse to acute, mucronate	Apiculate, acute or obtuse, mucronate
Leaf indumentum	Glabrescent to pubescent	Tomentose to velutinous	Pubescent	Velutinous	Glabrescent to pubescent	Velutinous	Lanate, ferrugineous when dried	Pubescent to tomentose
Outer bracteoles	Linear, 4.3-8.1 × 0.5-1.5 mm, glabrescent	Lanceolate, 15-20 × 2-3 mm, tomentose	Absent	Absent	Lanceolate, 14-20 × 2-4 mm, glabrous	Lanceolate, 17-20 × 2-3 mm, velutinous	Absent	Absent
Bracteoles	Linear, 3.6-5 × 0.4-0.5 mm, glabrous	Linear, 3-4 × 0.5 mm, tomentose	Linear, 3-7 × 0.5 mm, pubescent	Lanceolate, 10×5 mm	Linear, 8×1.5 mm, glabrous	Lanceolate, 7-8 × 1 mm, pubescent	Linear, 8×1 mm, pubescent	Rhombic to elliptic, 10-24 × 1-2 mm, pubescent
Outer sepal shape and size	Rhombic, 7.9-8 × 4.2-4.7 mm	Oval, 8×3 mm	Ovate to rotund, 5-14 × 4-12 mm	Lanceolate to ovate, 7-8 × 3-5 mm	Lanceolate, 6×2.5 mm	Rhombic to ovate, 9-11 × 5-6 mm	Rhombic, 5-8 × 2-2.5 mm	Ovate to lanceolate, 4.5-9 × 2-5 mm
Outer sepal base	Truncate	Rounded	Cordate	Rounded	Rounded	Rounded	Truncate	Cuneate to rounded
Outer sepal apex	Acuminate to caudate	Acuminate	Acute to acuminate	Caudate	Acute	Acute to acuminate	Acute to acuminate	Acute
Outer sepal indumentum	Glabrescent with sessile peltate glandular trichomes	Tomentose	Trichomes in the medium region	Velutinous	Glabrous	Glabrescent without sessile peltate glandular trichomes	Lanate	Pubescent
Margin of outer sepals	Sinuate	Scarious	Entire	Sinuate	Ciliate	Ciliate	Scarious	Entire
Corolla color, length	White, ca. 10 mm	Purple, ca. 15 mm	Blue, 10-15 mm	White, 22-31 mm	Blue, ca. 20 mm	Blue, 16-20 mm	White, 15-18 mm	White or blue, 15-20 mm
Distribution	Brazil: Pará state (Amazon Forest)	Endemic Bolivia	Brazil to Argentina	Endemic Brazil	Argentina, south Brazil	South and southeast Brazil	Guianas, Venezuela, Brazil, on the borders of the Amazon forest	Mexico to Argentina

[1] * Corresponding author: deibson.belo@gmail.com

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A new Jacquemontia Choisy (Convolvulaceae) species from the Brazilian Amazon forest

ABSTRACT