Macrophytes of the Capitão Poço river micro-basin, State of Pará, Eastern Amazon, Brazil: floristic composition and identification key for the species

Carvalho, Lucimar Silva; Soares, Witalo Cleidson Rodrigues; Barberena, Felipe Fajardo Villela Antolin; Comassetto, Thaisa Pegoraro

doi:10.1590/2236-8906e692023

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Articles • Hoehnea 51 • 2024 • https://doi.org/10.1590/2236-8906e692023 copy

Macrophytes of the Capitão Poço river micro-basin, State of Pará, Eastern Amazon, Brazil: floristic composition and identification key for the species¹ 1 Part of the first Author’s Final Year Project Paper

Macrófitas da microbacia do rio Capitão Poço, Amazônia Oriental, Brasil: composição florística e chave de identificação para as espécies

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

We aimed to characterize the floristic composition, detect the life forms, and provide an identification key for the macrophyte species of the Capitão Poço river micro-basin in the State of Pará, located in the Eastern Amazon. The collected specimens were identified and deposited in the HCP herbarium. We found 23 species distributed in 19 genera and 14 families of macrophytes. The families with the highest species richness were Cyperaceae (six spp.), Poaceae (three spp.), Onagraceae and Plantaginaceae (two spp. each). We present here the first record of Dichanthelium aequivaginatum from the Brazilian Amazon and the Northern region of Brazil. We suggest that floristic-taxonomic studies of macrophytes in the hydrographic basins of the northeastern region of Pará should be intensified in order to better understand the regional flora of this group.

Keywords:
aquatic flora; Brazilian Amazon; checklist; new records; streams

Families/Species	Biological forms	Vouchers	Sampling sites
Families/Species	Biological forms	Vouchers	P1	P2*	P3	P4*	P5*	P6	P7	P8
Ferns
Salviniaceae
Salvinia auriculata Aubl. (Fig. 3 a)	FL	W.C.R. Soares 6		X					X
Thelypteridaceae
Christella dentata (Forssk.) Brownsey & Jermy (Fig. 3 b)	EM/A	L.S. Carvalho 35							X	X
Basal angiosperms
Cabombaceae
Cabomba aquatica Aubl. (Fig. 3 c)	FS	L.S. Carvalho 6	X	X	X	X	X	X	X	X
Nymphaeaceae
Nymphaea rudgeana G.Mey. (Fig. 3 d)	FF	W.C.R. Soares 17	X	X	X	X	X	X	X	X
Eudicots
Ochnaceae
Sauvagesia erecta L. (Fig. 3 e)	A	W.C.R. Soares 15					X
Ludwigia hyssopifolia (G.Don) Exell (Fig. 3 f)	A	W.C.R. Soares 3				X
Ludwigia leptocarpa (Nutt.) H.Hara (Fig. 3 g)	A	L.S. Carvalho 19	X
Plantaginaceae
Bacopa aquatica Aubl. (Fig. 3 h)	EM	L.S. Carvalho 26						X
Bacopa aubletiana Scatigna (Fig. 3 i)	EM/A	W.C.R. Soares 9	X		X			X
Monocots
Alismataceae
Limnocharis flava (L.) Buchenau (Fig. 3 j)	EM	W.C.R. Soares 5				X	X
Cyperaceae
Cyperus haspan L. (Fig. 3 k)	A	W.C.R. Soares 16		X	X				X
Cyperus luzulae (L.) Retz. (Fig. 3 l)	A	W.C.R. Soares 14						X
Cyperus odoratus L. (Fig. 4 a)	A	L.S. Carvalho 30				X			X
Eleocharis interstincta (Vahl) Roem. & Schult. (Fig. 4 b)	EM	L.S. Carvalho 2		X	X	X	X		X	X
Fuirena umbellata Rottb. (Fig. 4 c)	EM/A	L.S. Carvalho 31		X	X
Rhynchospora corymbosa (L.) Britton (Fig. 4 d)	EM/A	L.S. Carvalho 22							X	X
Eriocaulaceae
Tonina fluviatilis Aubl. (Fig. 4 e)	FS	L.S. Carvalho 33			X
Hydrocharitaceae
Apalanthe granatensis (Humb. & Bonpl.) Planch. (Fig. 4 f)	FS	L.S. Carvalho 18			X		X	X
Poaceae
Dichanthelium aequivaginatum (Swallen) Zuloaga (Fig. 4 g)	EM/A	W.C.R. Soares 13	X		X			X		X
Echinochloa colona (L.) Link (Fig. 4 h)	EM	L.S. Carvalho 20			X
Urochloa arrecta (Hack. ex T.Durand & Schinz) Morrone & Zuloaga (Fig. 4 i)	EM/A	W.C.R. Soares 19		X		X	X
Pontederiaceae
Heteranthera reniformis Ruiz & Pav. (Fig. 4 j)	EM	W.C.R. Soares 2				X	X
Xyridaceae
Xyris fallax Malme (Fig. 4 k-l)	EM/A	W.C.R. Soares 11								X
Species richness			3	4	8	5	5	5	4	4

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[1] 3 Corresponding author: lucimar.sicarvalho@gmail.com

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Macrophytes of the Capitão Poço river micro-basin, State of Pará, Eastern Amazon, Brazil: floristic composition and identification key for the species1 1 Part of the first Author’s Final Year Project Paper

Macrófitas da microbacia do rio Capitão Poço, Amazônia Oriental, Brasil: composição florística e chave de identificação para as espécies

ABSTRACT

Macrophytes of the Capitão Poço river micro-basin, State of Pará, Eastern Amazon, Brazil: floristic composition and identification key for the species¹ 1 Part of the first Author’s Final Year Project Paper