Taxonomic study of Myrtaceae in forest fragments in Amazonian Maranhão, Brazil
Author
Amorim, Gabriela Dos Santos
Programa de Pós-graduação em Biologia Vegetal, Universidade Federal de Pernambuco, Av. Prof. Moraes Rego, 1235 - Cidade Universitária, 50670 - 901, Recife - PE, Brazil.
Author
Barbosa, Maria Regina De Vasconcellos
Departamento de Sistemática e Ecologia, Universidade Federal da Paraíba, Cidade Universitária, Caixa Postal 5065, 58051 - 970, João Pessoa- PB, Brazil.
Author
Jr, Eduardo Bezerra De Almeida
Departamento de Biologia, Universidade Federal do Maranhão, Cidade Universitária Dom Delgado, Av. dos Portugueses, 1966 - Vila Bacanga, 65080 - 805, São Luís - MA.
Author
Thomas, William Wayt
0000-0002-4996-536X
Institute of Systematic Botany, New York Botanical Garden, 2900 Southern Boulevard, Bronx, 10458 - 5126, NY, United States. wthomas @ nybg. org; https: // orcid. org / 0000 - 0002 - 4996 - 536 X
wthomas@nybg.org
text
Phytotaxa
2022
2022-10-11
568
1
27
60
http://dx.doi.org/10.11646/phytotaxa.568.1.3
journal article
163382
10.11646/phytotaxa.568.1.3
87ddb879-1616-4e3b-8817-434b61fb0c60
1179-3163
7184245
19.
Myrcia bracteata
(Rich.)
De Candolle (1828: 245)
.
Basionym:—
Eugenia bracteata
Richard (1792: 110)
.
Type
:—
FRENCH GUIANA
.
Cayenne
,
Leblond
s.n.
(
P
[00297614] image)
(
Fig. 5B
.)
Shrubs
1–
3 m
. Twigs pubescent, the indumentum yellowish. Leaves with petioles
2–5 mm
long, pubescent, channeled; blades elliptic or lanceolate, 4–7.3 ×
1.8–2.6 cm
, glabrous or sparsely pubescent adaxially and pubescent abaxially, the indumentum yellowish, chartaceous, concolorous; glands conspicuous; base cuneate or rounded; apex acuminate; midvein adaxially impressed; lateral veins visible, not arched, 12 to 15 pairs; intra-marginal vein
1–2 mm
from the margin, margin slightly revolute. Inflorescence axillary, thyrsoid, flowers congested, the axis
2.5–2.7 cm
long, pubescent, the indumentum yellowish; the first branching ca.
1.5 cm
; bracts lanceolate, 0.8–1.2 ×
4–5 mm
, pubescent abaxially and glabrous adaxially, persistent in the fruit; pedicels
3–5 mm
long, pubescent; bracteoles lanceolate, 7–8 ×
3 mm
, pubescent abaxially and glabrous adaxially, persistent in the fruit; flower buds campanulate, 4 ×
4–7 mm
, not constricted above ovary; calyx-lobes free, five, lanceolate, 2–4 ×
1.5–2 mm
, pubescent abaxially and glabrous adaxially, not reflexed, persistent in the fruit; ovary 2-locular. Immature fruit ellipsoid, 0.6–0.8 ×
0.8–1 cm
, densely pubescent, surface smooth.
Note:—
Myrcia bracteata
may be recognized by its elliptic or lanceolate leaves, which are glabrous or sparsely pubescent adaxially and pubescent abaxially, the thyrsoid inflorescence, with yellowish indumentum, and long bracteoles (7–8 ×
3 mm
) with long yellowish indumentum, which are persistent, and the densely pubescent, ellipsoid fruit.
Distribution and habitat:—
Known from
Bolivia
,
Colombia
,
Ecuador
,
French Guiana
,
Guyana
,
Peru
,
Suriname
,
Venezuela
and central, northeastern and northwestern
Brazil
(
Acre
, Amazonas,
Maranhão
,
Mato Grosso
, Pará and
Rondônia
states) (POWO 2020,
Flora do
Brasil
2020
). In Amazonian
Maranhão
,
M
.
bracteata
was found growing in “terra firme” forests.
Phenology:—
Flowering in February.
Specimens examined:—
BRAZIL
.
Maranhão
:
Cândido Mendes
,
Fazenda
7 irmãos,
2°26’31” S
,
46°18’07” W
,
16 February 2020
(fl.),
G.S. Amorim
618
(
JPB
!)
.
Additional specimens examined:—
BRAZIL
.
Amazonas
:
Manaus
,
Reserva Florestal Ducke
,
2°52’59” S
,
59°58’00” W
,
24 January 1996
(fr.),
M.A.D. Souza
,
J.R. Pirani
,
M.A. Costa
&
C.F. Silva
208
(SP, image).
Pará: Santarém Novo, Bacuriteua, capoeira sul
de Bacuriteua
,
0°57’54” S
,
47°23’37” W
, 2010 (fl.),
M.P.M. Menezes
567
(HBRA, image).
Rondônia
: Porto Velho, Estrada de acesso ao alojamento provisório,
9°18’19” S
,
64°36’24” W
,
07 January 2009
(fr.),
G. Pereira-Silva
14019
(RON, image)
.