Taxonomy, palynology and distribution notes of seven species of Passiflora L. (Passifloraceae s. s.) newly recorded from Brazil
Author
Mezzonato-Pires, Ana Carolina
Universidade Federal do Rio de Janeiro, Museu Nacional, Departamento de Botanica, Quinta da Boa Vista, Sao Cristovao, CEP: 20940 - 040, Rio de Janeiro, RJ, Brasil
carolina.mezzonato@gmail.com
Author
Milward-de-Azevedo, Michaele Alvim
https://orcid.org/0000-0001-8076-5561
Universidade Federal Rural do Rio de Janeiro, Instituto Tres Rios, Departamento de Ciencias do Meio Ambiente, Avenida Prefeito Alberto da Silva Lavinas 1847, Centro, CEP: 25802 - 100, Tres Rios, RJ, Brasil
Author
Mendonca, Claudia Barbieri Ferreira
Universidade Federal do Rio de Janeiro, Museu Nacional, Departamento de Botanica, Quinta da Boa Vista, Sao Cristovao, CEP: 20940 - 040, Rio de Janeiro, RJ, Brasil
Author
Goncalves-Esteves, Vania
Universidade Federal do Rio de Janeiro, Museu Nacional, Departamento de Botanica, Quinta da Boa Vista, Sao Cristovao, CEP: 20940 - 040, Rio de Janeiro, RJ, Brasil
text
PhytoKeys
2018
2018-01-30
95
1
14
http://dx.doi.org/10.3897/phytokeys.95.22342
journal article
http://dx.doi.org/10.3897/phytokeys.95.22342
1314-2003-95-1
9F584374FF87C631FFB7FFCB182A5651
1170170
Passiflora
ovata Jos. Martin ex DC., Prodr. 3: 322. 1828. Astrophea ovata (Jos. Martin ex DC.) M. Roem. Familiarum Naturalium Regni Vegetabilis Synopses Monographicae 2: 151. 1846.
Figs 2G, H
, 3G, H
Descriptions
.
Lianas
; tendrils not seen.
Stipules
diminute, linear to linear-falcate.
Petioles
with two glands on the terminal end of the adaxial side.
Blades
9.5-19.3
x
4.3-8.7 cm, chartaceous, oblong to obovate, apex attenuate to abruptly attenuate, base obtuse to round, glabrous on both sides; margins slightly undulate, with 4-6 glands; 22-25 pairs of secondary veins.
Bracts
diminute, linear to linear-falcate, alternate.
Flowers
solitary, hypanthium widely campanulate; sepals oblong, light green; petals oblong, white; corona with 4-6 series of filaments, filaments of first series dolabriform, with apex narrowly linear, margins slightly undulate, yellow below the inflated portion of the filaments, orange-yellow in the inflated portion, filaments of second series linear, filaments of third and fourth series with hair-like, filaments of fifth and sixth series with hair-like, reflexed; operculum straight, tubular, exserted, filamentous with a fimbriate apex, papillose; trochlea absent on the androgynophore; ovary obovoid to oblong-ovoid, densely tomentose.
Fruits
5.5
x
3.5 cm, ellipsoid, glabrous.
Palynology.
Pollen grains large-sized (ca. 56.6
µm
), prolate spheroidal, 6-colporate, colpi short, narrow, three endoaperture lalongate (ca. 10.0
x
15.5
µm
) unique for each pair of ectoaperture, sexine reticulate, heterobrachate; muri (ca. 1.9
µm
) duplicolumellate, sinuous, continuous, without perforations, without high columellae, not apparent, tectum surface mostly slightly curved, lumina slightly ornamented with pila, large (ca. 13.4
µm
diam.) (Fig.
3G and H
).
Specimens examined.
BRAZIL
.
Acre
:
Acrelandia
, PAE
Porto Dias
(placing Bibi),
9°49'40"S
,
66°53'0"W
,
09-15 Nov 2006
[fl, fr],
F. Obermuller
et al. 102 (RB)
.
Amazonas
:
Sao
Gabriel da Cachoeira
:
Highway
BR-307,
SGC-Cucui
km 50, [
0°16'25"N
,
66°39'35"W
],
27 Oct 2008
[fl],
S. Sakagawa
et al. 668 (INPA); Highway BR-307,
SGC-Cucui
km 50, [
0°15'49"N
,
66°40'56"W
],
22 Apr 2008
,
R.L. Assis
et al. 93 (INPA)
.
Distribution and ecology.
It is known to occur in French Guiana, Venezuela and Brazil. It is recorded here for the states of Acre (municipality of
Acrelandia
) and Amazonas (municipality of
Sao
Gabriel da Cachoeira), growing in
Floresta
Ombrofila
Densa
formations, along roadsides, reaching up to 10 m high.
Taxonomic comments.
Passiflora ovata
belongs to
P. subg. Astrophea sect. Pseudoastrophea
(Harms) Killip. It can be easily differentiated due to its oblong to obovate leaf-blades, glands restricted to the abaxial side of the petiole near the blade, flowers with widely campanulate hypanthium, and dolabriform filaments on the first corona series. According to
Escobar (1990)
, the straight and tubular operculum of
P. ovata
, probably favours hummingbird pollination. The most morphologically similar species is
P. costata
, which can be easily distinguished from
P. ovata
by the presence of a trochlea in the androgynophore, operculum declinate at base with a straight upper part and corona with non-reflexed filaments in the inner series. According to
Mezzonato-Pires et al. (2017)
,
P. ovata
is included in the type III pollen group, due to its reticulate sexine and large lumina.