A synopsis of the genus Drosera (Droseraceae) in Brazil
Author
Gonella, Paulo Minatel
0000-0001-8332-5326
Universidade Federal de São João del-Rei, Campus Sete Lagoas, Rodovia MG 424, km 47, Sete Lagoas, MG, 35701 - 970, Brazil & Laboratório de Sistemática Vegetal, Instituto de Biociências, Universidade de São Paulo, Rua do Matão 277, São Paulo, SP, 05508 - 900, Brazil & pmgonella @ gmail. com; https: // orcid. org / 0000 - 0001 - 8332 - 5326
pmgonella@gmail.com
Author
Sano, Paulo Takeo
0000-0002-1709-1215
Laboratório de Sistemática Vegetal, Instituto de Biociências, Universidade de São Paulo, Rua do Matão 277, São Paulo, SP, 05508 - 900, Brazil & ptsano @ usp. br; https: // orcid. org / 0000 - 0002 - 1709 - 1215
ptsano@usp.br
Author
Rivadavia, Fernando
0000-0002-9836-4472
185 SW 7 th St, Miami, Florida 33130, USA & fe _ riva @ uol. com. br; https: // orcid. org / 0000 - 0002 - 9836 - 4472
fe_riva@uol.com.br
Author
Fleischmann, Andreas
0000-0002-4917-4736
Universidade Federal de São João del-Rei, Campus Sete Lagoas, Rodovia MG 424, km 47, Sete Lagoas, MG, 35701 - 970, Brazil & Botanische Staatssammlung München (SNSB-BSM), Menzinger Strasse 67, D- 80638 Munich, Germany & Universidade Federal de São João del-Rei, Campus Sete Lagoas, Rodovia MG 424, km 47, Sete Lagoas, MG, 35701 - 970, Brazil & GeoBio-Center LMU, Ludwig-Maximilians-University, Munich, Germany & Universidade Federal de São João del-Rei, Campus Sete Lagoas, Rodovia MG 424, km 47, Sete Lagoas, MG, 35701 - 970, Brazil & fleischmann @ bio. lmu. de; https: // orcid. org / 0000 - 0002 - 4917 - 4736 * Author for correspondence & Universidade Federal de São João del-Rei, Campus Sete Lagoas, Rodovia MG 424, km 47, Sete Lagoas, MG, 35701 - 970, Brazil
fleischmann@bio.lmu.de
text
Phytotaxa
2022
2022-07-05
553
1
1
76
journal article
89514
10.11646/phytotaxa.553.1.1
c7e5ebab-96fe-422c-80e3-30997073344d
1179-3163
6796689
8.
Drosera chimaera
Gonella & Rivadavia
in
Gonella
et al.
(2014: 34)
. Figures 6c, 11d–f
Type:
—
BRAZIL
.
Minas Gerais
:
Cristália
, em afloramento de arenito ao lado de banco de areia na margem direita do
Rio Itacambiruçu
,
695 m
alt.,
07 September 2011
,
Gonella et al. 500
(
holotype
SPF-208500!; isotypes BHCB!, P-00847863!, RB-623119!)
.
Perennial
, rosetted, acaulescent.
Leaves
semi-erect, with circinate vernation, narrowly to broadly oblong-lanceolate, petioles much shorter than the lamina (less than 1/3 of leaf length), adaxial petiole surface glabrous, abaxial leaf surface sparsely eglandular-pilose; stipules rectangular in outline, apical half fimbriate.
Scape
erect at the base and densely eglandular-pilose (especially on basal third), becoming densely glandular-pilose towards apex, often bifurcating, bearing flowers with petals up to
6 mm
long, pink; gynoecium 3-carpelate, styles bifurcated at the base.
Seeds
ovoid, 0.4
×
0.2 mm
, testa reticulate (based on
Gonella
et al.
2014
).
Illustrations:
—
Gonella
et al.
(2014: 36
, fig. 16—habit and details).
Distribution:
—
Brazil
(Southeast: MG), endemic. Restricted to the northern portion of the Espinhaço Range in
Minas Gerais
, in the municipalities of Grão Mogol and Cristália (Fig. 6c).
Habitat:
—Moist clayish sandy soils or cracks in quartzite at river margins, sometimes shaded by riparian vegetation, around
700 m
a.s.l.
Phenology:—
Found with flowers in July, September and October.
Conservation status:
—Endangered (EN) B1a, b(iii) + B2a, b(iii). This designation is based on the estimated EOO of
2.4 km
2
and AOO of
8km
2
, the occurrence range completely out of any protected area, and the fragile habitat that is highly susceptible to disturbance. The species is known only from three to four small populations that are highly susceptible to habitat changes due to deforestation for charcoal and sand extraction for construction. The known populations of
D. chimaera
lie close to the limits of the Grão Mogol State Park, but the species has not been recorded from this protected area so far.
Notes:
—Sterile rosettes of
D. chimaera
are reminiscent of smaller-sized
D. latifolia
, but both species are readily distinguished in fertile specimens by scape indumentum which is densely eglandular-pilose at the basal half (Fig. 11e;
vs
. glabrous to glabrescent), and by smaller, ovoid seeds. Inflorescence indumentum, flower morphology and seed shape are very similar to those of
D. tomentosa
Saint-Hilaire (1826: 261)
var.
tomentosa
, but
D. chimaera
is easily distinguished by the longer narrowly to broadly oblong-lanceolate semi-erect leaves (Fig. 11d, e).
Specimens examined:
—
BRAZIL
.
Minas Gerais
:
Cristália
, margem direita do
Rio Itacambiruçu
(
type
locality),
July 2010
,
Peres Júnior
26
(
UB
)
,
12 August 2010
,
Gonella
359
(
SPF
)
.
Grão Mogol
,
Serra de Grão Mogol
,
August 1960
,
Mendes Magalhães
18091
(
UB
)
;
estrada para
Francisco Sá
,
15 October 1988
,
Harley
et al. 25067
(K,
SPF
)
;
Capim Puba
,
727 m
alt,
13 August 2010
,
Gonella
360
(
SPF
)
,
07 September 2011
,
Gonella
et al. 489
(
BHCB
, RB,
SPF
)
.