Hornschuchia (Annonaceae), an endemic and threatened genus from the Brazilian Atlantic Forest
Author
Vilela, Lucas
Universidade de São Paulo, Instituto de Biociências, Departamento de Botânica, Rua do Matão, 277, ed. Sobre-as-Ondas, 05508 - 090 São Paulo, SP, Brazil. & Universidade Anhembi-Morumbi, Escola de Ciências da Saúde, Rua Dr. Almeida Lima, 1134, 03101 - 001, Mooca, São Paulo, SP, Brazil.
vilela.lucas@hotmail.com
Author
Lopes, Jenifer De Carvalho
Universidade de São Paulo, Instituto de Biociências, Departamento de Botânica, Rua do Matão, 277, ed. Sobre-as-Ondas, 05508 - 090 São Paulo, SP, Brazil.
jenifer.clopes@gmail.com
text
European Journal of Taxonomy
2022
2022-07-11
828
75
108
http://dx.doi.org/10.5852/ejt.2022.828.1859
journal article
10.5852/ejt.2022.828.1859
c5427427-07fc-4449-ba86-25f19cd47482
2118-9773
6823766
Hornschuchia obliqua
Maas & Setten
Figs 4D
,
5
Proceedings of the Koninklijke Nederlandse Akademie van Wetenschappen, Series C:
Biological
and
Medical Sciences
91 (3): 260, figs 18–19 (
Maas
et al.
1988
).
Type
:
BRAZIL
–
Bahia
• “
Cairu
,
Estrada Cairu-Ituberá
,
8 km
S de Cairu
”; [
13°34′22.4″ S
,
39°03′22.6″ W
];
26 Jul. 1981
;
A.M. Carvalho
798
;
holotype
:
CEPEC
[
CEPEC00024357
]!; isotypes:
CEPEC
[
CEPEC00050811
]!,
NY
[
NY00008356
]!,
U
[
U0000334
]
!.
Material examined
BRAZIL
–
Bahia
•“
Ilhéus
,
Distrito de Castelo Novo
,
fazenda Almada
,
coletas no km 4na estrada para estação experimental do Almada e o povoado de Ribeira das Pedras, entrada no km 20 da rodovia Ilhéus/Uruçuca
”; [
14°39′18.7″ S
,
39°11′16.4″ W
]; alt.
110 m
;
8 Feb. 1996
;
L.A.M. Silva
3355
;
CEPEC
[
CEPEC00070901
]
! •
“
Uruçuca
,
Distrito de Serra Grande
,
7.3 km
na estrada Serra Grande/Itacaré
,
Fazenda Lagoa do Conjunto Fazenda Santa Cruz
”;
14°25′23″ S
,
39°3′42″ W
;
11–21 Sep. 1991
;
A.M. de Carvalho
et al. 3602
;
CEPEC
[
CEPEC00052187
]!,
HUEFS
[
HUEFS013892
]!,
MBM
[
MBM158839
]!,
NY
[
NY00395805
]!,
US
[
US01346587
]
! •
ibid.;
14°25′24″ S
,
39°3′38″ W
;
15 Nov. 1995
;
W.W. Thomas
et al. 11019
;
ALCB
[
ALCB004564
]!,
CEPEC
[
CEPEC00068119
]!,
MBM
[
MBM194749
]
! •
ibid.;
14°25′ S
,
39°01′ W
;
7 Sep. 1991
;
A.M. de Carvalho
et al. 3649
;
CEPEC
[
CEPEC00052143
]!,
HUEFS
[
HUEFS013893
]!,
MBM
[
MBM158840
]!,
NY
[
NY00395807
]
! •
ibid.;
1–12 Jul. 1991
;
W.W. Thomas
8041
;
NY
[
NY00395804
]
! •
ibid.;
1–12 Jul. 1991
;
A.M. de Carvalho
3350
;
ALCB
[
ALCB004359
]!,
CEPEC
[
CEPEC00052214
]!,
NY
[
NY00395806
]!,
RB
[
RB01351907
]!,
US
[
US01346588
]
! •
ibid.;
6 Oct. 1992
;
A.M. Amorim
794
;
CEPEC
[
CEPEC00056662
,
NY
[
00395802
]!,
NY
[
NY00395803
]!,
RB
[
RB00042097
]!,
US
[
US01346586
]
! •
ibid.;
1–12 Jul. 1991
;
W.W. Thomas
6933
;
CEPEC
[
CEPEC0005328
]
! •
ibid., “
7 km
na estrada Serra Grande/Itacaré, local do Inventário Florestal
”;
10 Oct. 1995
;
A.M. de Carvalho
et al. 6132
;
CEPEC
[
CEPEC00066687
]!,
MBM
[
MBM187066
]!,
NY
[
NY00395801
]
! •
ibid., “
rodovia BA-001 Ilhéus/ Itacaré, ca
4.5 km
do distrito de Serra Grande
”;
5 Jul. 2001
;
J.G. Jardim
3721
;
NY
[
NY00684332
]
!.
Description
Shrubs or trees,
1.5–8 m
tall. Leaves chartaceous, petiole
1–3 mm
long, lamina 12–31.5 ×
3.6–10.3 cm
, oblanceolate to narrowly oblong or narrowly elliptic, both surfaces glabrous, base asymmetric or cuneate, apex acuminate, acute, attenuate, primary vein impressed adaxially and raised abaxially, 9–18 pairs of secondary veins, angles between primary and secondary veins 30–45°. Inflorescence 3–8-flowered, in shortened, highly ramified branches, terminal or supra-axillary, bracts rarely persistent, 1.0–1.3 ×
0.4–0.5 cm
. Flowers with pedicel
3–30 mm
long, flower buds 3–6 ×
1–2 mm
, cylindrical with obtuse apex, covered in trichomes. Sepals completely connate, calyx cupuliform, apex truncate, 2–4 ×
1–4 mm
, glabrescent. Petals linear, white,
7–7.5 mm
long, glabrous, stamens 6, 2.5–3 ×
0.5 mm
, carpels 3, 2.4–3 ×
0.5 mm
. Monocarps 1–2, fusiform, 15–45 ×
5–8 mm
, densely covered in trichomes, immature monocarps whitish in vivo, sessile. Seeds 1–2.
Distribution and habitat
Hornschuchia obliqua
is endemic to
Bahia
, where it occurs in lowland tropical moist forest (
Gouvêa
et al.
1976
;
Thomas & Barbosa 2008
;
Fig. 5
).
Phenology
Flowering from February to October, fruiting from July to November.
Conservation status
Endangered, EN B1ab(i,ii,iii)+2ab(i,ii,iii) (
Amorim
et al.
2020b
).
Hornschuchia obliqua
is only known from three localities. It has not been collected in 19 years.
Notes
Hornschuchia obliqua
and
H. santosii
have 3–12-flowered inflorescences, which are axillary, terminal (
Fig. 4D
) or leaf-opposed. However,
H. obliqua
differs from
H. santosii
by its cylindrical floral bud (vs conical), fusiform monocarp,
1.3–6 mm
wide, densely covered in trichomes and whitish in vivo (vs globose,
16–19 mm
wide, glabrous, green in vivo;
Fig. 4E
). The description of
H. myrtillus
has been updated (
Johnson & Murray 1995
) with information regard the plant size and fruit dimensions.