Hornschuchia (Annonaceae), an endemic and threatened genus from the Brazilian Atlantic Forest
Vilela, Lucas
Lopes, Jenifer De Carvalho
European Journal of Taxonomy
2022
2022-07-11
828
75
108
Mello-Silva & D. M. Johnson
Mello-Silva & D. M. Johnson
[451,1137,1445,1472]
Magnoliopsida
Annonaceae
Hornschuchia
Plantae
Magnoliales
16
91
Tracheophyta
species
mediterranea
Figs 4B–C, 5
Phytotaxa483 (3): 286, figs 1–2 ( Mello-Silva et al.2021).
Type: BRAZIL– Bahia• “ Jussari. Fazenda São Roque, 2.8 kmem estrada vicinal à direita da estrada Jussari-Palmira, entrada a 13.8 kmalém da ponte sobre o rio Piabanha, na saída de Jussari (entrada à esquerda a 2 kmde Palmira no sentido Palmira – Jussari), mata semidecidual de encosta, antropizada”; 15°08′17.4″ S 39°34′16.8″ W; alt. 211 m; 28 Oct. 2008; R. Mello-Silva3138; holotype: SPF[ SPF00220462]!; isotypes: CEPEC!, K!, NY!, OWU!, RB!, W!. Material examined BRAZIL– Bahia• “ Antônio Cardoso, 20 kmde Feira de Santana, na BR-116, Fazenda Sossego”; 12°21′56″ S, 39°06′33″ W; 11 Aug. 1999; E. Melloet al. 2774; SPF! • “ Jussari, ca 2.5 kmN of Palmira on road connecting Palmira to the Itaju do Colonia-Itapé road, Fazenda São Roque( owner Luis Fernando Verde)”; 15°08.3′ S, 39°34.3′ W; alt. 300–450 m; 2 Feb 1999; W.W. Thomas11935; SPF! • ibid.; 15°08.476′ S, 39°34.749′ W; alt. 250–300 m; 14 Mar. 2001; W.W. Thomas12313; SPF! • “ Fazenda Serra do Teimoso, Reserva Serra do Teimoso”; 15°09′12″ S, 39°31′50″ W; 16 Mar. 2003; W.W. Thomas13393; SPF! • “ Mundo Novo, entrada para a cidade próximo a BA-052 (Estrada do Feijão)”; 11°52′35″ S, 40°27′9″ W; alt. 465 m; 11 Aug. 1999; E. Melloet al. 2784; SPF!.
Description Shrubs or trees, 1.5–8 mtall. Leaves chartaceous to coriaceous, petiole 2–6 mmlong, lamina 4.4– 15.5 × 2.3–5.8 cm, narrowly elliptic to elliptic, narrowly ovate or lanceolate to oblanceolate, adaxial surface glabrous and abaxial surface glabrous to glabrescent, base cuneate to acute, apex attenuate to acute, slightly acuminate or obtuse, primary vein impressed adaxially and raised abaxially, 7–12 pairs of secondary veins, angles between primary and secondary veins 40–60°. Inflorescence one-flowered, axillary, supra-axillary, terminal or leaf-opposed, bracts absent. Flowers with pedicel 4–6 mmlong, flower buds 3–6 × 1–3 mm, globose to ovoid to conical with acute apex, covered in trichomes. Sepals completely connate, calyx cupuliform, apex truncate to triangular, 3–6 × 4–7 mm, densely covered in trichomes. Petals linear, white, rarely yellowish, 6–9 mmlong, covered in trichomes, stamens 3–6, 2–3 × ca 1 mmlong, carpels 5–8, 2–3 mmlong. Monocarps 2–5, globose to ellipsoid, 8–13 × 5–9 mm, densely covered in trichomes, sessile, calyx caducous. Seeds 3–4, wide obovoid to ellipsoid, 7–7.2 × 4 mm, obovoid to ellipsoid, brownish, rugose, with aril.
Distribution and habitat Hornschuchia mediterraneaoccurs inland in Bahia. It inhabits seasonal semideciduous forest, seasonal deciduous forest and lowland tropical moist forest ( Gouvêa et al.1976; Thomas & Barbosa 2008), with one occurrence near the Caatinga domain, a xeric vegetation type, in the municipality of Mundo Novo ( Figs 5, 7A).
Phenology Flowering from February to April and fruiting from February to August.
Preliminary conservation status Endangered, EN B2ab(iii) ( Mello-Silva et al.2021).
Notes Hornschuchia mediterraneais similar to H. mellosilvaein its larger calyx and globose, rounded or conical floral bud ( Fig. 4B–C). However, H. mediterraneahas smaller petals ( 6–9 mmlong vs 9–24 mmlong) fewer stamens (3–6 vs 10), more carpels (5–8 vs 4) and globose to ellipsoid monocarps, 6–11 × 3–9 mm, with rounded apex and densely covered in trichomes (vs obloid with acute apex, 20–24 × 9–12 mm, glabrous).
3862607462
mata semidecidual de encosta, antropizada
2008-10-28
SPF, CEPEC, K, NY, OWU, RB, W
R. Mello-Silva
Brazil
211
-15.138166
Jussari
1
-39.57133
16
91
SPF00220462
1
Bahia
holotype
3862607427
1999-08-11
SPF
E. Mello
Brazil
Antonio Cardoso
-12.365556
Antonio Cardoso
21
-39.109165
Feira de Santana
16
91
1
Bahia
3862607418
1999-02-02
SPF
W. W. Thomas
Brazil
Jussari
375
-15.138333
Fazenda Sao Roque
128
-39.571667
Palmira
16
91
1
Bahia
3862607465
[191,1261,1962,1991]
2001-03-14
SPF
W. W. Thomas
Brazil
Jussari
275
-15.141267
Itaju do Colonia-Itape
1
-39.57915
Palmira
16
91
1
Bahia
3862607389
2003-03-16
SPF
W. W. Thomas
Brazil
17
92
-15.153333
Reserva Serra do Teimoso
21
-39.530556
Fazenda Serra do Teimoso
16
91
1
Bahia
3862607337
1999-08-11
SPF
E. Mello
Brazil
465
-11.876389
Mundo Novo
21
-40.4525
Mundo Novo
17
92
1
Bahia