Hornschuchia obliqua Maas & Setten

Vilela, Lucas & Lopes, Jenifer De Carvalho, 2022, Hornschuchia (Annonaceae), an endemic and threatened genus from the Brazilian Atlantic Forest, European Journal of Taxonomy 828, pp. 75-108 : 96-97

publication ID

https://doi.org/10.5852/ejt.2022.828.1859

DOI

https://doi.org/10.5281/zenodo.6823789

persistent identifier

https://treatment.plazi.org/id/03C887E4-0117-FFD4-FDE0-FB73FA8C79EE

treatment provided by

Felipe

scientific name

Hornschuchia obliqua Maas & Setten
status

 

Hornschuchia obliqua Maas & Setten

Figs 4D View Fig , 5 View Fig

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 View Materials ]!; isotypes: CEPEC [ CEPEC00050811 View Materials ]!, NY [ NY00008356 ]!, U [ U0000334 ] GoogleMaps !.

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 View Materials ] GoogleMaps ! • “ 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 View Materials ]!, HUEFS [ HUEFS013892 View Materials ]!, MBM [ MBM158839 View Materials ]!, NY [ NY00395805 ]!, US [ US01346587 ] GoogleMaps ! • ibid.; 14°25′24″ S, 39°3′38″ W; 15 Nov. 1995; W.W. Thomas et al. 11019; ALCB [ ALCB004564 View Materials ]!, CEPEC [ CEPEC00068119 View Materials ]!, MBM [ MBM194749 View Materials ] GoogleMaps ! • ibid.; 14°25′ S, 39°01′ W; 7 Sep. 1991; A.M. de Carvalho et al. 3649; CEPEC [ CEPEC00052143 View Materials ]!, HUEFS [ HUEFS013893 View Materials ]!, MBM [ MBM158840 View Materials ]!, NY [ NY00395807 ] GoogleMaps ! • ibid.; 1–12 Jul. 1991; W.W. Thomas 8041; NY [ NY00395804 ] GoogleMaps ! • ibid.; 1–12 Jul. 1991; A.M. de Carvalho 3350; ALCB [ ALCB004359 View Materials ]!, CEPEC [ CEPEC00052214 View Materials ]!, NY [ NY00395806 ]!, RB [ RB01351907 ]!, US [ US01346588 ] GoogleMaps ! • ibid.; 6 Oct. 1992; A.M. Amorim 794; CEPEC [ CEPEC00056662 View Materials , NY [ 00395802 ]!, NY [ NY00395803 ]!, RB [ RB00042097 ]!, US [ US01346586 ] GoogleMaps ! • ibid.; 1–12 Jul. 1991; W.W. Thomas 6933; CEPEC [ CEPEC0005328 View Materials ] GoogleMaps ! • ibid., “ 7 km na estrada Serra Grande/Itacaré, local do Inventário Florestal ”; 10 Oct. 1995; A.M. de Carvalho et al. 6132; CEPEC [ CEPEC00066687 View Materials ]!, MBM [ MBM187066 View Materials ]!, NY [ NY00395801 ] GoogleMaps ! • ibid., “ rodovia BA-001 Ilhéus/ Itacaré, ca 4.5 km do distrito de Serra Grande ”; 5 Jul. 2001; J.G. Jardim 3721; NY [ NY00684332 ] GoogleMaps !.

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 View Fig ).

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 View Fig ) 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 View Fig ). The description of H. myrtillus has been updated ( Johnson & Murray 1995) with information regard the plant size and fruit dimensions.

C

University of Copenhagen

CEPEC

CEPEC, CEPLAC

NY

William and Lynda Steere Herbarium of the New York Botanical Garden

U

Nationaal Herbarium Nederland

HUEFS

Universidade Estadual de Feira de Santana

MBM

San Jose State University, Museum of Birds and Mammals

ALCB

Universidade Federal da Bahia, Campus Universitário de Ondina

RB

Jardim Botânico do Rio de Janeiro