Hornschuchia cauliflora Maas & Setten
Creators: name: Vilela, Lucas
name: Lopes, Jenifer De Carvalho
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Magnoliopsida
Magnoliales
Annonaceae
Hornschuchia
Hornschuchia cauliflora

description: Hornschuchia cauliflora Maas & Setten
Fig. 3
Proceedings of the Koninklijke Nederlandse Akademie van Wetenschappen, Series C: Biological and Medical Sciences 91 (3): 259, figs 16–17 (Maas et al. 1988).
Type: BRAZIL – Bahia • (Aurelino Leal *) “ Km 5 a 15 da BR-101, ao sul de Ubaitaba ”; [14°20′26.8″ S, 39°19′07.2″ W]; 18 Nov. 1971; T.S. Santos 2193; holotype: CEPEC [CEPEC00008090]!; isotype: NY [NY00008359]!.
Material examined
BRAZIL – Bahia • “ Camamu, Fazenda Exílio, entrada no km 10.7 da BA 650 Camamú-Travessão, ca 2 km L da sede da fazenda ”; 14°0′7″ S, 39°10′7″ W; 21 Feb. 2000; J.G. Jardim 2716; ALCB [ALCB004361]!, CEPEC [CEPEC00088387]!, HUEFS [HUEFS062877]!, SPF! • “ Dom Macedo Costa, Fazenda Limeira ”; 12°54′35″ S, 39°9′10″ W; 18 Oct. 2015; G. Costa 1515; ALCB [ALCB030994]! • “ Itacaré, Entre Taboquinhas e Itacaré. BA-654. Interior de mata à beira da estrada ”; [14°16′55.2″ S, 38°59′47.3″ W]; 1 Jan. 1988; M. Sobral 5749; CEPEC [CEPEC00044273]!, ECT [ECT0003694]!, ICN [ICN00027827]!, NY [NY00395774]!, SPF! • “ Ubaitaba, Trecho da BR 101 Ubaitaba ao Porto Santo Antonio ao Sul ”; 22 Jun. 1972; T.S. dos Santos 2336; CEPEC [CEPEC00008836]!; NY [NY00395775]! • “ Uruçuca, Rodovia Uruçuca- Ubaitaba ”; [14°34′46.5″ S, 39°17′59.0″ W]; 20 Apr. 1970; T.S. dos Santos 752; CEPEC [CEPEC00005734]!, NY [NY00395776]!.
Description
Shrubs or trees, 3–8 m tall. Leaves subcoriaceous, petiole 3–9 mm long, lamina 14.9–32 × 3.5–15 cm, narrowly elliptic to elliptic, narrowly oblong to oblanceolate or lorate, both surfaces glabrous, base asymmetric, decurrent, acute to obtuse, apex acuminate to acute, attenuate to obtuse or rarely emarginate, primary vein impressed adaxially and raised abaxially, 13–22 pairs of secondary veins, angles between primary and secondary veins 50–60°. Inflorescence 2–22-flowered, trunciflorous, bracts absent. Flowers with pedicel 2–7 mm long, flower buds 3–7 × 1–2 mm, conical, densely covered in trichomes at the base and glabrescent towards the apex. Sepals completely connate, calyx cupuliform, apex truncate, 1–2 × 1–3 mm, glabrescent. Petals linear, white, 7–10 mm long, covered in trichomes, stamens (3–)6, 1.5–3.0 × 0.5 mm, carpels 3, 2–5 × 0.5 mm. Monocarps 1–3, fusiform, 1–6.3 × 0.3–0.6 cm, glabrous, green in vivo, stipe 2–5 mm long, calyx persistent. Seeds 4–6, ellipsoid, 13–19 × 4–7 mm, brownish, rugose, with aril.
Distribution and habitat
Hornschuchia cauliflora is endemic to Bahia, occurring in a small area from the municipalities of Uruçuca southward to Camamu, a distance of only 100 km. Hornschuchia cauliflora inhabits lowland tropical moist forest, but it is also found along the border with seasonal semideciduous forest (Gouvêa et al. 1976; Thomas & Barbosa 2008; Fig. 3).
Phenology
Flowering from October to January and fruiting from February to June.
Preliminary conservation status
Endangered, EN B1ab(i,ii,iii)+2ab(i,ii,iii) (Amorim et al. 2020a). There are only six preserved specimens of H. cauliflora. Since the last revision, 27 years ago (Johnson & Murray 1995), the species has been collected only twice, with a hiatus of 15 years between each collection, and has not been recollected in the last seven years.
Notes
The updated description includes more information about plant size and leaf morphology and dimensions (Johnson & Murray 1995). Hornschuchia cauliflora presents trunciflory, which is also found in some individuals of H. bryotrophe. However, H. bryotrophe is the only species in the genus with an evident commissural vein.
description: Published as part of Vilela, Lucas & Lopes, Jenifer De Carvalho, 2022, Hornschuchia (Annonaceae), an endemic and threatened genus from the Brazilian Atlantic Forest, pp. 75-108 in European Journal of Taxonomy 828 on pages 85-86, DOI: 10.5852/ejt.2022.828.1859, http://zenodo.org/record/6823766