Fridericia resinosa A. H. Gentry ex Kaehler

Kaehler, Miriam & Lohmann, Lúcia G., 2022, Taxonomic revisions in Fridericia (Bignonieae, Bignoniaceae) II: the “ Neomacfadya ” clade, Willdenowia 52 (2), pp. 247-271 : 263

8. Fridericia resinosa A. H. Gentry ex Kaehler in Phytotaxa 461: 132. 2020. – Holotype: Brazil, Bahia, Barra , c. 58 km W de Ibotirama, na BR-242, 12°12'S, 43°36'W, 11 Oct 1994, L. P. de Queiroz & N. S. Nascimento 4067 (HUEFS-018496 barcode HUEFS000024996 [image!]; isotypes: BAH-10335 n.v., FLOR barcode FLOR0041323 n.v., HUNEB-7635 n.v., NY barcode NY00412107!, TEPB accession code TEPB-17.852!, UB accession code UB-118325 !, VIES barcode VIES013149 [image!]). – Fig. 7, 8A–E.

Morphological description — Lianas or scandent shrubs, evergreen, up to 3 m high. Branches terete, striate and sparsely lenticellate, brown when dry, glabrous; without interpetiolar ridge, with interpetiolar glandular fields; prophylls of axillary buds triangular, apiculate, 1–1.2 mm long. Leaves (1 or)2-foliolate; petiole 0.5–0.8 cm long when 1-foliolate, 1–3.3 cm when 2-foliolate, glabrous (sparsely puberulous at canalicule, with simple trichomes); petiolules with equal lengths (0.5–) 1–1.8 cm, glabrous or puberulous; blade chartaceous or coriaceous, smooth, margin revolute, central leaflet ovate or elliptic when 1-foliolate, (2.5–)6–8 × (1.5–) 3.4–6 cm, base obtuse or truncate to subcordate, apex shortly acuminate, lateral leaflets ovate or elliptic, (5–)7.5–11 × (2.4–) 5–6.5 cm, base obtuse, rounded or subcordate, apex acuminate to caudate, adaxially vernicose, glabrous and lepidote throughout (sometimes glabrescent with trichomes only at veins), abaxially glabrous throughout (sometimes pubescent, with simple trichomes only at veins), venation pinnate, secondary veins raised, tertiary veins raised, without pocket and with trichome tuft domatia. Inflorescences axillary, thyrsoid with abortion of lateral buds resembling a raceme, with 2 or 3 orders, first-order peduncles 1.1–6 cm long, second-order 0.3–2.9 cm, third-order 0.3–0.6 cm, glabrous or pubescent, with simple trichomes; bracts linear, 2–3 mm long, caducous; bracteoles triangular, 0.8– 1.2 mm long, persistent; pedicels 0.2–0.5 cm long. Calyx tubular to obconic, not costate, truncate (sometimes irregularly split), 1.6–2.2 × 0.5–0.8(–1.2) cm, lepidote with glandular peltate trichomes, chartaceous, yellowish green, with patelliform glandular trichomes clustered close to rim and few scattered through surface. Corolla infundibular with abrupt narrowing close to calyx, strongly zygomorphic, furrowed, 3.8–5.7 cm long, 0.8–2 cm wide at tube mouth, externally pubescent, with simple and glandular capitate trichomes outside, without glands, lobes 0.6–1.1 × 0.6–1(–1.4) cm, margin rounded and undulate, pink or purple to vinaceous. Androecium with all stamens included; longer filaments 1.9–2.1 cm long, shorter filaments 1.3–1.5 cm; staminode 1.7–3.3 mm long; anthers 2–4 mm long, connectives protruding 0.75–0.8 mm. Gynoecium with ovary cylindric, c. 2.1 × 0.75–0.8 mm, furrowed, lepidote, style 2.9–3.2 cm long; stigma oval; nectar disk annular and smooth under ovary, 0.16–0.2 × 1.1–1.6 mm. Fruit not seen.

Phenology — Produces flowers in October and February.

Distribution and habitat — Fridericia resinosa is found in ecotone areas between the Cerrado and the Atlantic rainforest of Brazil and between the Cerrado and the Amazon rainforest. It is endemic to Brazil (Bahia, Maranhão, PiauÍ and Tocantins).

Conservation status — Fridericia resinosa is categorized as Least Concern (LC) based on its Extent of Occurrence (230,828 km 2). However, this species is known from only six localities suggesting it is Endangered (EN) based on its Area of Occupancy (20 km 2): EN B2ab(ii,iv).

Remarks — Fridericia resinosa resembles F. craterophora , although these two species can be distinguished by the glabrous petiole 1–3.3 cm long (vs villous and 0.3–0.8 cm long in F. craterophora ) and petiolule length (0.5–) 1–1.8 cm (vs 0.2–0.4 cm in F. craterophora ).