Didymopanax grandigemmus (Fiaschi) Fiaschi & G.M.Plunkett

First published in Brittonia 72: 19 (2020)
This species is accepted
The native range of this species is Brazil (Espírito Santo). It is a tree and grows primarily in the wet tropical biome.

Descriptions

Extinction risk predictions for the world's flowering plants to support their conservation (2024). Bachman, S.P., Brown, M.J.M., Leão, T.C.C., Lughadha, E.N., Walker, B.E. https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.19592

Conservation
Predicted extinction risk: threatened. Confidence: confident
[AERP]

Fiaschi, P., & Pirani, J. (2005). Four New Species of Schefflera (Araliaceae) from Espirito Santo State, Brazil. Kew Bulletin, 60(1), 77-85. Retrieved from http://www.jstor.org/stable/4110886

Type
Brazil, Espírito Santo, Santa Teresa, Nova Lombardia, Reserva Biológica Augusto Ruschi, 800 m, 25 Sept. 2001, Kollmann & Bausen 4723 (holotypus SPF; isotypus MBML).
Morphology General Habit
Trees 8 - 14 m high
Morphology Leaves
Leaves densely grouped together at the end of the branchlets or internodes up to 5 mm long, with 6 - 9 leaflets
Morphology Leaves Stipules
Stipules 5 - 6 mm long, whitish to greyish-sericeous abaxially, glabrous adaxially, apex entire or slightly bifid; petiole 9 - 30 cm long, cylindrical, longitudinally striate, glabrescent
Morphology Leaves Leaflets
Leaflets ascending, plane, chartaceous to somewhat leathery, with adaxial surface glabrescent and abaxial one persistently rusty, becoming brownish to greyish-sericeous on mature leaves Basal leaflets: petiolule 0.8 - 2.0 cm long, blade 4- 8 x 1.8 - 4.0 cm, similar to median one, clearly asymmetric; venation brochidodromous; main vein prominent on both surfaces, more intensely on abaxial one; secondary veins 8- 13, prominent only on abaxial surface; intersecondary veins usually present Median leaflet: petiolule 3 - 6.5 cm long, laterally compressed, plane to slightly canaliculate on adaxial surface; blade 7.5 - 12 x 3 - 6 cm, narrowly elliptic to obovate, symmetric to slightly asymmetric, apex usually obtuse to rounded (retuse), sometimes acute, mucronate, base cuneate to obtuse (rounded), margin entire, revolute Branchlets 13 - 17 mm diameter, whitish to rusty-sericeous
Morphology Reproductive morphology Inflorescences
Inflorescence pseudolateral, erect or with branches pendulous at fruiting, glabrescent; peduncle reduced or up to 1.5 cm long, rachis absent or up to 2 cm long; primary branches 3 - 5, of which 3 are terminal, 7.5 - 14 cm long; secondary branches 8 - 14, of which 5 - 9 are terminal, 1.5 - 4.5 cm long; bracts up to 3 mm long; tertiary branches lacking; partial inflorescence umbellate, 9 - 16-flowered; floral bracts up to 1 mm long
Morphology Reproductive morphology Flowers Pedicel
Pedicels 2 - 3 (7) mm long; calyx rusty-sericeous to brownish; petals 4.6 - 5.2 x 2.2 - 2.9 mm, ovate, apex acute, sericeous abaxially, yellow-greenish adaxially; filaments 1 mm long; anthers 3.1 - 3.2 x 1.3 - 1.6 mm, oblong; styles 2, free, reflexed in fruit
Morphology Reproductive morphology Fruits
Fruits drupaceous, laterally compressed when dry, 1.2 - 1.5 x 1.3 - 1.6 cm, glabrescent; pedicels 2 - 7 mm long; pyrenes 2, dimidiate, 8 - 9.2 x 5.5 - 6.3 mm.
Distribution
Vicinity of Santa Teresa, Espírito Santo state
Ecology
Endemic to the rainforests.
Note
Schefflera grandigemma resembles S. ruschiana, another new species described here, but can be distinguished from the latter by its erect inflorescence, without tertiary branching, by its leaves with no more than 9 leaflets, with the apex usually obtuse to rounded, but sometimes acute, its larger and short-pedicelled buds, and the much more fleshy fruits (remarkable even when the fruits are dry).
Phenology
It was collected with flowers from September to April and with fruits from January to April.
[KBu]

Sources

  • Angiosperm Extinction Risk Predictions v1

    • Angiosperm Threat Predictions
    • http://creativecommons.org/licenses/by/4.0
  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0
  • Kew Bulletin

    • Kew Bulletin
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0