Archidendropsis I.C. Nielsen, Fl. Nouv.- Caledon . Depend . 12: 66. 1983.

Bruneau, Anne, de Queiroz, Luciano Paganucci, Ringelberg, Jens J., Borges, Leonardo M., Bortoluzzi, Roseli Lopes da Costa, Brown, Gillian K., Cardoso, Domingos B. O. S., Clark, Ruth P., Conceicao, Adilva de Souza, Cota, Matheus Martins Teixeira, Demeulenaere, Else, de Stefano, Rodrigo Duno, Ebinger, John E., Ferm, Julia, Fonseca-Cortes, Andres, Gagnon, Edeline, Grether, Rosaura, Guerra, Ethiene, Haston, Elspeth, Herendeen, Patrick S., Hernandez, Hector M., Hopkins, Helen C. F., Huamantupa-Chuquimaco, Isau, Hughes, Colin E., Ickert-Bond, Stefanie M., Iganci, Joao, Koenen, Erik J. M., Lewis, Gwilym P., de Lima, Haroldo Cavalcante, de Lima, Alexandre Gibau, Luckow, Melissa, Marazzi, Brigitte, Maslin, Bruce R., Morales, Matias, Morim, Marli Pires, Murphy, Daniel J., O'Donnell, Shawn A., Oliveira, Filipe Gomes, Oliveira, Ana Carla da Silva, Rando, Juliana Gastaldello, Ribeiro, Petala Gomes, Ribeiro, Carolina Lima, Santos, Felipe da Silva, Seigler, David S., da Silva, Guilherme Sousa, Simon, Marcelo F., Soares, Marcos Vinicius Batista & Terra, Vanessa, 2024, Advances in Legume Systematics 14. Classification of Caesalpinioideae. Part 2: Higher-level classification, PhytoKeys 240, pp. 1-552 : 1

Archidendropsis I.C. Nielsen, Fl. Nouv.- Caledon. Depend. 12: 66. 1983.

Figs 227 , 228 , 232

Albizia sect. Spiciflorae Benth., London J. Bot. 3: 85. 1844. Type: Albizia fulgens (Labill.) Benth. [≡ Acacia fulgens Labill. (≡ Archidendropsis fulgens (Labill.) I.C. Nielsen)]

Albizia sect. Spiciflorae Benth. ser. Platyspermae Benth., Trans. Linn. Soc., London 30: 558. 1875. Type not designated.

Type.

Archidendropsis fulgens (Labill.) I.C. Nielsen [≡ Acacia fulgens Labill.]

Description.

Unarmed trees or shrubs. Stipules small ovate or filiform and often caducous, or large auriculate, orbicular, or cordate and persistent, never thorny. Leaves bipinnate, pinnae 1-14 pairs; leaflets 1-25 pairs per pinna, opposite or alternate; extrafloral nectaries circular, elliptic or obtriangular, on leaf rachis and sometimes also on the pinnae. Inflorescences in axillary or terminal spikes, spiciform racemes, racemes or in one species [ A. fournieri (Vieill.) I.C. Nielsen] capitate, but when capitate the calyx and corolla are glabrous. Flowers uniform, bisexual, 4- or 5-merous, red, white, green, yellow or pink, usually subtended by very small tetrameric or pentameric bracts; calyx gamosepalous, cupular to campanulate; corolla gamopetalous, funnel shaped; stamens numerous, filaments united into a tube at the base; pollen in 16 or 32-celled polyads, tectum with non-isometric channels; ovaries mostly one, several in A. oblonga (Hemsl.) I.C. Nielsen. Fruits usually flat and dehiscent along both sutures, not partitioned inside and endocarp not separating from the exocarp. Seeds flattened or swollen, narrowly winged when flattened, thin-walled and lacking a pleurogram.

Chromosome number.

Unknown.

Included species and geographic distribution.

Eleven species from New Caledonia, New Britain, the Solomon Islands and on the island of New Guinea (Fig. 232 ).

Ecology.

Most species with a restricted area of distribution, found in rainforests, gallery forest, wooded ravines, or mesophyllous forest.

Etymology.

From the generic name Archidendron with the Latin suffix -opsis, referring to the similarity to that genus.

Human uses.

Unknown.

Notes.

Archidendropsis was published as "Gen. B" by Nielsen (1981b). The genus is now restricted to the former Archidendropsis subg. Archidendropsis after the erection of Heliodendron by Brown et al. (2022). Further sampling of species of Archidendropsis in phylogenetic studies would be beneficial, particularly to ascertain the relationships of the capitulate-flowered A. fournieri and the non-New Caledonian representatives of Archidendropsis .

Taxonomic references.

Cowan (1998); Nielsen (1983); Nielsen et al. (1983b).

Figures

Figure 227. Inflorescence and flower diversity of genera in the Archidendron clade A Archidendron vaillantii (F. Muell.) F. Muell. B Archidendropsis paivana (E. Fourn.) I. C. Nielsen C Falcataria falcata (L.) Greuter & R. Rankin D Heliodendron thozetianum (F. Muell.) Gill. K. Br. & Bayly E Serianthes sp. F Pararchidendron pruinosum (Benth.) I. C. Nielsen G Paraserianthes lophantha (Willd.) I. C. Nielsen H Wallaceodendron celebicum Koord. Photo credits A, F A Furhmann B B Henry C JB Friday D S Worboys E T Rodd G AndyBonsai H Plantaholic Sheila.

Figure 228. Fruit and seed diversity of genera in the Archidendron clade A fruit of Archidendron lucyi F. Muell. (Brown 169) B open pod of Archidendropsis streptocarpa (E. Fourn.) I. C. Nielsen showing winged seeds C opened pod of Falcataria falcata (L.) Greuter & R. Rankin D Heliodendron xanthoxylon (C. T. White & W. D. Francis) Gill. K. Br. & Bayly opened pod (Hyland 9229) E Heliodendron basalticum (F. Muell.) Gill. K. Br. & Bayly winged seeds (Canning & B. Rimes 6173) F-H Serianthes dilmyi Fosberg showing the indehiscent (to very tardily dehiscent) (rarely) woody pods with transverse seeds which are each isolated in a chamber I Pararchidendron pruinosum (Benth.) I. C. Nielsen fruit and seedling J Paraserianthes lophantha (Willd.) I. C. Nielsen immature pods (Brown 204 A) K Wallaceodendron celebicum Koord. pod. Photo credits A, I, J G Brown B B Henry C JB Friday D, E Queensland Herbarium F-H R CJ Lim K Plantaholic Sheila.

Figure 232. Distribution of Archidendropsis based on quality-controlled digitised herbarium records. See Suppl. material 1 for the source of occurrence data.