Hererolandia Gagnon & G.P. Lewis, PhytoKeys 71: 29. 2016.

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

Hererolandia Gagnon & G.P. Lewis, PhytoKeys 71: 29. 2016.

Fig. 36 , 38 , 50

Type.

Hererolandia pearsonii (L. Bolus) Gagnon & G.P. Lewis [≡ Caesalpinia pearsonii L. Bolus]

Description.

Multi-stemmed shrubs armed with curved, deflexed prickles. Stipules not seen. Leaves pinnate, borne in fascicles on short woody brachyblasts that are usually subtended by a pair of tiny (sometimes obscure) prickles; leaflets (4) 5-7 (9) pairs, opposite, eglandular. Inflorescence a short raceme. Flowers zygomorphic, bisexual; hypanthium short, persistent as a ring around the stipe of the fruit; sepals 5, free, the lower sepal cucullate and covering the other 4 sepals in bud, all sepals caducous; petals 5, yellow, free; stamens 10, free, pubescent on the lower half; ovary pubescent. Fruit a thinly woody, laterally compressed, almost circular to strongly sickle-shaped legume, dehiscing along the sutures, finely pubescent and covered in robust trichomes, usually 1-seeded. Seeds laterally compressed.

Chromosome number.

Unknown.

Included species and geographic distribution.

Monospecific ( H. pearsonii ), endemic to Namibia, on the Great Escarpment (Fig. 50 ).

Ecology.

Semi-desert and desert areas, on stony, sandy soils.

Etymology.

The type locality of H. pearsonii is in the semiarid Hereroland, a region of eastern Namibia inhabited by the Herero people, who are nomadic cattle herders.

Human uses.

Unknown.

Notes.

The genus was described by Gagnon et al. (2016), based on its isolated and unresolved position in the Caesalpinia group phylogeny, and its distinctive sickle-shaped to circular, 1-seeded legume covered in robust trichomes. In Ringelberg et al. (2022) the genus is resolved as sister to a clade comprising Haematoxylum and Lophocarpinia .

Taxonomic references.

Bolus (1920); Curtis and Mannheimer (2005); Gagnon et al. (2016); Nkowki and Swelankomo (2003).

Figures

Figure 36. Fruits of Caesalpinieae A Hererolandia pearsonii (L. Bolus) Gagnon & G. P. Lewis, Namibia, Sesriem Canyon B Haematoxylum brasiletto H. Karst., Mexico (Lewis 2057) C Lophocarpinia aculeatifolia (Burkart) Burkart, Paraguay, (Fortunato 8650) D Hoffmannseggia arequipensis Ulibarri, Peru, Arequipa, (Hughes et al. 2342) E Balsamocarpon brevifolium Clos, Chile (Baxter et al. DCI 1859) F Zuccagnia punctata Cav., Argentina, Mendoza G Cordeauxia edulis Hemsl., Somalia H Erythrostemon coccineus (G. P. Lewis & J. L. Contr.) Gagnon & G. P. Lewis, Mexico, Oaxaca (Lewis et al. 1802) I Paubrasilia echinata (Lam.) Gagnon, H. C. Lima & G. P. Lewis, Brazil J Libidibia paraguariensis (Parodi) G. P. Lewis, Bolivia, Santa Cruz (Hughes 2475) K Coulteria mollis Kunth, Guatemala (Lewis et al. 1714) L Cenostigma pluviosum var. cabralianum (G. P. Lewis) Gagnon & G. P. Lewis, Brazil (Lewis et al. 2019) M Pomaria jamesii (Torr. & A. Gray) Walp., USA. Photo credits A AA Dreyer B, I, K, L GP Lewis C RH Fortunato D, H, J CE Hughes E P Baxter F Italo Specogna, Flora mendocina (http: // www. floramendocina. com. ar / clase _ 3 / zuccagnia _ punctata _ p 9558. html) G M Thulin M P Alexander, SEINet Arizona Chapter (https: // swbiodiversity. org / seinet / imagelib / imgdetails. php? imgid = 253949).

Figure 38. Vegetative traits of the Caesalpinieae A Hoffmannseggia minor (Phil.) Ulibarri, Bolivia B Hererolandia pearsonii (L. Bolus) Gagnon & G. P. Lewis, Namibia, Sesriem Canyon C Moullava spicata (Dalzell ex Wight) Nicolson, India, Maharastra D Cordeauxia edulis Hemsl., undersurface of leaflets showing glands, Somalia E Pomaria austrotexana B. B. Simpson, USA, Texas F Small tree of Erythrostemon nicaraguensis (G. P. Lewis) Gagnon & G. P. Lewis, Nicaragua, Esteli (Hawkins et al. 4) G Leopard bark of Libidibia paraguariensis (D. Parodi) G. P. Lewis, Bolivia, Santa Cruz (Hughes 2475) H Lenticelled bark of Erythrostemon nicaraguensis (G. P. Lewis) Gagnon & G. P. Lewis, Nicaragua, Esteli (Hawkins et al. 4) I Young flush of leaves of Cenostigma pluviosum var. intermedium (G. P. Lewis) Gagnon & G. P. Lewis, Brazil, Bahia (Lima et al. 7901) J Fluted trunk of Haematoxylum brasiletto H. Karst., Mexico, Oaxaca, (Hughes 1947) K Prickles on woody protuberances on a young trunk of Paubrasilia echinata (Lam.) Gagnon, H. C. Lima & G. P. Lewis, Brazil, Bahia (Lima et al. 7909) L Recurved spines of Biancaea decapetala (Roth) O. Deg., Peru, Ancash, (Hughes et al. 3055). Photo credits A GP Lewis B AA Dreyer C Shivaprakash, iNaturalist (https: // inaturalist. ca / observations / 81864757) D M Thulin E WR Carr F-H, J CE Hughes I, K, L E Gagnon.

Figure 50. Distribution of Hererolandia based on quality-controlled digitised herbarium records. See Suppl. material 1 for the source of occurrence data.