Chamaecrista exsudans (Benth.) H.S. Irwin & Barneby, Mem.

Oliveira, Jaqueline Aparecida De, Mendes, Thainara Policarpo, Souza, Alessandro Oliveira De & Silva, Marcos José Da, 2021, New taxonomic circumscription to Chamaecrista ser. Setosae (H. S. Irwin & Barneby) H. S. Irwin & Barneby (Leguminosae, Caesalpinioideae), Phytotaxa 490 (2), pp. 118-158 : 152-156

publication ID	https://doi.org/ 10.11646/phytotaxa.490.2.1
persistent identifier	https://treatment.plazi.org/id/DC5D8782-FFE5-5074-FF4E-6425FBFCE9F8
treatment provided by	Marcus
scientific name	Chamaecrista exsudans (Benth.) H.S. Irwin & Barneby, Mem.
status

Treatment

Chamaecrista exsudans (Benth.) H.S. Irwin & Barneby, Mem. View in CoL New York Bot. Gard. 35: 650. 1982. Cassia exsudans

Benth., J. Bot. (Hooker) 2(4): 80. 1840. Type:— BRAZIL: Minas Gerais: Ouro Preto, Cachoeira (“Caxoeira”) do

Campo, 1839, (fl), Claussen 25 (lectotype: K-00055549, designated by Bentham in Martius (1870), isolectotype: P-

00836007).

= Chamaecrista xanthadena (Mart. ex Benth.) H.S. Irwin & Barneby, Mem. View in CoL New York Bot. Gard. 35: 650. 1982. Cassia exsudans var. xanthadena Mart. ex Benth. View in CoL in Mart., Fl. Bras. 15: 152. 1870. Cassia xanthadena (Mart. ex Benth.) H.S. Irwin & Barneby, Mem. View in CoL New York Bot. Gard. 30: 58. 1978. Type:— BRAZIL: Minas Gerais: “Inter distr. Adamant. et Sa. de S. Antonio, in vepretis siccis deserti”, August 1818, (fl), Martius 1508 (holotype: M-0217529, M-0217530).

= Chamaecrista adamantina (H.S. Irwin & Barneby) H.S. Irwin & Barneby, Mem. View in CoL New York Bot. Gard. 35: 650. 1982. Cassia adamantina H.S. Irwin & Barneby, Mem. View in CoL New York Bot. Gard. 30: 57. 1978. Type:— BRAZIL: Minas Gerais: Diamantina , June 1934, (fl, fr), Brade 13677 (holotype: RB-00539426, RB-00545310, isotype: NY-00003703).

= Chamaecrista ixodes (H.S. Irwin & Barneby) H.S. Irwin & Barneby, Mem. View in CoL New York Bot. Gard. 35: 650. 1982. Cassia ixodes H.S. Irwin & Barneby, Mem. View in CoL New York Bot. Gard. 30: 59. 1978. Type:— BRAZIL: Minas Gerais: Itamarandiba, Chapada de Itamarandiba , June 1960, (fl, fr), Mendes-Magalhães 18053 (holotype: NY-00003821).

= Chamaecrista xanthadena (Mart. ex Benth.) Govaerts, World Checkl. Seed Pl. View in CoL 3: 14. 1999. Nom. illeg.

= Chamaecrista amphibola (H. S. Irwin & Barneby) Irwin & Barneby (1982: 651) View in CoL . ≡ Cassia amphibola Irwin & Barneby (1978: 72) View in CoL , Type:— BRAZIL. São Paulo: in campis, Vila Franca [ca. 47°W, 2 r s], June 1834, (fl.), Riedel s.n. [holotype: Sheet 1 (LE00002283!), Sheet 2 (LE00002284!), isotype: NY00003710!]. Syn. nov.

Chamaecrista amphibola View in CoL , included formerly in Ch. sect. Absus subsect. Absus ser. Setosae , is known only from its typus collection. It was described by Irwin & Barneby (1978) who cited that its could be an intermediate specimen (hybrid) between some taxa belonging to the series Setosae and Ursinae . After its description, Ch. amphibola View in CoL was never collected again and analyzing the morphology of its typus collection, we concluded that it is more similar to Ch. exsudans View in CoL from the series Ursinae than other species of Setosae, mainly for having 3 or more pairs of leaflets and abundant stellate trichomes in vegetative and reproductive parts, which led us to consider Ch. amphibola View in CoL as a synonym for Ch. exsudans View in CoL . Considering that both species were described in the same work, and that Ch. exsudans View in CoL is a more collected and known taxon than C. amphibola View in CoL , we opted for the binomial as valid.