Buchnera carajasensis (Orobanchaceae), a new species from the canga vegetation of the Serra dos Carajás, Pará, Brazil

Buchnera nordestina (Orobanchaceae), an overlooked new species from Northeast Brazil, with an updated identification key for Buchnera of Brazil

“…B. tacianae, or based on several specimens from a very restricted area, i.e. B. carajasensis (Souza & Paula-Souza 2016;Scatigna et al 2017); therefore, the discovery of a new species with relatively broader distribution and that occurs inside urban areas such as São Luís is amazing. The fact that most records of B. nordestina were made very recently, with a collection gap of over 130 years between the two first records, indicates that the herbaceous plants have been historically overlooked in botanical surveys, whereas the period of ca.…”

“…Identification key to all species of Buchnera from Brazil (adapted from Paula-Souza 2016 andScatigna et al 2017)…”

“…The genus has its center of diversity in Africa, where more than 100 species have been recorded (Philcox 1965), being less represented in the New World, with only 16 species recognized by Philcox (1965). Souza & Giulietti (2009) accounted for nine species of Buchnera native in Brazil; more recently, the publication of two new species rose this number to eleven (Souza & Paula-Souza 2016;Scatigna et al 2017).…”

Flora of the cangas of Serra dos Carajás, Pará, Brazil: Orobanchaceae

“…In the New World, 14 species were recognized by Philcox (1965), nine of which occurring in Brazil (BFG 2015). The recent discovery of two additional species brought this number to 11 (Souza & PaulaSouza 2016;Scatigna et al 2017). Buchnera is characterized as hemiparasitic herbs or sub-shrubs; with hipocrateriform corollas that are slightly zigomorphic, blue, lilac or pink, with erect to slightly curved tubes; and monothecous anthers (Philcox 1965;Souza & Giulietti 2009).…”

“…Buchnera is characterized as hemiparasitic herbs or sub-shrubs; with hipocrateriform corollas that are slightly zigomorphic, blue, lilac or pink, with erect to slightly curved tubes; and monothecous anthers (Philcox 1965;Souza & Giulietti 2009). Brazilian species of Buchnera are usually found in open wet areas of the Cerrado domain and other formations associated with quartzite outcrops (campos rupestres) and ironstone outcrops (cangas) (Souza & Giulietti 2009;Scatigna et al 2017). Buchnera carajasensis Scatigna & N.Mota and B. longifolia Kunth were recorded in Serra dos Carajás, but only the former occurs in areas of canga.…”