Danaea (subg. Danaea) nigrescens Jenman, Gard. Chron.

Tuomisto, Hanna, Kessler, Michael & Smith, Alan R., 2018, Prodromus of a fern flora for Bolivia. VIII. Marattiaceae, Phytotaxa 344 (1), pp. 64-68 : 66-67

Danaea (subg. Danaea) nigrescens Jenman, Gard. Chron. , ser. 3, 24: 413. 1898.

Range: —Amazonia from Colombia to French Guiana and Brazil, and south to Peru and Bolivia (BE, CO, LP, PA, SC).

Ecology: —Common; terrestrial in humid forests, usually on fertile clayey soil, often near streams; mostly 200– 600 m, rarely to 1300 m. This is the common large Danaea in Bolivian lowlands.

Notes: —Young leaves often have a metallic-blue sheen. They become pinnate at a very early stage (usually when less than 15 cm long), unlike D. cartilaginea , whose smallest pinnate leaves are at least 20 cm long and simple leaves can exceed 40 cm. Bolivian specimens have previously been referred to Danaea nodosa Sm. ( Smith et al. 1999,

Tuomisto & Moran 2001), described from the Greater Antilles, but the Amazonian and Guianan specimens belong to a different clade than specimens from the Caribbean (Christenhusz et al. 2008). Here we use the name D. nigrescens , which is the oldest name with an Amazonian or Guianan type.