Pediomelum pentaphyllum (L.) Rydb.

Jarvis, Charlie, 2007, Chapter 7: Linnaean Plant Names and their Types (part P), Order out of Chaos. Linnaean Plant Types and their Types, London: Linnaean Society of London in association with the Natural History Museum, pp. 718-782 : 777

Psoralea pentaphylla Linnaeus , Species Plantarum 2: 764. 1753.

"Habitat in Mexico vel Malabaria." RCN: 5633.

Lectotype (Grimes in Mem. New York Bot. Gard. 61: 82. 1990): [icon] " Psoralea pentaphylla , radice crassa " in Jussieu in Mém. Acad. Roy. Sci. Paris 1744: 381, t. 17. 1744.

Current name: Pediomelum pentaphyllum (L.) Rydb. ( Fabaceae : Faboideae ).

Note: Ockenden (in S. W. Naturalist 10: 122. 1965) argued that the traditional usage (i.e. sensu Rydberg) of the Linnaean name did not match the Jussieu plate, which he could not identify with certainty, and so published the new name Psoralea palmeri Ockenden for P. pentaphylla sensu Rydberg non L. Later, Grimes (in Mem. New York Bot. Gard. 61: 82-83. 1990) stated "Typus, in default of a specimen, the protologue. The illustration in the protologue [i.e. Jussieu’s description and illustration] is ambiguous, resembling either this taxon, or Pediomelum hypogaeum var. subulatum . In combination with the description, however, the identity is decisive". This is accepted as effective lectotypification on the Jussieu illustration. Grimes erroneously used the name Pediomelum pentaphyllum (L.) Grimes for the taxon agreeing with the type of Psoralea pentaphylla L. , but not the description of Pediomelum pentaphyllum (L.) Rydberg. This error was later pointed out by Kartesz & Gandhi (in Phytologia 72: 86-87. 1992).