Riccia is not a valid species
Did you mean one of the species from the following list?
Riccia albida - 29 collection objects
Riccia areolata - 2 collection objects
Riccia asprella - 9 collection objects
Riccia bifurca - 23 collection objects
Riccia billardierei - 3 collection objects
Riccia blackii - 1 collection objects
Riccia cartilaginosa - 8 collection objects
Riccia cavernosa - 18 collection objects
Riccia collata - 1 collection objects
Riccia crinita - 34 collection objects
Riccia crozalsii - 20 collection objects
Riccia crystallina - 23 collection objects
Riccia deserticola - 7 collection objects
Riccia duplex - 15 collection objects
Riccia fluitans - 1 collection objects
Riccia gangetica - 2 collection objects
Riccia junghuhniana - 1 collection objects
Riccia lamellosa - 33 collection objects