In a survey of the pteridophytes of Botswana, the family Isoetaceae wa
s encountered and is a new record for Botswana. The family is represen
ted by a single species, Isoetes schweinfurthii. Also recorded for fir
st time in Botswana were three other species: Ophioglossum lancifolium
, Actinopteris dimorpha, and Marsilea minuta.