Pilularia

Linnaeus

Sp. Pl. 2: 1100. 1753; Gen. Pl. ed. 5, 486, 1754.

Common names: Pillwort
Etymology: Latin pilula, a little ball, in reference to the spheric sporocarps
Treatment appears in FNA Volume 2.

Plants aquatic, commonly entirely under water and infrequently persisting on bare mud. Roots arising at nodes. Leaves filiform, terete, lacking expanded blades. Sporocarps subterranean, borne on unbranched stalks arising at bases of petioles, attached laterally to stalk apex (attached portion called raphe), lacking teeth; sporocarps densely to sparsely hairy, less so with age, dehiscing into 4 valves.

Distribution

North America, South America, Europe, Pacific Islands in New Zealand, Australia

Discussion

Species 6 (1 in the flora).

... more about "Pilularia"
David M. Johnson +
Linnaeus +
expanded +
pea--shaped +
Pillwort +
North America +, South America +, Europe +, Pacific Islands in New Zealand +  and Australia +
Latin pilula, a little ball, in reference to the spheric sporocarps +
multicellular +
long-petioled +
terete +  and filiform +
subterranean +
dennis1981a +  and ott1980a +
subterranean +
Pilularia +
Marsileaceae +
amphibious +  and aquatic +