Hydatellaceae are a family of small, aquatic flowering plants. The family consists of tiny, relatively simple plants occurring in Australasia and India. It was formerly considered to be related to the grasses and sedges, but has been reassigned to the order Nymphaeales as a result of DNA and morphological analyses showing that it represents one of the earliest groups to split off in flowering-plant phylogeny, rather than having a close relationship to monocots, which it bears a superficial resemblance to due to convergent evolution. The family includes only the genus Trithuria, which has at least 13 species, although species diversity in the family has probably been substantially underestimated.
Trithuria is a genus of small ephemeral aquatic herb that represent the only members of the family Hydatellaceae found in India, Australia, and New Zealand. All 13 described species of Trithuria are found in Australia, with the exception of T. inconspicua and T. konkanensis, from New Zealand and India respectively. Until DNA sequence data and a reinterpretation of morphology proved otherwise, these plants were believed to be monocots related to the grasses (Poaceae). They are unique in being the only plants besides two members of Triuridaceae in which the stamens are centred and surrounded by the pistils; in Hydatellaceae the resulting 'flowers' may instead represent condensed inflorescences or non-flowers.
Wurmbea is a genus of perennial herbs in the family Colchicaceae, native to Africa and Australia. There are about 50 species, with about half endemic to each continent.
Wurmbea dioica, commonly known as early Nancy, is a species of plant in the family Colchicaceae and is endemic to Australia. It is a herb with three linear to thread-like leaves and usually two to seven white flowers with a purple or greenish nectary band.
Wurmbea monantha is a perennial herb that is native to Western Australia. The white to pink flowers are produced between July and September in its native range.
Murchisonia was a genus of perennial herbs in the family Asparagaceae, subfamily Lomandroideae.
Haemodorum brevicaule is a perennial herb from 0.025 to 0.3 m tall, in the bloodroot family, the Haemodoraceae, native to northern Australia. It has deep-red to purplish-black flowers which are seen from September to December, and it grows on red clay and basalt.
Trithuria inconspicua is a small aquatic herb of the family Hydatellaceae that is only found in New Zealand.
Wurmbea sinora is a species of plant in the Colchicaceae family that is endemic to Australia.
Wurmbea odorata is a species of plant in the Colchicaceae family that is endemic to Australia.
Wurmbea murchisoniana is a species of plant in the Colchicaceae family that is endemic to Australia.
Wurmbea inframediana is a species of plant in the Colchicaceae family that is endemic to Australia.
Wurmbea dilatata is a species of plant in the Colchicaceae family that is endemic to Australia.
Wurmbea cernua is a species of plant in the Colchicaceae family that is endemic to Australia.
Wurmbea centralis is a species of plant in the Colchicaceae family that is endemic to Australia.
Wurmbea latifolia, also known as Broadleaf Early Nancy, is a species of plant in the Colchicaceae family that is endemic to Australia.
Wurmbea densiflora is a species of plant in the Colchicaceae family that is endemic to Australia.
Wurmbea pygmaea, also known as One-flower Nancy, is a species of plant in the Colchicaceae family that is endemic to Australia.
Wurmbea biglandulosa is a species of plant in the Colchicaceae family that is endemic to Australia.
Haemodorum gracile is a plant in the Haemodoraceae family, native to Western Australia, and was first described by Terry Desmond Macfarlane in 1987.
