Botany
Cressa is a genus of plants in the morning glory family known generally as alkaliweeds. These plants are native to the tropical and subtropical areas of the world. They are clumpy and low-growing but usually have erect stems covered white-haired, green leaves. They produce tiny white flowers about half a centimeter across. There are four species recognised in the genus Cressa: Cressa australis Cressa cretica Cressa nudicaulis Cressa truxillensis
Cultivated plant taxonomy.
Hydnoroideae.
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