The genus name of the unbranched bur-reed (Sparganium emersum), means ‘band' in Greek, referring to the ribbon-like leaves that are a feature shared by all members of the genus (3). The long, broad leaves of this species (4) are generally rather limp and float on the surface of the water (2).
A dioecious species (4), the female and male flowers of the unbranched bur-reed are borne on separate inflorescences, on which there are either between one and six pistils or three and seven stamens (2). The pistils are positioned beneath the stamens on the stem (4), and the leaves are significantly longer than the inflorescences (5). The achene of the unbranched bur-reed is spherical and the upper half is covered in spindle-like appendages that are not present on the lower surface, which is bare and patterned with red specks (5) (6).
- Rubanier émergeant, Rubanier simple.
- Length: up to 2 m (2)