Japanese name: ノタヌキモ（野狸藻） Scientific name:Utricularia aurea
[Overview]
An annual found in nutrient-poor to moderately nutrient-rich waters such as irrigation ponds and lakes, but it is said to be a perennial in the subtropics and tropics.
A carnivorous plant.
It has no roots and is free-floating.
It does not form winter buds.
The stems branch freely and sometimes grow as long as 1.5 m.
The leaves are alternate and branch into 3–4 parts from the base; the leaflets are broadly lanceolate, 3–8 cm long, further divided in a pinnate manner, and spread out three-dimensionally.
The leaf segments are thread-like with small bristles on the margins and tips, and also bear many bladders.
The bladders are ovoid, about 1–4 mm in diameter, with a valve that opens inward; when small animals such as water fleas approach, the valve opens and sucks them in.
A raceme is borne on a flower stalk standing erect about 8–20 cm above the water surface, and the flower stalk has no scale leaves.
Four to ten flowers are borne; they are yellow and lipped, about 0.6–0.7 cm in diameter, with the base of the lower lip swollen, and reddish brown markings on the lower lip and the spur.
The spur is behind the flower and curves forward.
The fruit is a spherical capsule, with the style remaining like a horn.
