This section is from the book "British Wild Flowers - In Their Natural Haunts Vol5-6", by A. R. Horwood. Also available from Amazon: A British Wild Flowers In Their Natural Haunts.
Utricularia neglecta, Lehm. ( = U. major, Schmidt). - The habitat of this plant is pools in heathy places. Similar to U. vulgaris, this species was formerly regarded as a sub-species. There is a slender stem and scape. The leaves are not so large as in the last, more distant. The stems are slender, or hairlike. The leaves are nearly round, with awl-like, entire segments, pinnate, and much-divided, fringed with hairs in places. On the leaves are the small bladders, which are shortly-stalked. The scape is very slender. The corolla is pale-yellow, borne on slender stalks, 4-5 times as long as the lance-shaped bract, with a spur which is conical, directed upwards, and projecting, ovate to oblong, blunt or notched, not closely pressed to the upper lip. The upper lip is 2-3 times as long as the palate. The lower lip has a broad, flat, spreading margin. The flower-stalks are ascending in fruit. The plant is 6-8 in. in height, flowering between June and August, and is a herbaceous perennial.
The habitat of this plant is pools, ditches, pits. The habit is as in the last, and U. vulgaris. The stems are threadlike. The leaves are regularly forked in two parts, much-divided, loose, broad, round, with awl-like, entire segments, not fringed with hairs. The pitchers have slender stalks. The scapes bear 2-6 small flowers, pale-yellow. The flower-stalks are 2-3 times as long as the calyx, bent down in fruit. The upper lip of the corolla is as long as the small palate, the lower broadly ovate, with a flat spreading margin. The spur is very short, small, and blunt. The sepals are round, long-pointed. The anthers are free. The plant is 3-10 in. in height, flowering from June to September, and is a herbaceous perennial.
The habitat of this plant is pools, ditches, bogs, pits. The habit is as in the last. The stem is slender. The leaves are in 2 rows, close, repeatedly forked, much-divided, 3-partite, broad, round, with awl-like, linear segments, with a fringe of distant hairs. The pitchers are on slender stalks, on leafless branches. The scape is stout. The flower-stalks are as long as the calyx. The flowers are pale-yellow. The upper lip is longer by twice than the swollen palate. The lower lip has a broad and flat, spreading margin. The spur is closely pressed to the lower lip, and is conical and acute. The flower-stalk is 4-5 times as long as the ovate bract, and erect in fruit. The plant is 4-8 in. in height, and flowers between July and September, being a herbaceous perennial.
This species is found in Scotland in Nairn, Moss of Inshoch, and Moray, Loch of Spynie, Elgin, Gordon Moss, Berwickshire. From the Lesser Bladderwort it differs in the larger flowers, which have a short conical spur, and a flat, rounded lower lip. The habit is also more robust.