Species: Megalodonta beckii var. beckii
Encyclopedia of Puget Sound
Beck Water-marigold is an aquatic perennial herb with lower stems that are submerged and upper portions usually emergent. Submerged leaves are opposite, sessile, and divided into numerous thread-like segments. The lance-shaped, emergent leaves are sessile, opposite, and 2-4 cm long with sharply toothed margins. Solitary flower heads are borne on the ends of the emergent stems. Each head has 2 series of involucral bracts, with the outer being larger and leafier than the inner bracts. The yellow rays are 1-2 cm long, and the disk flowers are also yellow. Achenes are 10-14 mm long and nearly round in cross-section, with 3-6 long, slender, barbed awns at the tops.
Classification
Dicotyledoneae
Asterales
Asteraceae
Megalodonta
NatureServe
Classification
Ecology and Life History
Beck Water-marigold is an aquatic perennial herb with lower stems that are submerged and upper portions usually emergent. Submerged leaves are opposite, sessile, and divided into numerous thread-like segments. The lance-shaped, emergent leaves are sessile, opposite, and 2-4 cm long with sharply toothed margins. Solitary flower heads are borne on the ends of the emergent stems. Each head has 2 series of involucral bracts, with the outer being larger and leafier than the inner bracts. The yellow rays are 1-2 cm long, and the disk flowers are also yellow. Achenes are 10-14 mm long and nearly round in cross-section, with 3-6 long, slender, barbed awns at the tops.