Myriophyllum verticillatum L.
FamilyHaloragaceae — APG family: Haloragaceae
DescriptionStems 2-3 mm thick at base from elongated rhizome, creeping in mud; leaves pinnate, usually 5 in a whorl, much longer than internodes; flowers in axis of pin- nate to pectinate bracts, longer than flowers; pistillate flowers lacking petals, stami- nate with 4 greenish petals; stamens 8.
EcologyPonds, sluggish streams. Described from Europe.
Propagates by clavate turions with closely appressed leaves. Two varieties occur: var. pinnatifidum Wallr., with long bracts; and var. pectinAitum Wallr., with bracts only slightly longer than the flowers.
Hultén's Flora About

This is a digital representation of Eric Hultén’s ‘Flora of Alaska and Neighboring Territories: A Manual of the Vascular Plants’, which was published by Stanford University Press in 1968. The book was digitized by C. Webb (at UAMN) as part of the Flora of Alaska project, with funding by the US NSF (Grant 1759964 to Ickert-Bond & Webb), and with permission of Stanford University Press. Data and images © 1968 Board of Trustees of the Leland Stanford Jr. Univ. Usage licence: Creative Commons BY-NC-SA 4.0. NB: You may find OCR errors; please refer to the hard-copy if in doubt.