Potamogeton filiformis Pers.
FamilyPotamogetonaceae — APG family: Potamogetonaceae
DescriptionStem filiform, branched especially at base; stipules adnate to base of leaf; sheaths ightly clasping, not much thicker than stem; leaves setaceous, brownish-green, lunt; peduncles filiform, long; spike with 3—4, usually widely separated whorls; ruit about 2 mm long, beakless.
EcologyShallow water. Range in Asia preliminary; plant very scattered there.
Most specimens from area of interest are the northern var. borealis (Raf.) St. John P. borealis Raf.), with shorter, more compact spike of greater length than leaves; low growth, which seems to be merely a growth form, is apparently an adaptation to northern conditions.
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.