|University of California, Berkeley|
|Jepson eFlora: Taxon page
Key to families | Table of families and genera
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|Family: Potamogetonaceae||View Description||Dichotomous Key|
|Genus: Potamogeton||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Potamogeton amplifolius Tuck.
Habit: Perennial herb, rhizome stout. Stem: < 90 cm, branches 0 or above, cylindric. Leaf: often red-brown; submersed 8--20 cm, 2--7 cm wide, generally lanceolate to ovate, generally folded along midvein, curved backward, acute at both ends, veins 19--50; floating 5--10 cm, 2.5--5 cm wide, elliptic to ovate, tapered or rounded at both ends, veins 27--50; stipules generally 3--10 cm, free, fibrous in age, stringy. Inflorescence: generally < 5 cm. Fruit: 3--5 mm, keels 1 or 3, lateral 0 or lower, sides flat. Chromosomes: n=26.
Ecology: Uncommon. Deep, clear-water lakes; Elevation: 600--1850 m. Bioregional Distribution: NCoR, CaRH, SNH, Wrn; Distribution Outside California: to British Columbia, eastern North America. Flowering Time: Jul--Aug Note: Hybridizes with Potamogeton illinoensis, Potamogeton praelongus, Potamogeton richardsonii.
eFlora Treatment Author: C. Barre Hellquist, Robert F. Thorne & Robert R. Haynes
Jepson Online Interchange
Previous taxon: Potamogeton alpinus
Next taxon: Potamogeton berchtoldii
Citation for this treatment: C. Barre Hellquist, Robert F. Thorne & Robert R. Haynes 2016. Potamogeton amplifolius, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=39553, accessed on September 26, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on September 26, 2016.