We value your privacy

We use cookies and other technologies to enhance your experience, analyse site usage, help with reporting, and assist in other ways to improve the website. You can choose to allow cookies and other technologies or decline. Your choice will not affect site functionality.

Click for help
Volume III (1980) - Flora of New Zealand Adventive Cyperaceous, Petalous & Spathaceous Monocotyledons
Copy a link to this page Cite this record

Potamogeton L.

POTAMOGETON L.

Characters of the family. Native spp. 4, adventive 1.

Key

1
Leaves with longitudinal nerves well separated, laminae mostly elliptic to oval, or, if oblong, crimped
2
Leaves with longitudinal nerves close, laminae all linear with flat margins
4
2
Leaves of 2 kinds, submersed leaves narrower, floating leaves broad-oval; achenes with strong keel and short beak
2. cheesemanii
Leaves not differing greatly throughout plant, either mostly floating, elliptic, or all submersed, oblong, crimped; achenes either not obviously keeled, or if keeled then with very prominent beak
3
3
Leaves all submersed, oblong, margins crimped, longitudinal nerves 3-5
1. *crispus
Leaves mostly floating, elliptic, margins flat, longitudinal nerves (11) -13-21
5. suboblongus
4
Leaves filiform, < 2 mm wide; stipules membranous, adnate below to leaf; inflorescence discontinuous
4. pectinatus
Leaves linear-oblong, > 2 mm wide; stipules fibrous, free; inflorescence continuous
3. ochreatus
Fig. 6. POTAMOGETON, leaves; A: P. crispus, curled pondweed, margin crimped. B: P. ochreatus, margin flat. C: P. cheesemanii, floating leaf, C 1 submersed leaf. © All rights reserved. [Image: 26XL]
Fig. 6. POTAMOGETON, leaves; A: P. crispus, curled pondweed, margin crimped. B: P. ochreatus, margin flat. C: P. cheesemanii, floating leaf, C 1 submersed leaf. © All rights reserved. [Image: 26XL]
Click to go back to the top of the page
Top