Common name: Prickly Water-nymph, Prickly Waternymph, Prickly Naiad
Najas marina L. APNI*
Description: Submerged aquatic dioecious annual to 3 m high.
Leaves to 5 cm long and 5 mm wide with numerous large spine-tipped teeth along the margins; surfaces (especially the midrib) and/or internodes may have similar teeth; sheathing base without auricles.
Flowers unisexual, axillary, solitary. Male flowers spatheate, 3–4 mm long, with the single stamen 1–3 mm long and 4-sporangiate. Female flowers without a spathe, 3–4 mm long, mostly with 3 stigmas.
Seed mostly 3–6 mm long, covered with irregularly arranged pits.
Flowering: Flowers during warmer months, the whole plant becoming detached when mature and drifting around dropping seeds.
Distribution and occurrence: Grows in lakes with fresh or brackish water, coastal sites and inland near Griffith.
NSW subdivisions: NC, CC, SWP
Other Australian states: Vic. N.T. W.A.
Text by S. W. L. Jacobs
| ||Key to the subspecies|| |
|1||Stems and midrib on lower surface of leaves with fewer than 1 spine per cm||subsp. latior|
|Stems and midrib on lower surface of leaves with >1 spine per cm||subsp. armata|
APNI* Provides a link to the Australian Plant Name Index (hosted by the Australian National Botanic Gardens) for comprehensive bibliographic data
***The AVH map option provides a detailed interactive Australia wide distribution map drawn from collections held by all major Australian herbaria participating in the Australian Virtual Herbarium project.