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Species Image Gallery (opens in a new window) |
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| THE PONDWEED FAMILY | |||||||||
| The pondweeds grow in the water. Most species have submersed and floating leaves. The leaves are alternately arranged on the stem and have membranous stipules. The inflorescences are spike-like with the flowers in whorls. Each flower has four greenish tepals and four stamens. The fruit can be fleshy or dry. | |||||||||
| ROBBIN’S PONDWEED | |||||||||
| LATIN NAME: Potamogeton robbinsii | |||||||||
| WHAT DOES IT LOOK LIKE? | |||||||||
| Robbin’s pondweed grows up to 100 cm long in the water. The stem is branched and does not have spots or glands. The leaves are all underwater and are in two vertical rows. The leaves are lobed at the base and are dark green to reddish-green in colour. The margin is spiny to saw-toothed. The stipules are greenish-brown to white. The flowers are small and greenish and are in spike-like clusters. The fruit is fleshy and one-seeded. | |||||||||
| WHERE DOES IT GROW? | |||||||||
| Robbin’s pondweed grows in shallow water of quiet lakes and ponds. | |||||||||
| WHERE IS IT FOUND IN SASKATCHEWAN? | |||||||||
| This plant is found in northern to east-central Saskatchewan in the Mid-Boreal Upland, Mid-Boreal Lowland, and Churchill River Upland ecoregions. | |||||||||
| WHY IS IT RARE? | |||||||||
| Robbin’s pondweed is threatened because it is rare or uncommon in Saskatchewan. It is usually locally numerous within limited areas. No threats are known or anticipated for this species. | |||||||||
| HOW TO IDENTIFY LARGELEAF PONDWEED | |||||||||
| * Are the leaves all underwater? * Is the stem lacking both yellow glands at the base of the leaves and reddish spots? * Are the flowers greenish and in spikes? * Did you find in a water body in northern to east-central Saskatchewan? | |||||||||
If you answered yes to all of these questions, you may have found Robbin’s pondweed! |
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