BugwoodWiki Article

oxygen weed
Lagarosiphon major (Ridley) Moss

Overview

Appearance
Lagarosiphon major is a perennial, submerged aquatic plant that can grow in dense mats up to 6.6-9.8 ft. (2-3 m) thick.
Foliage
The stems, which can reach the surface, are brittle and sparsely branched, 0.12-0.2 in. (3-5 mm) in diameter and curved towards the base (J-shaped). The leaves are 0.2-0.8 in. (5-20 mm) long and 0.08-0.12 in. (2-3 mm) wide, and occur in alternate spirals along the stem.
Flowers
The flowers have three petals and are very small 0.01 in. (0.25 mm) in diameter and up to 2.4 in. (6 cm) long, and clear-white to pink on the surface.
Fruit
The fruit capsule is beaked with seeds 0.13 in. (0.32 cm) long, averaging nine to a fruit. Lagarosiphon major can also reproduce by stem fragments.
Ecological Threat
Lagarosiphon major is fast-growing and may completely fill the volume of a large shallow lake up to 9.8 in. (3 m) deep. It is native to southern Africa.

Selected Images


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1294052

oxygen weed
Lagarosiphon major
Plant(s)
Rohan Wells
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5396834

oxygen weed
Lagarosiphon major
Foliage
Robert Vidéki
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5396835

oxygen weed
Lagarosiphon major
Foliage
Robert Vidéki

Maps


State Regulated List - This map identifies those states that list this species on their regulated list. For more information, visit Invasive.org

State Regulated List

Taxonomic Rank

Kingdom: Plantae
Phylum: Magnoliophyta
Class: Liliopsida
Subclass: Alismatidae
Order: Hydrocharitales
Family: Hydrocharitaceae
Genus: Lagarosiphon

Other System Links

Plants: LAMA15
GRIN: 316415
ITIS: 565981
NPDN Pest: PCHAIBA

Synonyms and Other Names

Other Common Names:
oxygen-weed, African elodea,South African oxygen weed

Categories

Category: Aquatic