BugwoodWiki Article

swamp stonecrop
Crassula helmsii A. Berger

Overview

Appearance
Crassula helmsii is an aquatic or semi-terrestrial succulent perennial herb that grows from 4-50 in. (10-130 cm) long. It has round stems that float on the water or creep along the ground. The stems root at the nodes. C. helmsii is native to Australia and New Zealand.
Foliage
The opposite leaves of C. helmsii are sessile and succulent. Leaves are from 0.16-0.8 in. (4–20 mm) long by 0.03-0.06 in. (0.7–1.6 mm) wide. They are linear-lanceolate to ovate-lanceolate with an acute apex.
Flowers
The inflorescence is borne singly in the axils of leaves. The flower has four petals which are white to pinkish and slightly longer than the sepals.
Fruit
The fruit of C. helmsii is a single carpel containing up to 5 elliptical smooth seeds.
Ecological Threat
C. helmsii can establish monocultures that displace native plants, increase oxygen levels, cause flooding, obstruct water flow, and reduce recreational value of lakes or ponds. This plant can lead to an overall reduction in biodiversity.

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: Magnoliopsida
Subclass: Rosidae
Order: Rosales
Family: Crassulaceae
Genus: Crassula

Other System Links

Plants: CRHE5
GRIN: 416223
ITIS: 565979

Categories

Category: Forbs/Herbs