Wolffiella gladiata — sword-like bog-mat
![Thalli: Wolffiella gladiata. ~ By Gordon Morrison. ~ Copyright © 2024 New England Wild Flower Society. ~ Image Request, images[at]newenglandwild.org](https://newfs.s3.amazonaws.com/taxon-images-1000s1000/Araceae/wolffiella-gladiata-ta-gmorrison.jpg)
![Roots: Wolffiella gladiata. ~ By Julian A. Steyermark. ~ Copyright © 2024. ~ Allison Brock, Allison.Brock[at]mobot.org ~ Steyermark, Julian A. 1963. The Flora of Missouri. The Iowa State U. Press, Ames, IA. 1725pp.](https://newfs.s3.amazonaws.com/taxon-images-1000s1000/Araceae/wolffiella-gladiata-ro-jsteyermark1.jpg)
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Facts
N/A
Habitat
Lacustrine (in lakes or ponds), riverine (in rivers or streams)
New England distribution
Adapted from BONAP data
Native: indigenous.
Non-native: introduced (intentionally or unintentionally); has become naturalized.
County documented: documented to exist in the county by evidence (herbarium specimen, photograph). Also covers those considered historical (not seen in 20 years).
State documented: documented to exist in the state, but not documented to a county within the state. Also covers those considered historical (not seen in 20 years).
Note: when native and non-native populations both exist in a county, only native status is shown on the map.
Found this plant? Take a photo and post a sighting.
enlargeCharacteristics
- Habitat
- aquatic
- New England state
- Massachusetts
- Roots
- there are no roots on the plant
- Thallus shape in cross-section
- the thallus is somewhat flattened on at least one side in cross-section
- Thallus length
- 3–9 mm
- Thallus shape
-
- the thallus is another shape in outline
- the thallus is very narrow with more or less parallel sides
- Thallus dimensions
- 4–20
- Veins on upper surface
- 0
-
Flowers
- Scale surrounding flower
- no
- Stamen number
- 1
-
Fruits or seeds
- Fruit length
- 0.3–0.4 mm
- Seed surface ribbed
- the seed surface is nearly smooth
-
Growth form
- Root length
- 0 mm
- Root number
- 0
- Root sheath winged at base
- NA
- Roots
- there are no roots on the plant
- Roots perforating basal scale
- NA
- Thallus dimensions
- 4–20
- Thallus edge
- the edge of the thallus is smooth (without teeth) near the tip
- Thallus length
- 3–9 mm
- Thallus shape
-
- the thallus is another shape in outline
- the thallus is very narrow with more or less parallel sides
- Thallus shape in cross-section
- the thallus is somewhat flattened on at least one side in cross-section
- Thallus width
- 0.4–0.7 mm
- Thallus with red pigment
- no
- Turions
- no
-
Leaves
- Papilla on thallus
- no
- Veins on upper surface
- 0
-
Place
- Habitat
- aquatic
- New England state
- Massachusetts
- Specific habitat
-
- in lakes or ponds
- in rivers or streams
Wetland status
Occurs only in wetlands. (Wetland indicator code: OBL)
In New England
Distribution
- Connecticut
- absent
- Maine
- absent
- Massachusetts
- present
- New Hampshire
- absent
- Rhode Island
- absent
- Vermont
- absent
Conservation status
Exact status definitions can vary from state to state. For details, please check with your state.
- Massachusetts
- unranked (S-rank: SNR), #NAME? (code: #NAME?)
From Flora Novae Angliae dichotomous key
1. Wolffiella gladiata (Hegelm.) Hegelm. NC
sword-like bog-mat. Wolffia floridana (J.D. Sm.) J.D. Sm. ex Hegelm.; W. gladiata Hegelm.; W. gladiata Hegelm. var. floridana J.D. Sm.; Wolffiella floridana (J.D. Sm.) C.H. Thompson • MA. Still or slow-moving, mesotrophic water of lakes and streams.