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§1 Plant

Callitriche heterophylla Pursh

vernacular twoheaded water-starwort — species · Callitrichaceae

USDA
CAHE3
GBIF
5372482
Rank
species
twoheaded water-starwort (Callitriche heterophylla)
Platephotograph · Stephen TironeCC BY-NC source · iNaturalist ↗

§2Habit & range

Habit and range

Growth habit
Forb/herb
Duration
Annual, Perennial
Group
Dicot
Family
Callitrichaceae Link.
Genus
Callitriche
§2a

Native status, by region

  • AK Alaska Native
  • CAN Canada Native
  • GL Greenland Native
  • L48 Lower 48 States Native
§2b

County-level range

· 887 counties across 46 states/territories
Legend Native · 887 Introduced · 0 Both · 0 Hover a county for detail.

§3Cultivation specs · USDA

Recorded by the USDA Plant Materials Program.

§3a

Tolerances

Drought
None
Shade
High
Moisture use
High
Fire
High
Salinity
None
Anaerobic
High
CaCO₃
Medium
Hedging
None
§3b

Climate & soil

Cold tolerance
-33 °F minimum
Frost-free days
80 min.
pH range
5.2–6.8
Fertility need
Medium
Soil texture
medium, fine
§3c

Form & growth

Growth form
Single Crown
Growth rate
Rapid
Lifespan
Short
Foliage texture
Fine
Foliage colour
Green
Porosity (summer)
Porous
Porosity (winter)
Porous
Flower colour
Green
Fruit colour
Green
Fire resistant
Yes
N fixation
None
Toxicity
None
§3d

Reproduction

Bloom period
Spring
Seed abundance
Low
Seed begins
Summer
Seed ends
Fall
Spread rate
Moderate
Stratify
No
Seeds / lb
850,000
Propagation
seed, sprigs
§3e

Use & availability

Commercial availability
No Known Source
Nursery stock
No
Palatable, human
No
Lumber
No
Christmas tree
No

§4Counties, by state

Recorded in 887 counties across 46 states/territories.

Alabama view state ↗ 3 N ▾
Alaska view state ↗ 11 N ▾
Arizona view state ↗ 7 N ▾
Arkansas view state ↗ 33 N ▾
California view state ↗ 32 N ▾
Colorado view state ↗ 3 N ▾
Delaware view state ↗ 3 N ▾
District of Columbia view state ↗ 1 N ▾
Florida view state ↗ 8 N ▾
Georgia view state ↗ 29 N ▾
Idaho view state ↗ 3 N ▾
Illinois view state ↗ 37 N ▾
Indiana view state ↗ 21 N ▾
Iowa view state ↗ 2 N ▾
Kansas view state ↗ 20 N ▾
Kentucky view state ↗ 26 N ▾
Louisiana view state ↗ 42 N ▾
Maine view state ↗ 12 N ▾
Massachusetts view state ↗ 14 N ▾
Michigan view state ↗ 2 N ▾
Minnesota view state ↗ 9 N ▾
Mississippi view state ↗ 8 N ▾
Missouri view state ↗ 57 N ▾
Montana view state ↗ 4 N ▾
Nevada view state ↗ 2 N ▾
New Hampshire view state ↗ 8 N ▾
New Jersey view state ↗ 16 N ▾
New Mexico view state ↗ 6 N ▾
New York view state ↗ 32 N ▾
North Carolina view state ↗ 49 N ▾
Ohio view state ↗ 36 N ▾
Oklahoma view state ↗ 17 N ▾
Oregon view state ↗ 21 N ▾
Pennsylvania view state ↗ 57 N ▾
Rhode Island view state ↗ 3 N ▾
South Carolina view state ↗ 27 N ▾
South Dakota view state ↗ 2 N ▾
Tennessee view state ↗ 38 N ▾
Texas view state ↗ 52 N ▾
Utah view state ↗ 8 N ▾
Vermont view state ↗ 9 N ▾
Virginia view state ↗ 73 N ▾
Washington view state ↗ 14 N ▾
West Virginia view state ↗ 16 N ▾
Wisconsin view state ↗ 11 N ▾
Wyoming view state ↗ 3 N ▾

§5Sources & provenance

USDA PLANTS

Symbol, taxonomy, distribution, cultivation specs, native status. Public domain.

plants.usda.gov/CAHE3 ↗

GBIF Backbone

Canonical taxonomic identity, synonym resolution, cross-refs. CC0.

gbif.org/species/5372482 ↗

Record version

Cached and built locally. Source version on this record:

usda-plants-mt-2026-05-26

fetched 2026-05-26T20:46:58Z