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Montana Field Guide

Montana Field Guides

Water Pigmy-weed - Tillaea aquatica
Other Names:  Crassula aquatica

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Status Under Review
Native Species

Global Rank: G5
State Rank: SU
(see State Rank Reason below)
C-value: 6


Agency Status
USFWS:
USFS:
BLM:


 

External Links

State Rank Reason (see State Rank above)
Collected in Sanders County. Status in the state unresolved.
 
General Description
Small glabrous annual. Stems prostrate to ascending, branched, 1–4 cm. Leaves all cauline, opposite, linear, terete, 3–6 mm long, united around the stem. Flowers solitary in leaf axils, 4-merous, calyx up to 1 mm long; petals white, 1–2 mm long. Follicles 1–1.5 mm long, erect, deep red; seeds 1 to few per follicle (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Range Comments
Spotty distribution throughout the Northern Hemisphere.

Habitat
Mud or shallow water along ponds, streams; valleys (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
  • Literature Cited AboveLegend:   View Online Publication
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2022. Manual of Montana Vascular Plants, Second Edition. Fort Worth, TX: BRIT Press. viii + 779 p.
  • Web Search Engines for Articles on "Water Pigmy-weed"
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Citation for data on this website:
Water Pigmy-weed — Tillaea aquatica.  Montana Field Guide.  .  Retrieved on , from