Micranthemum tweediei

Tweedie's pearlweed

Aquarium suitability: yes
Usage: Foreground, ground cover
Difficulty: easy
Growth: medium
See also: Micranthemum sp. "Montecarlo-3"
Range and localities: 

Northeastern Argentina, South Brazil, Uruguay

Height: 1 - 3 cm

Availability [?]: 
  • frequently available commercially
  • frequently available from other aquarists

Common names: 
  • Tweedie's pearlweed
  • Montecarlo pearlweed
  • New Large Pearl Grass
  • Bacopita

  • Micranthemum sp. ''Montecarlo-3''
  • Micranthemum sp. ''Montecarlo''
  • Micranthemum sp. ''Monte Carlo''

Misapplied names: 
  • Elatine hydropiper
  • Bacopa sp. ''Parana-í Guazú''
  • Hemianthus sp. ''Parana-í Guazú''

Habit, plant type:

  • stem
  • rhizome or creeping stem
Botanical name [?]: Micránthemum tweediei Benth.

Major group (unranked): Seed plants: Flowering plants (Angiosperms)
Order: Lamiales
Family: Linderniaceae
Genus: Micranthemum


(not yet translated into English)

References and further reading:
  1. Kasselmann, C. (2017): Tweedies Perlenkraut - Porträt einer neuen Vordergrundpflanze. - DATZ 11/2017: 50-55.
  2. Blog of "azulaquarium" (in Japanese), posting from 20 November 2010 (, accessed 08 August 2013)
References (range and localities):
  1. Kasselmann, C. (2017): Tweedies Perlenkraut - Porträt einer neuen Vordergrundpflanze. - DATZ 11/2017: 50-55.
Light medium to high 
Carbonate hardness 2 to 12 °dKH
pH value 5 to 7 
Carbon dioxide (CO2) 20 to 40 mg/l

Growth: medium

Propagation: Cuttings, Splitting, cutting off daughter plants

Can grow emersed?: yes

Suited for outdoor cultivation / ponds: unknown

Winter hardiness: unknown


(not yet translated into English)

Aquascaping: forms a small-leaved carpet

light green
medium green

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TODO Micranthemum tweediei is also known as Tweedie's pearlweed, Montecarlo pearlweed, New Large Pearl Grass and Bacopita. TODO

Wasserpflanzen sind ein fester Bestandteil der meisten Aquarien. Beim Aquascaping, dem Naturaquarium, Biotop-Aquarium oder dem Gesellschaftsaquarium sind Wasserpflanzen nicht nur für die Wasserqualität entscheidend, sondern sorgen auch stets für eine optische Aufwertung des Aquariums.