Rock Quillwort / Center For Plant Conservation
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Plant Profile

Rock Quillwort (Isoetes lithophila)

Photo Credit: Bill Carr
  • Global Rank: G1 - Critically Imperiled
  • Legal Status: N/A
  • Family: Isoetaceae
  • State: TX
  • Nature Serve ID: 147798
  • Lifeform: Graminoid
  • Date Inducted in National Collection: 06/25/2002
Description:

Where is Rock Quillwort (Isoetes lithophila) located in the wild?

Habitat:

ephemeral pools on granitic and other igneous substrates

Distribution:

NA

States & Provinces:

Rock Quillwort can be found in Texas

Conservation Actions

Nature Serve Biotics
  • 05/02/2017

Endemic to Llano, Mason, and Burnet counties on the Edwards Plateau in Texas. Requires a specialized, ephemeral habitat: pools on granite outcrops which retain water long enough to allow plants to reach maturity. Granite quarries threaten some sites.

  • 01/01/2010

10 known populations; including Enchanted Rock State Natural Area

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Nomenclature
Taxon Isoetes lithophila
Authority N. Pfeiffer
Family Isoetaceae
CPC Number 2344
ITIS 503214
USDA ISLI
Duration Perennial
Common Names Rock Quillwort
Associated Scientific Names Isoetes lithophila
Distribution NA
State Rank
State State Rank
Texas S2
Ecological Relationships

Photos

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