Species
Callitriche petriei subsp. chathamensis
Etymology
Callitriche: From the Greek kalli 'beautiful' and thrix 'hair', referring to the beautiful stems
petriei: Named after Donald Petrei (1846 -1925), Otago botanist
Common Name(s)
Chatham Island starwort
Current Conservation Status
2012 - At Risk - Naturally Uncommon
Conservation status of New Zealand indigenous vascular plants, 2012
The conservation status of all known New Zealand
vascular plantVascular plant:
A plant that possesses specialised conducting tissue (xylem and phloem). This includes flowering plants, conifers and ferns but excludes mosses, algae, lichens and liverworts.
Taxa:
Taxonomic groups. Used to refer to a group at any level e.g., genus, species or subspecies.
at the rank of species and below were reassessed in 2012 using the New Zealand Threat Classification System (NZTCS). This report includes a statistical summary and brief notes on changes since 2009 and replaces all previous NZTCS lists for vascular plants. Authors: Peter J. de Lange, Jeremy R. Rolfe, Paul D. Champion, Shannel P. Courtney, Peter B. Heenan, John W. Barkla, Ewen K. Cameron, David A. Norton and Rodney A. Hitchmough. File size: 792KB
Previous Conservation Status
2009 - At Risk - Naturally Uncommon
2004 - Range Restricted
Qualifiers
2012 - IE, RR, Sp
2009 - IE
Authority
Callitriche petriei subsp. chathamensis R.Mason
Family
Plantaginaceae
Flora Category
Vascular - NativeNative:
Naturally occurring in New Zealand (i.e., not introduced accidentally or deliberately by humans).
CALPSC
The
National Vegetation Survey (NVS) Databank is a physical archive and electronic databank containing records of over 94,000 vegetation
surveySurvey:
Collection of observations on the spatial distribution or presence or absence of species using standardised procedures.
plots - including data from over 19,000 permanent plots. NVS maintains a standard set of species code abbreviations that correspond to standard scientific plant names from the Ngä Tipu o Aotearoa - New Zealand Plants database.
Structural Class
Dicotyledonous Herbs other than Composites
Synonyms
None
Distribution
EndemicEndemic:
Unique or confined to a place or region, found naturally nowhere else.
Habitat
Found on wet, peaty ground, commonly at the edges of streams and lakes, on bare peatPeat:
A mass of partially carbonised plant tissue formed by partial decomposition in water of various plants and especially of mosses of the genus Sphagnum, widely found in many parts of the world, varying in consistency from a turf to a slime used as a fertiliser, as stable litter, as a fuel, and for making charcoal. Partially carbonized vegetable matter saturated with water; can be used as a fuel when dried. A type of soil deriving from dead organic material situated in a wet area, where the reduced amount of [[oxygen available in the wet conditions results in the organic material not decomposing as much as it usually would do so in the presence of more oxygen. Used in growing media. Represents an important carbon sink -drainage of peat releases large amounts of carbon (CO2) to the atmosphere.
Features
Diminutive, monoeciousMonoecious:
Having male and female flowers on the same plant of the same species.
Perennial:
A plant lasting for three seasons or more
Ascending:
Growing obliquely upward.
Spathulate:
Spatula or spoon-shaped, a rounded blade tapering gradually to the base.
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Orbicular:
Almost or approximately circular.
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Midrib:
The central or principal vein of a leaf or pinna of a fern.
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Lateral:
On or at the side.
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Alternate:
Attached singly at each node but changing from one side of a stem to the other.
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Elliptic:
Broadest at the middle
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Similar TaxaTaxa:
Taxonomic groups. Used to refer to a group at any level e.g., genus, species or subspecies.
Differs from C. petriei R.Mason subsp. petriei by its monoeciousMonoecious:
Having male and female flowers on the same plant of the same species.
Dioecious:
Having male and female flowers on separate plants of the same species.
Click thumbnails to enlarge
Flowering
January - March
Fruiting
January - March
Propagation Technique
Easy to grow from rooted pieces and rapidly becomes invasive. Not avery attractive plant for a garden but could be useful on the marginMargin:
The edge or border of a leaf
Threats
Not threatened and only listed because it is an island endemicEndemic:
Unique or confined to a place or region, found naturally nowhere else.
Chromosome No.
2n = 20
EndemicEndemic:
Unique or confined to a place or region, found naturally nowhere else.
Taxon:
A taxonomic group. Used to refer to a group at any level e.g., genus, species or subspecies.
Yes
EndemicEndemic:
Unique or confined to a place or region, found naturally nowhere else.
Genus:
A taxonomic rank of closely related forms that is further subdivided in to species (plural = genera). In a scientific name (e.g., Sicyos australis), the first word is the genus, the second the species.
No
EndemicEndemic:
Unique or confined to a place or region, found naturally nowhere else.
No
Where To Buy
Can be purchased from Oratia NativeNative:
Naturally occurring in New Zealand (i.e., not introduced accidentally or deliberately by humans).
This page last updated on 18 Jan 2010