Jepson eFlora: Taxon page
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Triglochin palustris

Higher Taxonomy
Family: JuncaginaceaeView Description 

Habit: Annual, perennial herb, rhizomed or dense-tufted, terrestrial or aquatic. Leaf: generally +- basal, alternate, +- flat to narrow-cylindric; sheath open, generally liguled. Inflorescence: spike or generally +- scapose raceme; bracts 0. Flower: generally bisexual; perianth parts generally 6 in 2 whorls (0, 1) [3, 4], free, scale-like, +- green or tinged +- red-purple; stamens 0, 1, 3, or 6, filaments short, +- fused to perianth; pistil 1, carpels 1, 6 [3, 4], +- fused, separating in fruit [or not], each with 1 chamber and 1 ovule or 3 carpels fertile, 3 sterile, placentas basal, stigmas generally +- sessile. Fruit: achene or generally mericarps.
Genera In Family: 3 genera, 30 species: temperate, circumboreal, Australia, southern Africa, South America. Note: Lilaea included in Triglochin.
eFlora Treatment Author: David J. Keil
Scientific Editor: Thomas J. Rosatti.
Genus: TriglochinView DescriptionDichotomous Key

Common Name: ARROW-GRASS
Habit: Plant +- glabrous. Leaf: basal, +- tufted; sheath membranous; ligule tip entire to 2-lobed [0]. Flower: perianth parts generally adaxially concave; anthers +- sessile; stigma papillate or +- plumose. Fruit: achene or generally 3, 6 mericarps. Seed: 1, linear, +- flat or angled.
Species In Genus: +- 20 species: temperate, circumboreal, Australia, southern Africa, South America. Etymology: (Greek: 3 points, from fruits of some) Toxicity: TOXIC when fresh, from cyanogenic compounds.

Triglochin palustris L.
Habit: Perennial herb 1--3(5.5) dm, tufted; rhizomes ascending, +- stout. Leaf: 5--30 cm, 0.5--2 mm wide, +- elliptic in ×-section; ligule 0.5--1.5 mm, tip generally deep-2-lobed. Inflorescence: aerial raceme, generally 1--2 per pl, generally > leaves; pedicels generally 4--6 mm in fruit, erect. Flower: perianth parts generally 6, 1.5--2 mm; stamens 6; fertile carpels 3. Fruit: mericarps 3, 5--7(9) mm, distally clinging to fruit axis, abaxially weak-ridged. Chromosomes: 2n=24.
Ecology: Wet meadows, wet flats, stream and lake margins; Elevation: 2100--3450 m. Bioregional Distribution: c&s SNH; Distribution Outside California: circumboreal, South America, New Zealand. Flowering Time: Jul--Aug
eFlora Treatment Author: David J. Keil
Jepson Online Interchange
Listed on CNPS Rare Plant Inventory

Previous taxon: Triglochin maritima
Next taxon: Triglochin scilloides

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botanical illustration including Triglochin palustris


Citation for this treatment: David J. Keil 2016. Triglochin palustris, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on May 03, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on May 03, 2016.

Triglochin palustris
click for enlargement
© 2008 Steve Matson
Triglochin palustris
click for enlargement
© 2008 Steve Matson
Triglochin palustris
click for enlargement
© 2008 Steve Matson

More photos of Triglochin palustris in CalPhotos

Geographic subdivisions for Triglochin palustris:
c&s SNH;
Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.