Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
For up-to-date information about California vascular plants, visit the Jepson eFlora.

JUNCAGINACEAE

ARROW-GRASS FAMILY

Robert F. Thorne

Annual or perennial herb from rhizomes, submersed or emergent, sometimes dioecious or plants with some unisexual flowers
Stem short, erect, ± scapose
Leaves basal or cauline, alternate, generally narrowly cylindric; sheath open, generally liguled
Inflorescence: spike or raceme (terminal) or flowers solitary in axils; bracts 0
Flower: perianth parts generally 6 in 2 whorls (except 0–1 in Lilaea ), free, greenish; stamens generally 1, 3, or 6, filament short, ± fused to inner perianth parts, anthers elongate, dehiscing outward; pistil 1 (simple) or seemingly so (ovaries 3, 4, or 6, fused to central axis, each with 1 chamber and 1 style), ovule 1 per chamber, style short and plumose or long and thread-like
Fruit: follicle or nutlet
Genera in family: 5 genera, ± 20 species: temp and circumboreal.

TRIGLOCHIN

ARROW-GRASS

Perennial from rhizomes in CA, terrestrial or aquatic
Stem erect, short, obscure
Leaves basal, ± tufted; sheath membranous; ligule entire to 2-lobed
Inflorescence: raceme, scapose, narrowly cylindric, glabrous; pedicels short
Flower bisexual; perianth parts 3–6, generally green, inner surface concave; stamens (1)3–6, subsessile, anthers wide; ovaries 3 or 6 (if 6, 3 sometimes sterile), 1-chambered, ± fused to central axis, style short, stigma papillate
Fruit: follicles 3–6, separating from axis
Seed 1, linear, ± flat or angled
Species in genus: ± 12 species: temp and circumboreal
Etymology: (Greek: 3-pointed, from fruits of some)
TOXIC when fresh from cyanogenic compounds.

Native

T. palustris L.

MARSH ARROW-GRASS

Perennial from short, ascending rhizomes, 1–3(5.5) dm
Leaf generally < 30 cm, 0.5–2 mm wide, ± flat; ligule 0.5–1.5 mm, generally 2-lobed
Inflorescences generally 1–2 per plant, generally > leaves; pedicels 2–4 mm in fruit, slender, erect
Flower: perianth parts generally 6, 1.5–2 mm; stamens 6; fertile ovaries 3
Fruits 3 per flower, 6–7(9) mm, linear to narrowly club-shaped, separating from axis base, suspended from axis tip before falling
Chromosomes: 2n=24
Ecology: Uncommon. Wet meadows, wet flats, stream and lake margins
Elevation: 2400–3700 m.
Bioregional distribution: c&s High Sierra Nevada
Distribution outside California: circumboreal
Horticultural information: TRY.
See the CNPS Inventory for information about endangerment and rarity.
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bioregional map for TRIGLOCHIN%20palustris being generated
 
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Triglochin palustris
Retrieve dichotomous key for Triglochin
Overlay Consortium of California Herbaria specimen data by county on this map
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