Triglochin maritima

Linnaeus

Sp. Pl. 1: 339. 1753 (as maritimum).

Common names: Arrow grass Troscart maritime
WeedyIllustrated
Synonyms: Triglochin concinna J. B. Davy Triglochin concinna var. debilis (M. E. Jones) J. T. Howell Triglochin debilis Nuttall Triglochin elata
Treatment appears in FNA Volume 22.

Plants with fibrous strands of old leaves at base, 3.5–61.5 cm. Leaves erect from sheath, mostly shorter than scape, 2.2–11.5 cm; sheath 0.7–2.5 cm × 1–1.8 mm, ligule occasionally hoodlike, apically 2-lobed; blade 0.9–1.4 mm wide, apex obtuse to round. Inflorescences: scape often purple near base, mostly exceeding leaves, 1–16.5 cm × 0.5–1 mm; racemes 6–45 cm × 1.5–7 mm; pedicel 1–4 × 0.2–0.3 mm. Flowers: tepals elliptic, 1.3–1.7 × 0.6–1.4 mm, apex acute; pistils 6, all fertile. Fruits: fruiting receptacle without wings; schizocarps linear to near globose, 2–4.5 × 1.5–2 mm; mericarps linear to linear-obovate, weakly ridged, 1.5–3.5 × 0.7–1 mm, beak erect to recurved, 0.2 mm. 2n = 12, 24, 36, 48, 120.


Phenology: Flowering summer–fall.
Habitat: Coastal and mountain marsh areas and moist alkaline meadows
Elevation: 0–4000 m

Distribution

V22 415-distribution-map.jpg

Alta., B.C., Man., N.B., Nfld. and Labr., N.W.T., N.S., Nunavut, Ont., P.E.I., Que., Sask., Yukon, Alaska, Ariz., Calif., Colo., Conn., Idaho, Ill., Ind., Iowa, Kans., Maine, Mass., Mich., Minn., Mont., Nebr., Nev., N.H., N.J., N.Mex., N.Y., N.Dak., Ohio, Okla., Oreg., Pa., R.I., S.Dak., Utah, Vt., Wash., Wis., Wyo., Mexico, South America, n Europe, n Asia

Discussion

This taxon has been separated into Triglochin concinna and T. maritima based upon the lobing of the ligule and the smaller size of the plants of the former (e.g., J. L. Reveal 1977; R. F. Thorne 1993). On a local basis such a separation seems warranted. Examination of the T. maritima complex throughout the Americas, however, reveals continuous variation from small, widely spaced plants with 2-lobed ligules to large, tufted plants with unlobed ligules, including plants with all combinations of those characters.

Triglochin maritima is important in livestock management because it is quite toxic: it is a cyanide producer.

Lower Taxa

None.

"not elongating" is not a number.

... more about "Triglochin maritima"
120 +, 48 +, 36 +, 24 +  and 12 +
acute +, obtuse +  and round +
Robert R. Haynes +  and C. Barre Hellquist +
Linnaeus +
erect +  and recurved +
0.2 cm2 mm <br />0.002 m <br /> (?) +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.14 cm1.4 mm <br />0.0014 m <br />) +
Arrow grass +  and Troscart maritime +
Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. +, N.W.T. +, N.S. +, Nunavut +, Ont. +, P.E.I. +, Que. +, Sask. +, Yukon +, Alaska +, Ariz. +, Calif. +, Colo. +, Conn. +, Idaho +, Ill. +, Ind. +, Iowa +, Kans. +, Maine +, Mass. +, Mich. +, Minn. +, Mont. +, Nebr. +, Nev. +, N.H. +, N.J. +, N.Mex. +, N.Y. +, N.Dak. +, Ohio +, Okla. +, Oreg. +, Pa. +, R.I. +, S.Dak. +, Utah +, Vt. +, Wash. +, Wis. +, Wyo. +, Mexico +, South America +, n Europe +  and n Asia +
0–4000 m +
short-pedicellate +
Coastal and mountain marsh areas and moist alkaline meadows +
axillary +  and terminal +
2.2 cm22 mm <br />0.022 m <br /> (11.5 cm115 mm <br />0.115 m <br />) +
2-lobed +  and hoodlike +
scarious +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
ridged +, linear +  and linear-obovate +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (?) +  and 0.1 cm1 mm <br />0.001 m <br /> (?) +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.2mm +  and 0.3mm +
not spiraling +
Flowering summer–fall. +
not stipitate +
6 cm60 mm <br />0.06 m <br /> (45 cm450 mm <br />0.45 m <br />) +
spikelike +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
l1958a +
shorter than to longer than leaves +
1cm;16.5cm +
0.5mm;1mm +
auriculate +
0.2 cm2 mm <br />0.002 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
1.5mm +  and 2mm +
persisting +
0.7cm;2.5cm +
1mm;1.8mm +
Weedy +  and Illustrated +
epitepalous +
6 +  and 4 +
Triglochin concinna +, Triglochin concinna var. debilis +, Triglochin debilis +  and Triglochin elata +
Triglochin maritima +
Triglochin +
species +
yellow-green +
distinct +
1.3mm;1.7mm +
conchiform +
0.6mm;1.4mm +