Single Record

Comments: In the Watershed the monocot seaside arrowgrass has been found most often in the Basin on alkali flats and by ponds and lakes, but occasionally Triglochin maritima ranges far up into the montane by creek sides (e.g., upper Sand Creek in the north Cristos at 11,200', Saguache Co, 2010). in the Watershed, it is much more common than T. palustris. It is present in every USA state west of the Great Plains, in the northern Great Plains, and on into New England. It follows the Rio Grande drainage spottily through New Mexico down to Presidio Co, Texas (just west of the Big Bend country). Note that spacing of flowers is not a very reliable trait to distinguish T. maritima from T. palustris, since the second often has flowers tightly packed toward the distal end of the spike and widely spaced toward the proximal. However, in T. maritima the fruiting receptacles are not winged, in T. palustris winged. If the plant is not in fruit, size can help. If it is over 7 dm in height, it is probably T. maritima. If under 3 cm, probably T. palustris.