Lathyrus palustris L. Lathyrus myrtifolius Muhl. ex Willd. Lathyrus palustris L. var. linearifolius Ser. Lathyrus palustris L. var. myrtifolius (Muhl. ex Willd.) A. Gray Lathyrus palustris L. var. macranthus (T.G. White) Fernald Lathyrus palustris L. var. meridionalis Butters & H. St. John Lathyrus palustris L. var. pilosus (Cham.) Ledeb. Lathyrus palustris L. ssp. pilosus (Cham.) Hultén Lathyrus palustris L. var. retusus Fernald & H. St. John Orobus myrtifolius Alef. Marsh vetchling, marsh pea
Marsh pea is native to Europe, Asia, and North America. It has an affinity for wet freshwater areas. Identification: A vinelike plant 12-48" (30-121 cm) long, with stems that are often “winged.” That is, viewed in cross-section, the central circle of the stem has two flat projections emerging from opposite sides. Each projection is ¹/₁₆-⅛" (2-5 mm) wide. Some stems and even some entire plants lack these wings. Stems may also be angular or grooved. (Confused yet?) Branch tips have tendrils that latch onto other plants. Leaves are pinnate—composed of opposing pairs of leaflets. Leaflets often form the shape of a V, and may be asymmetrical. They are lance-shaped, about 1-2½" (2.5-6.3 cm) long and up to ½" (1.3 cm) wide, green on top, pale green below. Flowers are purple and white, about ¾" (1.9 cm) in size. They appear in clusters of 2-8, from June to August. Seedpods are 1-2½" (2.5-6.3 cm) long × ¼" (6.3 mm) around, similar to those of related garden peas, but smaller. Online References:
Lathyrus palustris at Illinois Wildflowers Lathyrus palustris at Minnesota Wildflowers Lathyrus palustris on Ontario Wildflowers Lathyrus palustris on eFloras Lathyrus palustris from the Jepson Manual References:
8/8/2010 · Jeff Smith Trail, Beaver Brook Association Conservation Lands, Rte. 130, Hollis, New Hampshire 8/8/2010 · Jeff Smith Trail, Beaver Brook Association Conservation Lands, Rte. 130, Hollis, New Hampshire 7/5/2015 · Jeff Smith Trail, Beaver Brook Conservation Area, Hollis, New Hampshire 7/5/2015 · Jeff Smith Trail, Beaver Brook Conservation Area, Hollis, New Hampshire 6/20/2016 · Wildlife Pond Trail, Beaver Broo, Hollis, New Hampshire 8/8/2010 · Jeff Smith Trail, Beaver Brook Association Conservation Lands, Rte. 130, Hollis, New Hampshire 6/20/2016 · Wildlife Pond Trail, Beaver Brook Conservation Area, Hollis, New Hampshire 8/2/2010 · Beaver Brook Association Conservation Lands, Rte. 130, Hollis, New Hampshire 7/2/2017 · Wildlife Pond, Beaver Brook Conservation Area, Hollis, New Hampshire Lathyrus palustris description by Thomas H. Kent, last updated 25 May 2020. © FloraFinder.org. All rights reserved. |
8/8/2010 · Jeff Smith Trail, Beaver Brook Association Conservation Lands, Rte. 130, Hollis, New Hampshire 7/5/2015 · Jeff Smith Trail, Beaver Brook Conservation Area, Hollis, New Hampshire 7/5/2015 · Jeff Smith Trail, Beaver Brook Conservation Area, Hollis, New Hampshire 6/20/2016 · Wildlife Pond Trail, Beaver Brook Conservation Area, Hollis, New Hampshire 8/8/2010 · Jeff Smith Trail, Beaver Brook Association Conservation Lands, Rte. 130, Hollis, New Hampshire 6/20/2016 · Wildlife Pond Trail, Beaver Broo, Hollis, New Hampshire 7/17/2012 · Beaver Brook Association Conservation Lands, Rte. 130, Wildlife Pond Trail, Hollis, New Hampshire 7/5/2015 · Jeff Smith Trail, Beaver Brook Conservation Area, Hollis, New Hampshire 7/5/2015 · Jeff Smith Trail, Beaver Brook Conservation Area, Hollis, New Hampshire Winged stem. (Flowers in this image are not marsh vetchling.) · 7/17/2012 · Beaver Brook Association Conservation Lands, Rte. 130, Wildlife Pond Trail, Hollis, New Hampshire 7/17/2012 · Beaver Brook Association Conservation Lands, Rte. 130, Wildlife Pond Trail, Hollis, New Hampshire 7/5/2015 · Jeff Smith Trail, Beaver Brook Conservation Area, Hollis, New Hampshire 8/2/2010 · Beaver Brook Association Conservation Lands, Rte. 130, Hollis, New Hampshire 7/2/2017 · Wildlife Pond, Beaver Brook Conservation Area, Hollis, New Hampshire Range:
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