Sporobolus alterniflorus aka Smooth Cordgrass

Sporobolus alterniflorus is a grass in the Poaceae family. It is perennial, which means it lives for years. Garden sources also use the name Spartina alterniflora. They call it smooth cord grass too. Its native range runs from east Canada to east Mexico. It also spans the Lesser Antilles to Argentina. Kew puts it in a temperate climate group. The RHS lists it as non-native to Britain and Ireland.

Kew calls its life form perennial or a rhizomatous geophyte. The latter means it can have stems below ground, called rhizomes. The supplied species records give no height or width at full growth. They do not describe its stems, leaves, flowers, or fruit. The RHS gives some such traits for the genus Spartina. These genus traits cannot show the exact form of this species. The supplied evidence gives no dates when this species blooms.

Smooth cord grass has a clear role in coastal planting. The University of Florida names it for use on living shorelines. One example shows a planting at Cedar Key, Florida. Living shorelines use plants to help protect the shore. They may also use oyster reefs or other structures. They offer a choice besides seawalls and bulkheads. They aim to slow soil loss and keep coastal habitat. The guide lists this grass as one choice to plant. It does not say the grass suits every shore.

Site traits shape how people choose and plan living shorelines. The Florida guide calls for checks of water depth and salt levels. Wave strength, currents, slope, and the range of tides matter too. Nearby structures and the rate of soil loss also need checks. These checks guide a whole project, not just this grass’s care. The supplied evidence sets no firm needs for light, soil, or water. It gives no frost limits or hardiness zones either.

Planting along coasts thus has the most support as a landscape use. The sources discuss wider gains from living shorelines. These include habitat and cleaner water. They do not measure this grass’s own share of those gains. No supplied species account names pests, diseases, or other garden problems. None states whether people can eat any part of it. The evidence gives no finding on toxicity to people or pets. These gaps do not prove that the grass is safe.