Glyceria (striata)

Lee Riley Horticulturist USDA FS - Dorena Genetic Resource Center 34963 Shoreview Road Cottage Grove, Oregon 97424 541-915-7324 541-767-5709 (fax) lee.riley@usda.gov

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Family Scientific Name:	Poaceae
Family Common Name:	Grass
Scientific Name:	Glyceria striata
Common Synonym:	Glyceria elata
Common Name:	Mannagrass
Species Code:	GLST
Ecotype:	Umpqua National Forest, Oregon; Mt Baker-Snoqualmie National Forest, Washington
General Distribution:	Widespread across North America. Common to moist habitat, including forests.
Propagation Goal:	Plants
Propagation Method:	Seed
ProductType:	Container (plug)
Stock Type:	107 ml (6.5 in3) container
Time To Grow:	8 weeks
Target Specifications:	Stock Type: Container seedling Well developed crowns, firm plug in container.
Propagule Collection:	Seed ripens in July or August and retention within the flower head is fair to good. Collections can be readily made along wet forest road ditches, but access can be difficult along streams or in denser, swampy brush where this species is commonly found.
Propagule Processing:	Seed hulls readily detach but removal is unnecessary
Pre-Planting Treatments:	Due to small seed size and short growing season, seeds are mixed with sand and sown directly into target containers. Growing medium used in these cells consists of 40:20:20:20 peat:composted fir bark:perlite:pumice with Nutricote controlled release fertilizer (18N:6P2O5:8K2O with minors; 140-d release rate at 21C) at the rate of 0.5 gram Nutricote per 107 ml container. Entire racks are sealed inside plastic bags and placed into refrigeration at 1 to 3 °C for 30 days. Cells are checked weekly and kept moist throughout the stratification period.
Growing Area Preparation/ Annual Practices for Perennial Crops:	Greenhouse growing facility. Racks are removed from stratification facilities and placed directly into greenhouses in mid-July. No additional time-release fertilizer is added to medium. Cells are irrigated lightly several times per day to ensure seeds are kept quite moist throughout the germination period.
Establishment Phase:	Germination is uniform and is usually complete in 1 to 2 weeks. Following germination, plants are fertilized with soluble 12-2-14-6Ca-3Mg at 100 ppm for 1 week.
Length of Establishment Phase:	2 weeks
Active Growth Phase:	Plants grow quickly during the active growth phase Soluble fertilizer 20-9-20 NPK at 150 ppm is applied weekly for 8 weeks.
Length of Active Growth Phase:	8 weeks
Hardening Phase:	No dry-down is done to induce dormancy. Seedlings are moved to an outdoor growing area in mid-September.
Length of Hardening Phase:	2 to 3 weeks
Harvesting, Storage and Shipping:	Harvest Date: Mid-October Storage Conditions: Seedlings are usually outplanted in fall. No storage except in outdoor growing area. Plants are well irrigated prior to shipping and shipped in containers.
Other Comments:	Wetland classification: OBL Fowl mannagrass is a rapidly establishing native species suitable for restoration of swamps, the edges of marshes, ponds, and streams, and other wetland plant communities where an herbaceous understory is desired. It has versatility for use along creeks and ditch bottoms where exposure may vary from full sun to dense shade, thereby improving soil stability beyond the use of woody plants alone. Where this species dominates, herbage production is high Fowl mannagrass can be easily confused with reed mannagrass (Glyceria grandis), which has smoother leaves and lacks its slightly rough texture.
References:	Bartow, A. 2015. Propagation protocol for production of Container (plug) Glyceria striata plants USDA NRCS - Corvallis Plant Materials Center Corvallis, Oregon. In: Native Plant Network. US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources. URL: https://npn.rngr.net/renderNPNProtocolDetails?selectedProtocolIds=-glyceria-4037 (accessed 6 Oct 2018). Darris, D. 2005. Plant fact sheet for fowl mannagrass (Glyceria striata). Corvallis (OR): USDA Natural Resources Conservation Service, Plant Materials Center. URL: https://plants.usda.gov/factsheet/pdf/fs_glst.pdf (accessed 6 Oct 2018). Dorena Genetic Resource Center Propagation Records, unpublished.

Citation:

Riley, Lee E.; Klocke, Allison. 2018. Propagation protocol for production of Container (plug) Glyceria striata Plants 107 ml (6.5 in3) container; USDA FS - Dorena Genetic Resource Center Cottage Grove, Oregon. In: Native Plant Network. URL: https://NativePlantNetwork.org (accessed 2025/04/21). US Department of Agriculture, Forest Service, National Center for Reforestation, Nurseries, and Genetic Resources.