Switchgrass Variety Spissum: A Lesser-Known Native Grass
If you’ve been exploring native grasses for your landscape, you might have stumbled across Panicum virgatum var. spissum, a particular variety of the beloved switchgrass. While switchgrass as a species is well-known among native plant enthusiasts, this specific variety is a bit more mysterious – and that’s exactly what makes it intriguing for the curious gardener.
What is Switchgrass Variety Spissum?
Panicum virgatum var. spissum is a perennial native grass that belongs to the larger switchgrass family. Like its relatives, it’s a graminoid – that’s just a fancy way of saying it’s a grass or grass-like plant. This variety is native to both Canada and the lower 48 states, making it a true North American native.
Where Does It Grow?
This particular variety of switchgrass has been documented in the northeastern regions of North America. You’ll find it naturally occurring in Nova Scotia, Quebec, Connecticut, Maine, Maryland, Massachusetts, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, and Vermont. This distribution suggests it’s well-adapted to the climate conditions of the Northeast and Maritime Canada.
The Mystery Factor
Here’s where things get interesting – and a bit challenging. While the broader switchgrass species (Panicum virgatum) is extensively studied and widely available, specific information about variety spissum is surprisingly scarce. This could mean a few things:
- It may be a less distinct variety that’s often grouped with other switchgrass forms
- It could be an older taxonomic designation that’s not commonly used anymore
- It might be regionally specific and less commercially available
Should You Plant It?
As a native species, this switchgrass variety would theoretically be an excellent choice for supporting local ecosystems. Native grasses like switchgrass are typically fantastic for:
- Providing habitat for native wildlife
- Supporting soil health and preventing erosion
- Adding natural movement and texture to landscapes
- Requiring less water and maintenance once established
However, the limited specific information about variety spissum presents a practical challenge. Without detailed knowledge of its specific growing requirements, mature size, or unique characteristics, it’s difficult to plan for its use in your garden.
A Practical Alternative
If you’re drawn to the idea of this northeastern native grass, consider looking into the broader Panicum virgatum species instead. Regular switchgrass is readily available, well-documented, and offers all the benefits you’d expect from a native grass. You’ll find plenty of cultivars and varieties that are specifically bred for garden use, with known characteristics for height, color, and growing conditions.
Many nurseries specializing in native plants can help you select a switchgrass variety that’s specifically suited to your local conditions and garden goals. This way, you’ll get the native plant benefits you’re looking for with the confidence that comes from choosing a well-understood plant.
The Bottom Line
While Panicum virgatum var. spissum represents the fascinating diversity within our native plant communities, the lack of specific growing information makes it a challenging choice for most gardeners. Sometimes the most responsible approach is to choose related native plants that are better understood and more readily available. Your local native plant society or extension office might have more regional knowledge about this particular variety if you’re determined to learn more.
Remember, every native plant in your garden is a step toward supporting local wildlife and creating more sustainable landscapes – whether it’s a mysterious variety like spissum or a well-known switchgrass cultivar from your local nursery.
