Today we have yet another introduced species in the family
Fabaceae (legume family), this time introduced not as a fodder crop or an ornamental, but for ecosystem management:
Securigera varia (aka
Coronilla varia, crownvetch) has been introduced to North America primarily as an erosion control plant [
1,
2,
3,
4,
5,
6].
Securigera varia is suitable for this purpose because it spreads rapidly (both through seeding and through vegetative propagation by root spreading) and forms a dense root system [
1,
2,
3,
5]. Like many members of the
Fabaceae,
Securigera varia is a nitrogen-fixing plant [
2,
4,
5,
6].
|
Securigera varia inflorescence |
Since its introduction to North America in the 1950s,
Securigera varia has spread across much of the continent (US range map
here, Canada range map
here). Unfortunately, those traits which make
Securigera varia a suitable erosion control plant can also make it a problematic invasive plant [
1,
2,
3,
5,
6]. This plant will tend to squeeze out other plants, disrupting ecosystem functioning [
1,
2,
3,
4,
5,
6].
Securigera varia foliage resembles that of Vicia cracca (cow vetch):
|
Securigera varia foliage |
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