The selected species belongs to the ....

1. "Trifolium pratense" type

Main (tap) root of the primary root system without adventitious roots and buds. Senescing tap root decays from root centre causing plant fragmentation. Old genets disintegrate into ramets bearing parts of the main root and one or a few shoots. Vegetative spreading is poor. The tap root serves as storage organ and vascular link between shoots. Bud bank is on perennial bases of shoots (caudex)

[other examples: Artemisia campestris, Cichorium intybus, Dorycnium herbaceum].