I noticed in 1861 exactly the same fact with Trifoliumpratense.
2
I have seen whole fields of red clover ( Trifoliumpratense) in the same state.
3
H. Muller, "Fertilisation of Flowers," page 186, describes hive-bees visiting Trifoliumpratense for the sake of the pollen.
4
The use of the highly mycorrhizal species Trifoliumpratense as a companion plant impacted positively on mycorrhizal colonization of A. umbelliformis under greenhouse conditions.
5
Diving hap-hazard into his book, Thorny demanded a " trifoliumpratense."