▁not ▁project ing ▁beyond ▁the ▁tips ▁of ▁the ▁gl umes . ▁It ▁has ▁been ▁known ▁to ▁hy brid ize ▁with ▁H . ▁m oll is , ▁producing ▁a ▁male ▁ster ile ▁hy brid ▁with ▁ 2 n ▁= ▁ 2 1 ▁chrom os om es . ▁Hy br ids ▁tend ▁to ▁res emble ▁H . ▁lan atus ▁in ▁their ▁morph ology . ▁ ▁It ▁spread s ▁veget atively ▁by ▁developing ▁new ▁sho ots ▁and ▁roots ▁at ▁its ▁nodes . ▁Pl ants ▁form ▁a ▁blank et ▁of ▁run ners ▁on ▁the ▁soil ▁surface . ▁Sem i - pro str ate ▁ro set tes ▁of ▁sho ots ▁called ▁' m ops ' ▁may ▁form ▁at ▁the ▁end ▁of ▁the ▁run ners . ▁These ▁m ops ▁root ▁readily ▁in ▁contact ▁with ▁mo ist ▁soil . ▁ ▁In vas ive ▁species ▁and ▁habitat ▁prefer ences ▁ ▁In ▁a ▁European ▁survey ▁of ▁we ed ▁cont am ination ▁in ▁c ere al ▁seed ▁in ▁ 1 9 7 0 , ▁Hol cus ▁lan atus ▁seed ▁was ▁found ▁in ▁ 1 % ▁of ▁samples . ▁H . ▁lan atus ▁is ▁an ▁indicator ▁of ▁poor ▁soil , ▁low ▁gra zing ▁levels , ▁and ▁poor ▁d rain age . ▁It ▁is ▁toler ant ▁of ▁a ▁range ▁of ▁soil ▁p H , ▁but ▁grows ▁best ▁between ▁ 5 . 0 ▁and ▁ 7 . 5 . ▁It ▁exhib its ▁clim atic ▁toler ance ▁over ▁a ▁wide ▁alt itude ▁range , ▁but ▁severe ▁fro st s ▁can ▁kill ▁it . ▁It ▁does ▁not ▁surv