FLORA OF VIETNAM Urticaceae Elatostema sp. Phu Tho Prov., Tan Son Distr., Xuan Son Municipality, Du village, around point 21°02’55, N 104 °56’5 l”E. Primary broad-leaved forest on very steep rocky slopes an cliffs of Svoi Lap remnant mountain composed with highly eroded solid marble-like limestone at elevation 500-600 m a.s.l. Terrestrial and lithophytic herb to 0.5 m tall о wet shady rocky slope. Locally very common. HAL 12722 17 February 2009 Coll.: L.Averyanov, P.K.Loc, N.T.Vinh, L.T.Son.