adjhastate(of a leaf shape) like a spear point, with flaring pointed lobes at the base
Webster's Revised Unabridged Dictionary
aHastateShaped like the head of a halberd; triangular, with the basal angles or lobes spreading; as, a hastate leaf.
Century Dictionary and Cyclopedia
hastateFurnished with a sharp point or head for thrusting or cutting: said of a weapon, such as the spear, pike, partizan, or battle-ax.
hastateShaped like the head of a spear; specifically, in botany, triangular nearly down to the base, and then abruptly widened into two lateral lobes at right angles to the principal axis: said chiefly of leaves. Polygonum arifolium, the tear-thumb, Atriplex patula, the orache, and Rumex Acetosella, the sheep-sorrel, furnish typical examples.