(Of a leaf) having a narrow triangular shape like that of a spearhead.The leaflets are ovate to lanceolate, sometimes hastate, and are subtended by inconspicuous stipels....
Slender vine with hastate leaves [are] found in very specific scrub habitats on white sticky clay.
We suggest that depth mostly to get adequate light to the seedlings with just hastate leaves.
Origin
Late 18th century: from Latin hastatus, from hasta 'spear'.