The Collaborative International Dictionary
Oblanceolate
Oblanceolate \Ob*lan"ce*o*late\, a. [Pref. ob- + lanceolate.] Lanceolate in the reversed order, that is, narrowing toward the point of attachment more than toward the apex.
Wiktionary
oblanceolate
a. (context botany of leaves English) Of a reversed lanceolate shape: attached to the stem by the pointed end, with the other end rounded.
WordNet
oblanceolate
adj. of a leaf shape; having a broad rounded apex and a tapering base