The Collaborative International Dictionary
Lappaceous
Lappaceous \Lap*pa"ceous\ (l[a^]p*p[=a]"sh[u^]s), a. [L. lappaceus burlike, fr. lappa a bur.] (Bot.) Resembling the capitulum of burdock; covered with forked points.
Wiktionary
lappaceous
a. (context botany English) Resembling the capitulum of burdock; covered with forked points.