A corymb may have a paniculate branching structure, with the lower flowers having longer pedicels than the upper, thus giving a flattish top superficially resembling an umbel. Many species in the subfamily Amygdaloideae, such as hawthorns and rowans, produce their flowers in corymbs.
Hickey, M.; King, C. (2001). The Cambridge Illustrated Glossary of Botanical Terms. Cambridge University Press. p. 30. ISBN 978-0521790802. A much-branched inflorescence. (softcover ISBN 978-0521794015). 978-0521790802 ↩
Technically, the inflorescence unit in a grass is the spikelet, but the arrangement of spikelets may be described as a panicle. ↩
"In the form of a panicle"[1] ↩