corolla

[kuh-rol-uh] /kəˈrɒl ə/
noun, Botany
1.
the inner envelope of floral leaves of a flower, usually of delicate texture and of some color other than green; the petals considered collectively.
Origin
1665-75; < Latin: little garland, equivalent to corōn(a) garland, corona + -la diminutive suffix; see -ule
Examples from the web for corolla
  • These flowers have no corolla, the group of petals that normally color flowers.
  • Describing a corolla that has a short tubular portion and widely spreading lobes so that the whole corolla is saucer-shaped.
  • The petals are fused into a two-lipped corolla with a slightly longer lower lip.
  • The corolla is strongly two-lipped with a lavender-blue to lavender-rose corolla tube and throat.
  • corolla is the collective term for petals of a flower taken as a group within the calyx.
British Dictionary definitions for corolla

corolla

/kəˈrɒlə/
noun
1.
the petals of a flower collectively, forming an inner floral envelope Compare calyx
Word Origin
C17 dim. of L corōna crown
Word Origin and History for corolla
n.

1670s, "crown," from Latin corolla, diminutive of corona "crown, garland" (see crown (n.)). Botanical use is from 1753.

corolla in Science
corolla
  (kə-rŏl'ə, kə-rō'lə)   
The petals of a flower considered as a group or unit. See more at flower.