APPW key feature pages

Aroid or aster?

Aroids are members of the monocot family Araceae and have a specialized inflorescenceinflorescence:
(n) the arrangement of flowers on the floral axis
comprising spadixspadix:
(n) a spike of small flowers borne on a thick, fleshy axis
subtended and often enclosed by a spathespathe:
(n) a large bract or bracts subtending and often enclosing an inflorescence
. The spadixspadix:
(n) a spike of small flowers borne on a thick, fleshy axis
has numerous minute flowers, which are sometimes poorly differentiated from each other, with male and female flower separated into zones. Asters are members of the dicot family Asteraceae (sometimes referred to as Compositae). This species-rich family has a highly specialized inflorescenceinflorescence:
(n) the arrangement of flowers on the floral axis
organized into a headhead:
(n) inflorescence consisting of small closely packed stalkless flowers or florets arising at the same level on a flattened axis; of several types, including: discoid (composed entirely of disk flowers) and radiate (composed of central disk flowers and marginal ray flowers)
comprising a disk like arrangement of small flowers. Both groups of plants have specificspecific:
(adj) pertaining to a species
terminology associated with unique floral structures.

aroid spadix and spathe
an aroid (family Araceae) - Cyrtosperma merkusii
Asteraceae flower head parts
an aster (family Asteraceae = Compositae) - Sphagneticola trilobata

neither

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