From the Star Trek Arboretum

Sea Holly (Eryngium x planum) 'Sapphire Blue''
A most alien specimen comes from the planet Andoria.  Sea Holly is a good choice for poor soil and a seaside location.  The Honey Bee is Terran.

The conical flower is surrounded by a corona of bracts which are modified leaves.  The flower's stems are also a rich, almost glowing blue color.

Crocosmia 'Lucifer'
From Vulcan comes Crocosmia, a most illogical flower.  When grown on Earth, it is a favorite of hummingbirds.

Shasta Daisy (Leucanthemum x superbum) 'Aglaia'
The poet-warriors of the Klingon home world Qo'noS have raised horticulture to an art form.  This Shasta Daisy hybrid shines in the dim light of the Klingon star.

The next time you host an event for Starfleet, consider floral arrangements combining these unusual flowering plants.