imilar state of things prevailed in classical antiquity:

Who are these coming to the sacrifice?
To what green altar, O mysterious priest,
Lead'st thou that heifer lowing at the skies,
And all her silken flanks with garlands drest?

And,

Fairer than these, though temple thou hast none,
Nor altar decked with flowers,
Nor virgin choir to make delicious moan
Upon the midnight hours.

M. Fustel de Coulanges describes the custom of wearing crowns
or garlands of flowers in ancient Rome and Greece as follows: "It
is clear that the communal feasts were religious ceremonies. Each
guest had a crown on the head; it was an ancient custom to crown
oneself with leaves or flowers for any solemn religious act." "The
more a man is adorned with flowers," they said, "the more pleasing
he is to the gods; but they turn away from him who wears no crown at
his sacrifice." And again, 'A crown is the auspicious herald which
announces a prayer to the gods.' [164]

Among the Persians the flowers themselves are worshipped: [165] "When
a pure Iranian sauntered through (the Victoria Gardens in Bombay)
... he would stand awhile and meditate over every flower in his path,
and always as in a vision; and when at last the vision was fulfilled,
and the ideal flower found, he would spread his mat or carpet before
it, and sit before it to the going down of the sun, when he would arise
and pray before it, and then refold his mat or carpet and go home; and
the next night, and night after night, until that bright particular
flower faded away, he would return to it, bringing his friends with
him in ever-increasing numbers, and sit and sing and play the guitar or
lute before it--and anon they all would arise together and pray before
it; and after prayers, still sit on, sipping sherbet and talking the
most hilarious and shocking scandal, late into the moonlight."

4. Custom of wearing garlands

From the custom of placing garlands on the gods as a mark of honour
has no doubt arisen that of garlanding guests. This is not confined
to India but obtained in Rome and probably in other countries. The
word 'chaplet' [166] originally meant a garland or wreath to be worn
on the head; and a garland of leaves with four flowers at equal
distances. Dryden says, 'With chaplets green upon their foreheads
placed.' The word _mala_ originally meant a garland, and subsequently
a rosary or string of beads. From this