Both Uses

allude
in
Rappaccini's Daughter
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"You are a connoisseur in flowers, signor," said Beatrice, with a smile, alluding to the bouquet which he had flung her from the window.†
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alluding = making an indirect reference
The tone in which the professor alluded to the pure and lovely daughter of Rappaccini was a torture to his soul; and yet the intimation of a view of her character opposite to his own, gave instantaneous distinctness to a thousand dim suspicions, which now grinned at him like so many demons.†

alluded = indirectly referenced

Definitions:

(1) (allude)
to make an indirect reference

The expression, no allusion can mean "not even an indirect reference"; i.e., neither a direct nor an indirect reference to something.
(2) (meaning too rare to warrant focus)