Formal:
* A volume of poetry: This is the most common and straightforward option.
* A collection of poems: This is another formal and widely accepted term.
More poetic:
* A garland of poems: This evokes a sense of beauty and artistry.
* A tapestry of verses: This suggests a richness and complexity of language and imagery.
* A chorus of voices: This highlights the diverse perspectives and styles found in poetry.
Informal:
* A bunch of poems: This is a simple and casual option.
* A pile of poetry: This is playful and suggests a large quantity of poems.
Ultimately, the best collective noun for poetry will depend on your specific needs and the tone you want to convey.