One Haikuchen by Basho, Jr. ("The Linguist") & Two Runcibl'd Spooners by Uly Poe

A...E...I...O...U;
sometimes Y and sometimes not:
Vowels! (No consonants.)

Plath's roman. ('Tain't Mother Goose.)
The Bell Jar
     Counter Plath selects for mousse.
Gel bar
     Moral:
Get sticky or get sicky!

Lepidoptera and kin:
caterpillar.
     Who a comic's chat does in:
patter killer.
     Moral:
This is gold, Jerry. Gold!