Where does “unipetalous” come from?

unipetalous (English) comes from English petalous, from English -ous, from Middle English -ous, from Old French -us, from Latin -ōsus, from Old Latin -ōssus.

unipetalous (English): Having a single petal

Definitions

Having a single petal

Ancestry of “unipetalous”, step by step

unipetalous traces back through two separate lines of ancestry.

via English petalous

Step	Language	Word	Meaning
1	English	petalous	Having petals
2	English	-ous	Used to form adjectives from nouns, to denote...
3	Middle English	-ous	—
4	Old French	-us	-ous, used for forming adjectives
5	Latin	-ōsus	ose, -ous, -ful (full of or overly prone to)
6	Old Latin	-ōssus	—

via English uni

Step	Language	Word	Meaning
1	English	uni	University; Sea urchin eaten as sushi
2	Japanese	雲丹	the food made from the roe of sea urchin,...

Every word from Old Latin -ōssus →Every word from Latin -ōsus →Every word from English -ous →