What is a plant with round, white flowers, and part of the word is snow?

It's part of my homework.

What is a plant with round, white flowers, and part of the word is snow?
Snowdrop Bush (native shrub) Snowdrop Bush


Styrax officinalis var. redivivus (Styracaceae)http://www.calacademy.org/research/botan... There is also a snowberry which is a native honeysuckle http://en.wikipedia.org/wiki/Snowberry


and a little groundcover-called "Snow in Summer" http://www.naturehills.com/new/product/p...
Reply:Alyssum "mounds of snow" ?
Reply:It may be the "New Zealand Snow" plant.





Try a local University Botanic Garden supervisor.





I sincerely hope this helps.





PAMELA J.
Reply:It could be Cerastium tomentosum commonly called Snow-in-summer. Here's a photo:


http://www.botany.wisc.edu/garden/db/spe...
Reply:Hibiscus Fantasimus Snowhumoimun
Reply:possibly snowball or snowflake...
Reply:Snow on the Mountain.... euphorbia marginata





http://www.opsu.edu/UnivSchools/ScienceM...
Reply:If the flowers are on a shrub, it is an old-fashioned Snowball . These shrubs are actually a type of hydrangea.