Narrowed plumbing lets flower survive summer cold snaps
Tiny pores, skinny pipes prevent ice from reaching alpine heather’s flowers
![heather](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2016/09/092216_lh_alpine-heather_main_free.jpg?fit=860%2C460&ssl=1)
CHILL OUT Scotch heather weathers summer freezes by forming internal ice barriers that block ice crystals from spreading to its flowers.
Peter O'Connor aka anemoneprojectors/Flickr (CC BY-SA 2.0)