I tried a couple of apps on my phone, but I could not identify this flower and plant species. These are at the Allen Gardens Conservatory, at the beginning of Spring in Toronto.
This is a Schizanthus "orchid" (actually not a real orchid) called Schizanthus pinnatus ("butterfly orchid" or "poor man's orchid").
It is native to Chile but the plants are also cultivated as ornamentals. It is commonly known as the "small butterfly" ("mariposita") or "small, white butterfly" ("mariposita blanca").
Annual plant of 20-50 cm in height
Leaves: 2.5-3 cm long; pinnatisect (divided into 6-8 pairs in oblong-linear segments, entire or separated).
Flowers: white, pink or violet, 2-3 cm diameter, arranged in panniculate inflorescences, sometimes dichotomous.