the.com/sunrose

means A common name for the helianthemum, a low, sun-loving flowering shrub whose blooms open wide in daylight and often drop their petals by evening.

from A straightforward compound of 'sun' and 'rose,' built in English to describe a rose-like flower devoted to sunlight — it's also a folk-rendering of the genus name Helianthemum, from Greek 'helios' (sun) and 'anthemon' (flower), which botanists shortened in common speech to something gardeners could actually say.