Assertion: ornamental onion | /r/CapableOf | produce spherical umbels
Facets:
Source sentences:
text: These ornamental onions produce spherical umbels on single stalks in spring and summer, in a wide variety of sizes and colours, ranging from white (Allium 'Mont Blanc'), blue (A. caeruleum), to yellow (A. flavum) and purple (A. giganteum).