English plurals. English nouns are inflected for grammatical number, meaning that if they are of the countable type, they generally have different forms for singular and plural.
Growing Daylilies. We'd describe the Daylily as the backbone of the perennial garden except that would do a disservice to this most durable plant -- backbones, as every gardener knows, are fragile things, whereas Daylilies are close to indestructible.
And there are researches about the selection of new varieties of edible lilies from the horticultural cultivars, such as 'Batistero' and 'California' among 15 lilies in Beijing, and 'Prato' and 'Small foreigners' among 13 lilies in Ningbo.