Inula


Inula is a genus of about 80 species of flowering plants in the family Asteraceae, native to Europe, Asia and Africa.
They may be annuals, herbaceous perennials or subshrubs that vary greatly in size, from small species a few centimeters tall to enormous perennials over tall. They carry yellow daisy-like composite flowerheads often with narrow ray-florets.
Some common characteristics include pappus with bristles, flat capitulum, and lack of chaff.
Several species are popular flowers for the garden, with cultivation going back to antiquity. The smaller species are used in rock gardens and the more common larger ones, which tend to have very coarse foliage, in borders.

Etymology

The genus name Inula is of uncertain origin, and was already in use by the Romans. The Latin phrase inula campana gave rise to the English whose scientific name is Inula helenium. The plant's specific name, helenium, derives from Helen of Troy; elecampane is said to have sprung up from where her tears fell.

Species

The following species are recognised in the genus Inula:

Select species formerly in ''Inula''

Inula auriculata Boiss. & Balansa => Pentanema auriculatum D.Gut.Larr. et al.Inula britannica L. => Pentanema britannica D.Gut.Larr.et al. – British yellowheadInula conyzae Meikle => Pentanema squarrosum D.Gut.Larr.et al. – ploughman's-spikenardInula crithmoides L. => Limbarda crithmoides Dumort. – golden samphireInula dysenterica L. => Pulicaria dysenterica Bernh.Inula graminifolia Michx. => Pityopsis graminifolia Nutt.Inula graveolens Desf. => Dittrichia graveolens Greuter – stinkwort, stinkweedInula hirta L. => Pentanema hirtum D.Gut.Larr. et al.Inula indica L. => Pentanema indicum Y.LingInula mariana L. => Chrysopsis mariana ElliottInula orientalis Lam. => Pentanema orientale D.Gut.Larr.et al.Inula primulifolia Lam. => Conyza primulifolia Cuatrec. & LourteigInula salicina L. => Pentanema salicinum D.Gut.Larr.et al. – Irish fleabane, willowleaf yellowheadInula spiraeifolia L. => Pentanema spiraeifolium D.Gut.Larr.et al.Inula subaxillaris Lam. => Heterotheca subaxillaris Britton & RusbyInula viscosa => Dittrichia viscosa – false yellowhead, sticky fleabane, woody fleabane

Ecology

Inula species are used as food plants by the larvae of some Lepidoptera species including case-bearers of the genus Coleophora, such as C. conyzae, C. follicularis, C. inulae, and C. troglodytella.