Bulbous and Tuberous Rooted Plants
A division of the Camden Park catalogues that is not clearly defined. Some of the more important families of the Hortus are included here, Amaryllidaceae, Iridaceae and Liliaceae. It also contains a wide assortment of other plants with a modified stem or root that acts as a storage organ. Such plants are usually deciduous and have a distinct dormancy period. Shrubs and trees are not included, but there is some overlap with herbaceous plants.
Iris spuria L. subsp. halophila (Pall.) B.Mathew & Wendelbo.
A very vigorous and hardy, free-flowering rhizomatour iris with white, dingy white-yellow or grey-purple flowers, sometimes golden yellow. [RHSD, BIS, Lynch].
Iris spuria L. subsp. notha (Bieb.) Asch. & Grabn.
See Iris spuria L. ssp. spuria for a description of the type species. The flower spikes of notha bear up to 5, violet-blue blooms with yellow-striped falls. [RHSD, Hortus].
Iris spuria L. subsp. spuria
Fully-hardy, robust, very variable, rhizomatous iris with tough, broad leaves and branched stems bearing several blue, yellow or white flowers in summer. To 90cm. [RHSE, Hortus, Lynch].
Iris subbiflora Brot.
A hardy, evergreen rhizomatous iris with leaves to 30cm long and 2.5cm wide. The flowers are violet, coarsely veined brown and purple, with bluish beards, shading to dull yellow. [RHSD, Hortus, BIS].
Iris susiana L.
Frost-hardy, rhizomatous, bearded iris with stems bearing solitary grey and purple flowers in spring. To 40cm. [RHSE, Hortus].
Iris variegata L.
Fully-hardy, rhizomatous bearded iris with branched stems bearing 3-6 pale yellow flowers with brown or violet veins in mid-summer. To 45cm. [RHSE, Hortus].
Iris versicolor L.
Rhizomatous Iris with somewhat glaucous leaves and terminal clusters of claret-purple flowers. To 60cm. [RHSD, Hortus].
Iris vulgaris Pohl
Iris vulgaris is now recognized as a form of Iris germanica L. which see. According to Dykes in England the commonest, or ‘vulgar’, form of Iris germanica has blue-purple standards and falls of a slightly redder shade. Iris germanica is somewhat variable and the form grown by Macarthur as Iris vulgaris was probably recognisably different to the plant he grew as Iris germanica. For this reason they have been treated separately in the Hortus.
Iris x lurida Ait.
Iris lurida is a confused name. Iris x lurida Ait. is probably a hybrid between Iris variegata L. and Iris pallida Lam., a variety of I. germanica. These species cross freely where their ranges coincide. It was figured by Redouté at the end of the 18th century and is sometimes called Iris redoutiana Spach. It is variable, but intermediate between the parents, with maroon to purple-brown flowers with yellow beards, spring flowering, often with an autumn flush. [RHSD, Hortus].
Iris xiphium Desf. var. lusitanica (Ker-Gawl.) Franco
For a description of the type species see Iris xiphium Desf. Lusitanica is no more than a colour form of the very variable Iris xiphium differing from the type by having almost entirely yellow falls, rather than blue with a central yellow mark.
Iris xiphium L.
A vigorous, hardy, bulbous iris with lance-shaped leaves and pale to deep blue or violet, occasionally yellow or white, flowers in spring or summer. To 60cm. [RHSE, Hortus].
Ismene amancaes (Ruiz & Pav.) Herb.
Bulbous perennial, the strap-like basal leaves fused at the base to form a false stem which produces a loose umbel of 2-6 scented, deep yellow flowers in summer. To 30cm. [RHSE, Baker Am.].
