Rootstock a depressed-globose corm rooting from below, those of past seasons often not resorbed, basal in origin, tunics coarsely fibrous, often accumulating in a dense mass
Stem aerial, terete, thin and wiry, usually with several branches, often drooping above, sometimes erect, subtending bracts dry and thread-like
Leaves several, lower 2 or 3 cataphylls, these often dry and becoming fibrous; foliage leaves unifacial, often without a definite midrib in mature plants, plane, linear, coriaceous and fibrotic
Inflorescence a spike, axes wiry, usually drooping, occasionally erect; bracts dry, usually papery and translucent, occasionally solid, becoming lacerate above and usually brown-streaked or flecked, sometimes caudate, inner bracts smaller than outer and forked apically
Flowers actinomorphic and campanulate, usually nodding, often shades of pink to mauve, also red, purple, yellow or white, usually with small markings near tepal bases, unscented, with nectar from septal nectaries; perianth tube funnel-shaped, fairly short
Tepals subequal, cupped and often enclosing stamens and often style
Stamens symmetrically disposed and central; filaments arising in throat; anthers exserted from tube, sometimes barely so; pollen monosulcate, operculate, exine perforate
Style exserted from tube, seldom from perianth, branches short, slender, slightly expanded above and recurved
Capsules globose, cartilaginous
Seeds globose or lightly angled, flattened at chalazal end, smooth, hard, often shiny, surface laevigate, raphal vascular trace excluded
x = 10
Classification Notes:
Dierama is recognised by the wiry, usually drooping spikes, pendent regular flowers and dry, either solid or scarious floral bracts, generally pale with brown streaks and veins
The genus is closely allied to the southern Africa Ixia, restricted to the winter-rainfall region
Nomenclature:
Dierama K.Koch
Koch: 10 (1855)~(Page number suspect - No access to the publication)
Hilliard, Burtt & Batten: 41 (1991)
Distribution & Notes:
Global: Species 44, mostly in the summer-rainfall region in grassland, extending from Knysna (Western Cape, southern Africa) to Ethiopia
Southern Africa: Centred in eastern southern Africa, and there both coastal and montane
Additional Notes:
The flowers are pollinated by bees
References:
HILLIARD, O.M., BURTT, B.L. & BATTEN, A. 1991. Dierama, hairbells of Africa. Acorn Press, Johannesburg
KOCH, K.H.E. 1855. In Index Seminum Hortus Berolinensis 1854, Appendix 10
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