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Dietes bicolor

(Evergreen Iris)

Overview

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Low herbaceous ornamental from Africa with the sword-like leaves in one plane . The showy flowers are yellow with three brownish spots at the base .

Common Names

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Common Names in English:

African Iris, Bicolor Iris, Evergreen Iris, Peacock Flower, Spanish Iris

Description

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Family Iridaceae

Herbs perennial (or shrubs or annuals ), with rhizomes, bulbs, or corms. Leaves alternate, often 2-ranked, often oriented edgewise to aerial stem, usually sword-shaped to linear , parallel veined, base sheathing . Inflorescence sometimes a spike or reduced to a solitary flower, more often of monochasial , umbellate cymes, each enclosed in 2 opposed bracts (spathes ) and termed a rhipidium, which may be solitary and terminal or numerous and variously arranged in racemes or panicles; bracts 1 to several. Flowers bisexual , showy, usually actinomorphic (often zygomorphic elsewhere) . Perianth segments 6, in 2 whorls, inner and outer ones equal or differing in size and/or color; tube filiform or trumpet-shaped. Stamens (2 or) 3; anthers extrorse . Ovary inferior (or superior), 3-loculed; ovules few to many; placentation axile . Style with filiform, slender, or petaloid branches. Fruit a loculicidal capsule. Seeds with or without aril and wings.

Between 70 and 80 genera and ca. 1800 species: nearly worldwide, especially S Africa, Asia, and Europe; three genera and 61 species (21 endemic, one introduced ) in China.[1]

Physical Description

Habit: Evergreen .

Flowers: Bloom Period: March, April, May. • Flower Color: near white, pale yellow, white

Size/Age/Growth

Size: 18-24" tall.

Biology

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Growth

Culture: Space 18-24" apart.

Soil: Minimum pH: 5.6 • Maximum pH: 7.8

Sunlight: Sun Exposure: Sun to Partial Shade.

Moisture: Drought Tolerance: High

Temperature: Cold Hardiness: 8a, 8b, 9a, 9b. (map)

Taxonomy

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Notes

Publishing author : Sweet ex G.Don

Publication : in Loud. Hort. Brit . Suppl. i. 587

An accepted name in the RHS Horticultural Database.

Similar Species

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Members of the genus Dietes

ZipcodeZoo has pages for 17 species, subspecies, varieties, forms, and cultivars in this genus:

D. bicolor (Evergreen Iris) · D. butcheriana (Wide-Leafed Dietes) · D. catenulata · D. compressa · D. flavida (Butterfly Iris) · D. grandiflora (Butterfly Iris) · D. huttoni · D. huttonii · D. iridifolia · D. iridioides (Fortnight Lily) · D. iridioides 'Amatola' · D. iridioides 'Johnsonii' · D. iridioides 'Tiny Dancer' · D. irioides · D. prolongata · D. robinsoniana (Wedding Lily) · D. vegeta

More Info

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Further Reading

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Notes

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Contributors

Identifiers

Footnotes

  1. Yu-tang Zhao, Henry J. Noltie & Brian F. Mathew "Iridaceae". in Flora of China Vol. 24 Page 297. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]
Last Revised: 7/3/2009