Iris pseudacorus |
Iris germanica |
|
---|---|---|
yellow flag, yellow water iris |
bearded iris, garden iris, German iris |
|
Habit | Herbs to 150 cm tall. | Herbs to 120 cm tall. |
Roots | fleshy; rhizomes pink, freely branching, producing extensive clumps with remains of old leaves. |
fleshy; rhizomes homogeneous; many-branched. |
Stems | usually 1-branched. |
branched. |
Leaves | deciduous; stiff; erect at first then recurved; blades dark green with prominent median thickening, 20–30 mm wide; cauline leaves equal in height to inflorescence. |
unifacial; sword-shaped, 3.5 cm wide, forming an obvious fan. |
Inflorescences | 4–12-flowered; bracts subequal, green with brown margins; outer bract strongly keeled. |
1–3-flowered; bracts green, sometimes with a purple base. |
Flowers | perianth bright yellow or cream; signal a darker yellow basal patch delimited by short, brown lines; petals without veining; tube 12–13 mm; stigmas rounded with prominent tongue. |
perianth blue-violet, yellow, brown, or white with various patterns of color; sepals with beard along midrib of claw and lower part of limb; petals erect. |
Fruits | angled, with obvious groove at each angle. |
roundly 3-lobed. |
Seeds | D-shaped, flattened; corky, lustrous. |
red-brown, wrinkled. |
2n | =24, 30, 32, 34. |
|
Iris pseudacorus |
Iris germanica |
|
Distribution | ||
Discussion | Swamps, wet shores of rivers and lakes, irrigation ditches. Flowering May–Jun. 0–1000 m. BW, CR, Est, Lava, WV. CA, ID, NV, WA; throughout North America; northern Africa, Eurasia. Exotic. A native to Eurasia and Africa, this taxon is considered invasive in Oregon. |
Persisting after cultivation near old homesteads. Flowering Apr–May. 100–200 m. ECas, WV. CA, WA; throughout North America; Europe. Exotic. Iris germanica is presumably a cultivar resulting from hybridization between I. pallida and I. variegata. Some populations may also contain genetic material from other species, in which case other proposed names may be more appropriate (i.e., I. × conglomerata). The genetic makeup of Oregon plants is currently unknown. |
Source | Flora of Oregon, volume 1, page 261 Ann Willyard |
Flora of Oregon, volume 1, page 261 Ann Willyard |
Sibling taxa | ||
Web links |
|
|