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Clackamas iris

Habit Herbs to 30 cm tall.
Roots

few or none;

rhizomes heterogeneous, 2 mm, expanding to 10–15 mm; on surface or very shallow.

Stems

unbranched or 1-branched.

Leaves

basal leaves scarious, pale green, approximately 15 mm wide;

cauline leaves 1–2; thin, clasping basally then spread.

Inflorescences

2–3-branched; each with 1 flower borne at approximately the same level;

bracts unequal.

Flowers

perianth white or blue with deep violet lines; signal an inconspicuous crest of pale yellow ridges on the spreading sepals;

floral tube funnel-shaped;

style crests rounded;

stigmas longtriangular with entire margins.

Fruits

rounded triangular in cross section.

Seeds

pale brown, pitted.

2n

=28.

Iris hexagona

Iris tenuis

Distribution
[WildflowerSearch map]
[BONAP county map]
[BONAP county map]
Discussion

Open slopes in Douglas-fir forest. Flowering May–Jul. 100–1000 m. Casc, WV. Native.

Iris tenuis is the only member of subgenus Limniris, section Lophiris (crested iris) in western North America. This species is a narrow endemic, currently known only from three counties in Oregon.

Source Flora of Oregon, volume 1, page 262
Ann Willyard
Sibling taxa
I. bracteata, I. chrysophylla, I. douglasiana, I. germanica, I. innominata, I. missouriensis, I. pseudacorus, I. tenax, I. tenuis, I. tenuissima
I. bracteata, I. chrysophylla, I. douglasiana, I. germanica, I. innominata, I. missouriensis, I. pseudacorus, I. tenax, I. tenuissima
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