Iris brevicaulis

Rafinesque

Fl. Ludov., 20. 1817.

Common names: Short-stem iris
IllustratedEndemic
Synonyms: Iris alabamensis Small Iris foliosa Mackenzie & Bush Iris mississippiensis Alexander
Treatment appears in FNA Volume 26. Treatment on page 393. Mentioned on page 371, 374, 391, 392.

Rhizomes freely branching, producing extensive clumps, 1–2.5 cm diam. Stems declining or semi erect, sharply zigzag, with short branch at each of 2–3 bends, leaf at every bend, flower bud at every bend, solid, 2.5–3 dm. Leaves: basal erect, spreading, or prostrate, blade deep green, ensiform, 3.5–7 dm × 1.5–3.5 cm, somewhat glaucous; cauline at each of 2–3 nodes, subtending and exceeding short branch and flower, blade 2–6 dm. Inflorescences with terminal unit 2-flowered, each short branch unit 1-flowered; spathes foliaceous, lanceolate, 3–5 cm, subequal, apex acute; outer green, exceeding inner; inner partly scarious. Flowers: perianth rich blue or blue-violet; floral-tube funnelform, 1–2 cm; sepals ovate, 7.5–9 × 2.5–3 cm, base abruptly attenuate, claw light greenish yellow with darker veins, with prominent yellow midrib and large, yellow-white signal at union of limb and claw; petals erect or spreading-erect, lighter blue than sepals, oblanceolate, 5–6.5 × 1.5–2 cm; ovary prominently 6-angled, 1–1.3 cm; style greenish, 3.5–4 cm, crests reflexed, semiovoid to subquadrate, 1.2–1.5 cm, margins irregularly toothed or entire; stigmas 2-lobed, lobes rounded-deltoid; pedicel 1–1.3 cm. Capsules hexagonal to almost circular in cross-section with 6 equally placed ribs, with short beak at apex, 3–5 × 2–2.5 cm. Seeds in 2 rows per locule, light-brown, irregularly circular, flattened, 3–5 mm, very corky. 2n = 42, 44.


Phenology: Flowering Apr–Jun.
Habitat: Open, rather moist woodlands

Distribution

V26 804-distribution-map.jpg

Ont., Ala., Ark., Fla., Ill., Ind., Kans., Ky., La., Miss., Mo., Okla., Tenn.

Discussion

Iris brevicaulis hybridizes with I. fulva to produce I. ×fulvala Dykes, and with I. giganticaerulea to produce I. ×flexicaulis Small.

Selected References

None.

Lower Taxa

None.

"dm" is not declared as a valid unit of measurement for this property."dm" is not declared as a valid unit of measurement for this property. "dm" is not declared as a valid unit of measurement for this property."decreasing" is not a number.

... more about "Iris brevicaulis"
dehiscing +  and latrorse +
Norlan C. Henderson +
Rafinesque +
prostrate +, spreading +  and erect +
attenuate +
Iris subsect. Hexagonae +
ensiform +
1.5cm;3.5cm +
additional +
cordlike +
enlarging +
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
hexagonal to almost +
2 cm20 mm <br />0.02 m <br /> (?) +  and 2.5 cm25 mm <br />0.025 m <br /> (?) +
Short-stem iris +
semiovoid +  and subquadrate +
1.2cm +  and 1.5cm +
monochasial +
Ont. +, Ala. +, Ark. +, Fla. +, Ill. +, Ind. +, Kans. +, Ky. +, La. +, Miss. +, Mo. +, Okla. +  and Tenn. +
distinct or;partly completely connate +
hollow +  and solid +
ridged +  and terete +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
sessile +  and pedicellate +
fragrant +
upward-facing +
hollow +, solid +, branched +  and simple +
flattened +, terete +  and cordlike +
indehiscent +  and loculicidal +
woody;firm;cartilaginous +
Open, rather moist woodlands +
multicellular +
distinct +
cauline +  and basal +
scale-like +
distinct +
conspicuous +
rounded-deltoid +
entire +  and toothed +
6-angled +
1 cm10 mm <br />0.01 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
1 cm10 mm <br />0.01 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
4 cm40 mm <br />0.04 m <br /> (18 cm180 mm <br />0.18 m <br />) +
differentiated +
5 cm50 mm <br />0.05 m <br /> (6.5 cm65 mm <br />0.065 m <br />) +
spreading-erect +  and erect +
reduced +
1.5 cm15 mm <br />0.015 m <br /> (?) +  and 2 cm20 mm <br />0.02 m <br /> (?) +
Flowering Apr–Jun. +
Fl. Ludov., +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
heterogeneous +
tan;dark-brown +
conspicuously roughened +  and extensively corky +
4 +  and 20 +
flattened +
reflexed +  and spreading +
expanding +
2.5 cm25 mm <br />0.025 m <br /> (3 cm30 mm <br />0.03 m <br />) +
persisting +
lanceolate +
subequal +
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
Illustrated +  and Endemic +
monochasial +
3-lobed +  and filiform +
3.5 cm35 mm <br />0.035 m <br /> (?) +  and 4 cm40 mm <br />0.04 m <br /> (?) +
Iris alabamensis +, Iris foliosa +  and Iris mississippiensis +
Iris brevicaulis +
Iris (sect. Limniris) ser. Hexagonae +
species +
connate +  and distinct +
scarious +
spathaceous +  and more-flowered +
obscure;prominent +
hardened +  and papery +
unequal +