Iris longipetala

Herbert in W. J. Hooker and G. A. W. Arnott

in W. J. Hooker and G. A. W. Arnott, Bot. Beechey Voy., 395. 1840.

Common names: Long-petaled iris
Endemic
Treatment appears in FNA Volume 26. Treatment on page 389. Mentioned on page 374.

Rhizomes with short, creeping branches, stout, 2–2.5 cm diam., covered with bases of old leaves; roots numerous, fleshy. Stems simple or 1–2-branched, solid, 3–6 dm. Leaves: basal persistent, blade dark green, turning gray or yellowbrown when drying, veins not prominent, linear, 4–7 dm × 0.6–1 cm, usually longer than stem, glaucous or subglaucous, apex acute; cauline 2–3, reduced. Inflorescence units 3–6-flowered; spathes distant, inner sometimes 10 cm distal to outer, green, narrowly linearlanceolate, 8–15 cm × 20–40 mm, herbaceous, margins and apex scarious. Flowers: perianth pale blue-violet or nearly white, with lilac-purple veins; floral-tube funnelform, 0.5–1.3 cm; sepals spreading, then drooping at apex, white, flecked and veined with violet, obovate, 8–10 × 3–5 cm, base attenuate into narrow claw with prominent yellow ridge, signal a yellowish basal patch; petals semierect, oblong, 8–9 × 1.5–2 cm, base gradually attenuate, apex emarginate, bluntly rounded; ovary trigonal with central ridge in each face, 2–5 cm; style narrow basally, widening distally, 3.5–4 × 0.6–1 cm, crests overlapping basally, subquadrate, 1–1.5 cm, margins incised; stigmas obscurely to prominently 2-lobed, margins crenate; pedicels stout, 3–9 cm, unequal at anthesis, becoming ± equal at maturity. Capsules 6-ribbed, oblong-ovoid, tapering to either end, almost round in cross-section, 8–9 cm. Seeds dark-brown, globular, wrinkled. 2n = 86, 88.


Phenology: Flowering Mar–Apr.
Habitat: Wet, heavy soil along coast

Discussion

Iris longipetala hybridizes with I. missouriensis and is found from Mendocino County south to Monterey.

Selected References

None.

Lower Taxa

None.

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

... more about "Iris longipetala"
dehiscing +  and latrorse +
yellowbrown +  and gray +
not prominent +
Rounded (?) +  and Acute (?) +
scarious +
Norlan C. Henderson +
Herbert in W. J. Hooker and G. A. W. Arnott +
attenuate +
Iris subsect. Longipetalae +
additional +
cordlike +
enlarging +
round +, tapering +  and oblong-ovoid +
8 cm80 mm <br />0.08 m <br /> (9 cm90 mm <br />0.09 m <br />) +
Long-petaled iris +
overlapping +
subquadrate +
1cm +  and 1.5cm +
monochasial +
distinct or;partly completely connate +
hollow +  and solid +
ridged +  and terete +
0.5 cm5 mm <br />0.005 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
sessile +  and pedicellate +
fragrant +
upward-facing +
hollow +, solid +, branched +  and simple +
flattened +, terete +  and cordlike +
indehiscent +  and loculicidal +
woody;firm;cartilaginous +
Wet, heavy soil along coast +
multicellular +
distinct +
cauline +  and basal +
scale-like +
distinct +
conspicuous +
triangular +  and rounded +
crenate +  and incised +
6-angled +, 3-angled +  and terete +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
3 cm30 mm <br />0.03 m <br /> (9 cm90 mm <br />0.09 m <br />) +
4 cm40 mm <br />0.04 m <br /> (18 cm180 mm <br />0.18 m <br />) +
differentiated +
8 cm80 mm <br />0.08 m <br /> (9 cm90 mm <br />0.09 m <br />) +
reduced +
1.5 cm15 mm <br />0.015 m <br /> (?) +  and 2 cm20 mm <br />0.02 m <br /> (?) +
Flowering Mar–Apr. +
in W. J. Hooker and G. A. W. Arnott, Bot. Beechey Voy., +
2 cm20 mm <br />0.02 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
heterogeneous +
tan;dark-brown +
conspicuously roughened +  and extensively corky +
4 +  and 20 +
wrinkled +
globular +
flecked +  and white +
drooping +  and spreading +
obovate +
expanding +
3 cm30 mm <br />0.03 m <br /> (5 cm50 mm <br />0.05 m <br />) +
persisting +
distal +  and outer +
10 cm100 mm <br />0.1 m <br /> (?) +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
monochasial +
solid +, 1-2-branched +  and simple +
yellowbrown +  and gray +
not prominent +
3.5cm;4cm +
3-lobed +  and filiform +
0.6cm +  and 1cm +
Undefined subg. Limniris +
Iris longipetala +
Iris (sect. Limniris) ser. Longipetalae +
species +
connate +  and distinct +
scarious +
spathaceous +  and more-flowered +
yellowbrown +  and gray +
obscure;prominent +
hardened +  and papery +
unequal +