Iris fernaldii

R. C. Foster

Iridis Sp. Nov., 1. 1938.

Common names: Fernald’s iris
Endemic
Treatment appears in FNA Volume 26. Treatment on page 387. Mentioned on page 374, 384.

Rhizomes many-branched, producing dense clumps, compact, slender, ca. 0.6 cm diam., base covered with remains of old leaves; roots fibrous. Stems simple, solid, 2–4 dm. Leaves: basal with blade gray-green, usually brilliantly colored basally, drying to unusual gray-green, veins fairly prominent, to 4 dm × 0.7–0.8 cm, often quite glaucous, margins not thickened; cauline 2–several, spreading, sheathing stem for about 1/2 length, foliaceous, blade not inflated. Inflorescence units 2-flowered; spathes opposite, connivent, often flushed red basally, broadly lanceolate, 5–9 cm × 6–11 mm, subequal. Flowers: perianth pale creamy yellow with gold or gray veins; floral-tube funnelform, 3–6.2 cm, spreading apically to form wide throat; sepals horizontally spreading, claw with deep yellow median line, oblanceolate to spatulate, 4.5–7 × 1–2 cm, base gradually attenuate into broad claw; petals narrowly oblanceolate, 4.3–6 × 0.6–1.4 cm, base gradually attenuate into narrow claw; ovary elliptical, nearly circular in cross-section, 1.5–2.3 cm; style 2.2–3 cm, crests divergent, linear to narrowly oblong, 1–1.7 cm; stigmas triangular, margins entire; pedicel 0.9–2.2 cm at anthesis. Capsules oblong, roundly trigonal, distinctly beaked, 2.5–3.5 cm. Seeds dark-brown, wrinkled. 2n = 40.


Phenology: Flowering Apr–Jul.
Habitat: Mixed evergreen forest

Discussion

Iris fernaldii hybridizes with I. douglasiana, I. innominata, and I. macrosiphon.

Selected References

None.

Lower Taxa

None.

"decreasing" is not a number.No values specified."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.

... more about "Iris fernaldii"
dehiscing +  and latrorse +
Norlan C. Henderson +
R. C. Foster +
gray-green +  and colored +
attenuate +
Iris subsect. Californicae +
not inflated +
additional +
cordlike +
enlarging +
2.5 cm25 mm <br />0.025 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
4.5 cm45 mm <br />0.045 m <br /> (7 cm70 mm <br />0.07 m <br />) +
oblanceolate +  and spatulate +
Fernald’s iris +
linear +  and narrowly oblong +
1cm +  and 1.7cm +
monochasial +
distinct or;partly completely connate +
hollow +  and solid +
ridged +  and terete +
3 cm30 mm <br />0.03 m <br /> (6.2 cm62 mm <br />0.062 m <br />) +
sessile +  and pedicellate +
fragrant +
upward-facing +
hollow +, solid +, branched +  and simple +
flattened +, terete +  and cordlike +
indehiscent +  and loculicidal +
woody;firm;cartilaginous +
Mixed evergreen forest +
multicellular +
distinct +
cauline +  and basal +
scale-like +
distinct +
conspicuous +
triangular +  and rounded +
not thickened +
circular +  and elliptical +
6-angled +, 3-angled +  and terete +
1.5 cm15 mm <br />0.015 m <br /> (2.3 cm23 mm <br />0.023 m <br />) +
0.9 cm9 mm <br />0.009 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
4 cm40 mm <br />0.04 m <br /> (18 cm180 mm <br />0.18 m <br />) +
differentiated +
4.3 cm43 mm <br />0.043 m <br /> (6 cm60 mm <br />0.06 m <br />) +
reflexed +, spreading +  and erect +
reduced +
0.6 cm6 mm <br />0.006 m <br /> (?) +  and 1.4 cm14 mm <br />0.014 m <br /> (?) +
Flowering Apr–Jul. +
Iridis Sp. Nov., +
many-branched +
0.6 cm6 mm <br />0.006 m <br /> (?) +
heterogeneous +
tan;dark-brown +
conspicuously roughened +  and extensively corky +
4 +  and 20 +
wrinkled +
rounded;flattened +
expanding +
connivent +  and opposite +
flushed red +
persisting +
lanceolate +
subequal +
0.6 cm6 mm <br />0.006 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
monochasial +
foliaceous +, solid +  and simple +
triangular +
3-lobed +  and filiform +
2.2 cm22 mm <br />0.022 m <br /> (?) +  and 3 cm30 mm <br />0.03 m <br /> (?) +
Undefined subg. Limniris +
Iris fernaldii +
Iris (sect. Limniris) ser. Californicae +
species +
connate +  and distinct +
scarious +
spathaceous +  and more-flowered +
gray +  and gold +
0.7cm +  and 0.8cm +
hardened +  and papery +
unequal +