Iris macrosiphon

Torrey

Pacif. Railr. Rep. 4(5): 144. 1857.

Common names: Ground iris
IllustratedEndemic
Synonyms: Iris elata Piper
Treatment appears in FNA Volume 26. Treatment on page 384. Mentioned on page 374, 381, 382, 385, 386, 387.

Rhizomes many-branched, forming tufts, with fibrous remains of old leaves at nodes, slender, 0.6–0.8 cm diam.; roots few, fibrous. Stems simple, solid, almost absent or to 2.5 dm. Leaves: basal longer than stem, blade light green, finely veined, narrowly linear, 3–4 dm × 0.4–0.6 cm, glaucous, margins not thickened, apex acute; cauline 1–2, spreading, sheathing for about 1/2 length, foliaceous, blade not inflated, 0.7–1 dm. Inflorescence units (1–) 2-flowered; spathes nearly opposite, connivent, linearlanceolate, 4–9.5 cm × 4–6 mm, subequal or outer longer. Flowers: perianth indigo, purple, lavender, white, cream, or yellow; floral-tube linear, gradually dilating apically, 6 cm; sepals usually with fine, dark veins basally, becoming coarser on claw, oblanceolate or obovate, 3.9–7 × 2 cm, base abruptly attenuate into claw; petals oblanceolate, 3.5–6 × 0.5–1.6 cm, base gradually attenuate; ovary ovoid, ca. 1 cm; style 2–3.5 cm, crests overlapping, reflexed, semiovate, 0.8–1.8 cm, margins denticulate; stigmas triangular, margins entire; pedicel 1.5–2 cm. Capsules oblong to ovoid, somewhat 3-angled in cross-section, 2.5–3 cm. Seeds dark-brown, angular, finely wrinkled. 2n = 40.


Phenology: Flowering Apr–Jun.
Habitat: Sunny hillsides, meadows, roadsides

Discussion

Iris macrosiphon hybridizes with I. chrysophylla, I. douglasiana, I. fernaldii, I. hartwegii, I. innominata, I. munzii, I. purdyi, I. tenax, and I. tenuissima.

The invalid name “Iris californica” Leichtlin has sometimes been applied to a portion of this species.

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."sheathing" is not a number.

... more about "Iris macrosiphon"
dehiscing +  and latrorse +
Norlan C. Henderson +
Torrey +
attenuate +
Iris subsect. Californicae +
light green +
not inflated +
0.4cm;0.6cm +
additional +
cordlike +
enlarging +
3-angled +, oblong +  and ovoid +
2.5 cm25 mm <br />0.025 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Ground iris +
overlapping +
semiovate +
0.8cm +  and 1.8cm +
monochasial +
distinct or;partly completely connate +
hollow +  and solid +
ridged +  and terete +
6 cm60 mm <br />0.06 m <br /> (?) +
sessile +  and pedicellate +
fragrant +
upward-facing +
hollow +, solid +, branched +  and simple +
flattened +, terete +  and cordlike +
indehiscent +  and loculicidal +
woody;firm;cartilaginous +
Sunny hillsides, meadows, roadsides +
multicellular +
distinct +
cauline +  and basal +
scale-like +
distinct +
conspicuous +
triangular +  and rounded +
denticulate +
not thickened +
1 cm10 mm <br />0.01 m <br /> (?) +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Yellow (?) +, Cream (?) +, White (?) +, Lavender (?) +, Purple (?) +  and Indigo (?) +
4 cm40 mm <br />0.04 m <br /> (18 cm180 mm <br />0.18 m <br />) +
differentiated +
3.5 cm35 mm <br />0.035 m <br /> (6 cm60 mm <br />0.06 m <br />) +
reflexed +, spreading +  and erect +
reduced +
0.5 cm5 mm <br />0.005 m <br /> (?) +  and 1.6 cm16 mm <br />0.016 m <br /> (?) +
Flowering Apr–Jun. +
Pacif. Railr. Rep. +
many-branched +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
heterogeneous +
tan;dark-brown +
conspicuously roughened +  and extensively corky +
4 +  and 20 +
wrinkled +
rounded;flattened +
reflexed +  and spreading +
obovate +  and oblanceolate +
expanding +
2 cm20 mm <br />0.02 m <br /> (?) +
connivent +  and opposite +
persisting +
4cm;9.5cm +
subequal +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Illustrated +  and Endemic +
monochasial +
solid +  and simple +
triangular +
3-lobed +  and filiform +
2 cm20 mm <br />0.02 m <br /> (?) +  and 3.5 cm35 mm <br />0.035 m <br /> (?) +
Iris elata +
Iris macrosiphon +
Iris (sect. Limniris) ser. Californicae +
species +
connate +  and distinct +
scarious +
spathaceous +  and more-flowered +
obscure;prominent +
hardened +  and papery +
unequal +