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Purdy's iris, redwood iris

slender blue iris

Rhizomes

much branched, forming dense clumps, dark red-brown, very slender, 0.3–0.6 cm diam., covered with remains of old leaves;

roots fibrous.

superficial or only slightly buried in peaty soil, cordlike portions usually 1-branched, 40 cm × 2–5 mm, bearing scalelike leaves at nodes;

nodal roots absent.

Stems

simple, solid, 1.5–2.5 dm.

simple or 1–2-branched, 3–8 dm.

Leaves

basal few, laxly spreading, longer than stem, blade bright dark green adaxially, flushed pink basally, veins subprominent, linear, 2.8–4.8 dm × 0.5–0.8 cm, rather glaucous abaxially, margins thickened, apex acute;

cauline imbricated, sheathing, free only at tips, bracteiform, blade green edged with pink, strongly striate, inflated, apex acuminate.

basal with blade slightly ribbed, 3–6 dm × 0.2–0.5 cm;

cauline 1–4, erect.

Inflorescence units

1–2-flowered;

spathes green with prominent red margins, inflated, broadly lanceolate-ovate, 5.6–7 cm × 8–13 mm, unequal, outer shorter than inner, herbaceous, apex acuminate.

1–3-flowered, branch units 1–2-flowered;

spathes pale brown, narrowly lanceolate, 2–4 cm, scarious or partially membranaceous.

Flowers

perianth pale creamy yellow flushed with pale lavender, with conspicuous brownish purple lines;

floral tube linear, 3–5 cm, somewhat dilated apically;

sepals widely spreading, veined and dotted with deeper purple on claw and limb, oblanceolate, 5.5–8.4 × 1.6–2.7 cm;

petals spreading, lanceolate, 5–7 × 1–2 cm, margins sinuate;

ovary trigonal in cross section with groove along each angle, narrow, 1–1.5 cm;

style 2–3 cm, crests narrowly semiovate or nearly linear, laciniate, 1–2 cm;

stigmas rounded-truncate to 2-lobed, never triangular, margins minutely denticulate;

pedicel 1–2 cm.

perianth pale blue or blue-violet;

floral tube 0.2–0.3 cm;

sepals pale violet, veined deep violet basally, ovate, 4–5 × 1.3–2 cm, base abruptly attenuate;

petals lavender, oblanceolate, 3.5–4.5 × 0.7–1.5 cm;

ovary trigonal, sharply angled;

style arched, narrow, 2–3 cm, crests divergent, quadrate, 0.5–0.7 cm, margins serrate;

stigmas sharply triangular;

pedicel somewhat flattened, 3–7 cm, exserted from spathe.

Capsules

oblong-ovoid, trigonal, somewhat beaked, 2–3 cm.

sharply 3-angled, almost winged, 3–4 × 1.2–1.4 cm, concave faces 6–14 mm wide.

Seeds

light brown, D-shaped, oblong-ovoid, thick, finely wrinkled.

in 1 row per locule, buff to dark brown, pyriform, with convex sides, 3–4 mm, smooth.

2n

= 40.

= 42.

Iris purdyi

Iris prismatica

Phenology Flowering Apr–Jul. Flowering Apr–Jul.
Habitat Open woods of redwood region Swampy, peaty soil
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
from FNA
AL; CT; DE; GA; KY; MA; MD; ME; NC; NH; NJ; NY; RI; SC; TN; VA
[WildflowerSearch map]
[BONAP county map]
Discussion

Iris purdyi hybridizes with I. bracteata, I. chrysophylla, I. douglasiana, I. innominata, I. macrosiphon, I. tenax, and I. tenuissima.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 26, p. 385. FNA vol. 26, p. 395.
Parent taxa Iridaceae > Iris > subg. Limniris > sect. Limniris > ser. Californicae Iridaceae > Iris > subg. Limniris > sect. Limniris > ser. Prisimaticae
Sibling taxa
I. bracteata, I. brevicaulis, I. chrysophylla, I. cristata, I. douglasiana, I. fernaldii, I. fulva, I. germanica, I. giganticaerulea, I. hartwegii, I. hexagona, I. hookeri, I. innominata, I. lacustris, I. longipetala, I. macrosiphon, I. missouriensis, I. munzii, I. orientalis, I. pallida, I. prismatica, I. pseudacorus, I. pumila, I. savannarum, I. setosa, I. sibirica, I. tenax, I. tenuis, I. tenuissima, I. tridentata, I. verna, I. versicolor, I. virginica
I. bracteata, I. brevicaulis, I. chrysophylla, I. cristata, I. douglasiana, I. fernaldii, I. fulva, I. germanica, I. giganticaerulea, I. hartwegii, I. hexagona, I. hookeri, I. innominata, I. lacustris, I. longipetala, I. macrosiphon, I. missouriensis, I. munzii, I. orientalis, I. pallida, I. pseudacorus, I. pumila, I. purdyi, I. savannarum, I. setosa, I. sibirica, I. tenax, I. tenuis, I. tenuissima, I. tridentata, I. verna, I. versicolor, I. virginica
Synonyms I. lansdaleana, I. macrosiphon var. purdyi
Name authority Eastwood: Proc. Calif. Acad. Sci., ser. 3, 1: 78, plate 7, fig. 2. (1897) Pursh: Fl. Amer. Sept. 1: 30. (1814)
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