Thelypodium wrightii
Thelypodium eucosmum
Wright's stanleyella, Wright's thelypody
arrow-leaf thelypody, world thelypody
branched distally, (6.5–)9.5–22.5(–28) dm.
branched distally, 2–10 dm.
(and proximal cauline): petiole (2–)4.5–8.5(–13.7) cm;
blade often lanceolate, sometimes oblanceolate in outline (lateral lobes oblong to linear or deltate), (6.5–)9.5–22.5(–28) cm × 28–55(–75) mm, margins pinnately lobed or lyrate (lobes entire or denticulate).
petiole (0.9–)1.4–3(–4.5) cm, ciliate;
blade usually oblanceolate to oblong or lanceolate, rarely ovate or elliptic, (2.8–)3.5–8.8(–11) cm × (7–)10–25(–35) mm, margins often entire or repand, sometimes sinuate.
petiolate;
blade lanceolate to linear-lanceolate, 3.5–8.5(–13.5) cm × 7–14(–23) mm, margins usually entire or dentate, rarely lobed.
(ascending);
sessile;
blade lanceolate to oblong, 1.8–4.5(–6) cm × 5–16(–24) mm, (base amplexicaul to strongly auriculate), margins entire.
somewhat lax, considerably elongated in fruit.
lax, slightly elongated in fruit, (flower buds oblong-linear).
sepals spreading or ascending oblong to linear, (3–)4–6(–7) × (0.8–)1–1.3(–1.5) mm;
petals usually white, rarely lavender, linear or oblong, 4–7.5(–9) × 1–1.8(–2) mm, margins not crisped, claw not differentiated from blade (base sometimes clawlike, to 2 mm, widest at base);
nectar glands confluent;
filaments equal, (3–)3.5–6.5(–8.5) mm;
anthers (1–)1.5–2.5(–3) mm, circinately coiled;
gynophore 0.2–2(–5) mm.
sepals erect, linear-oblong, 5–7(–8) × (0.8–)1–1.5(–1.8) mm;
petals dark purple, spatulate to oblanceolate, (6.6–)7.5–10(–11.5) × 1–1.8(–2) mm, margins not crisped, claw differentiated from blade, [slender, (3–)3.5–5(–5.5) mm, narrowest at base];
nectar glands confluent, subtending bases of stamens;
filaments subequal, (4.5–)6–9(–10) mm;
anthers exserted, linear to narrowly oblong, 2.5–4(–4.5) mm, circinately coiled;
gynophore (1–)2.5–6(–7.5) mm.
horizontal to divaricate, sometimes reflexed, straight or curved, sometimes secund, slender, (5–)7–13(–17) mm, slightly flattened at base.
horizontal to divaricate, usually straight, rarely slightly incurved, slender, (2.5–)3–5.5(–6.5) mm, slightly flattened at base.
horizontal or reflexed, torulose, straight to somewhat curved, flattened, (2.5–)3.8–7.4(–9) cm × 1–1.2(–1.5) mm, (replum not constricted between seeds);
ovules 76–128 per ovary;
style usually clavate to subclavate, rarely cylindrical, (0.5–)0.8–2(–3) mm.
divaricate to ascending, torulose, straight or slightly incurved, terete, (2–)2.4–5(–6.5) cm × 0.7–1(–1.3) mm;
ovules 44–58 per ovary;
style usually cylindrical, rarely subclavate, 0.5–1.5(–2) mm.
0.7–1.3(–1.5) × 0.5–0.8 mm.
0.7–1.5 × 0.5–0.8 mm.
Thelypodium wrightii
Thelypodium eucosmum
Study of extensive material that has accumulated during the past three decades reveals that the differences between subsp. oklahomensis and subsp. wrightii, which are based solely on variations in gynophore and fruit lengths, do not hold as clearly as previously thought (I. A. Al-Shehbaz 1973; R. C. Rollins 1993).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Of conservation concern.
Thelypodium eucosmum is known only from Baker, Grant, and Wheeler counties. It is in the Center for Plant Conservation’s National Collection of Endangered Plants.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
WildflowerSearch
iNaturalist
USDA Plants Database
OR
Flora NW
PNW Herbaria
