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many-flowered thelypody

Habit Plants biennial, glabrous except for petioles.
Stems

hollow; (1.8)4.5–13(21) dm.

Basal leaves

oblong or occasionally ovate or lanceolate; (3.8)6–23(28) × (0.9)2–6.5(10) cm;

margins dentate or sinuate;

petioles (1)1.8–9.5(13) cm, ciliate.

Cauline leaves

lower similar to basal; middle and upper cauline leaves lanceolate, bases not auriculate;

margins dentate or entire, petiolate.

Inflorescences

densely flowered, fruiting pedicels erect distally, curved upwards; stout; (1.5)2.5–5(7) mm.

Flowers

sepals narrowly oblong; erect; (4)4.5–8(9) × 1–2 mm, white, sometimes tipped with green;

petals oblanceolate to spatulate; (7)9–15(16) × 1–2 mm, white;

claws (3)3.5–5.5(6) mm; widest at base;

filaments subequal;

anthers linear to narrowly oblong, 2.5–4.5(6) mm, circinately coiled, apiculate, nectar glands confluent;

ovules 50–78 per ovary;

styles (0.5)0.7–1.5(3) mm;

stigmas entire;

gynophore 1–4(6) mm.

Fruits

erect, subappressed to rachis; terete; somewhat tortuous, torulose; (1.8)3.3–8(10) cm × (0.7)1–1.5(1.8) mm.

Seeds

(0.7)1–1.5(2) × 0.5–0.7(1) mm.

2n

=26.

Thelypodium sagittatum

Thelypodium milleflorum

Distribution
[WildflowerSearch map]
[BONAP county map]
[WildflowerSearch map]
[BONAP county map]
Discussion

Sand dunes, sagebrush, desert shrub communities. Flower­ing May–Jul. 100–1700 m. BR, Col, Owy. CA, ID, NV, WA; southeast to UT. Native.

Source Flora of Oregon, volume 2 draft
Ihsan Al-Shehbaz
Sibling taxa
T. brachycarpum, T. eucosmum, T. flexuosum, T. howellii, T. integrifolium, T. laciniatum, T. milleflorum
T. brachycarpum, T. eucosmum, T. flexuosum, T. howellii, T. integrifolium, T. laciniatum
Synonyms Thelypodium laciniatum var. milleflorum
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