Thelypodium laxiflorum |
Thelypodium eucosmum |
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arrowleaf thelypody |
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Habit | Plants biennial or rarely short-lived perennial, glabrous except petioles, glaucous; caudices naked. | |
Stems | straight, 2–10 dm. |
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Basal leaves | oblanceolate, oblong, lanceolate, or rarely ovate; (2.8)3.5–8.8(11) × (0.7)1–2.5(3.5) cm; margins entire or sinuate; petioles ciliate. |
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Cauline leaves | lanceolate to oblong, 1.8–4.5(6) × 0.5–1.6(2.4) cm, bases amplexicaul to auriculate, sessile. |
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Inflorescences | lax, fruiting pedicels horizontal to divaricate; (2.5)3–5.5(6.5) mm. |
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Flowers | buds oblong-linear; sepals linear-oblong; erect, 5–7(8) mm; petals spatulate to oblanceolate; (6.6)7.5–10(11.5) × 1–1.8(2) mm, purple to magenta; claws (3)3.5–5(5.5) mm; narrowest at base; petal margins not crisped; filaments subequal; (4.5)6–9(10) mm; anthers exserted, linear to narrowly oblong, circinately coiled after dehiscence, nectar glands confluent; ovules 44–58 per ovary; styles cylindrical or rarely subclavate, 0.5–1.5(2) mm; stigmas entire; gynophore (1)2.5–6(7) mm. |
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Fruits | terete, torulose; (2)2.4–5(6.5) cm × 0.7–1(1.3) mm. |
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Seeds | 0.7–1.5 × 0.5–0.8 mm. |
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Thelypodium laxiflorum |
Thelypodium eucosmum |
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Distribution | ||
Discussion | Shady slopes and canyons, pinyon-juniper and oak-woodland communities, streamsides, riverbanks. Flowering May–Jul. 300–1600 m. BW, Lava. Native. Endemic. This Oregon endemic is currently known only from Baker, Grant, and Wheeler counties. |
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Source | Flora of Oregon, volume 2, page 517 Ihsan Al-Shehbaz |
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Sibling taxa | ||
Web links |