Thelypodium howellii |
Thelypodium eucosmum |
|
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Howell's thelypody |
arrowleaf thelypody |
|
Habit | Plants biennial or rarely short-lived perennial, glabrous except petioles; caudices naked. | Plants biennial or rarely short-lived perennial, glabrous except petioles, glaucous; caudices naked. |
Stems | straight, 1–8(9.3) dm. |
straight, 2–10 dm. |
Basal leaves | oblanceolate, spatulate, oblong, or lanceolate, 2–10(13.5) × 1–2.3(4) cm; margins lyrate, dentate, or entire; petioles 0.5–2 cm, ciliate. |
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. |
Cauline leaves | lanceolate, linear, or oblong; (0.8)1–9.7(14.5) × 0.2–1(3) cm, bases amplexicaul to sagittate, sessile. |
lanceolate to oblong, 1.8–4.5(6) × 0.5–1.6(2.4) cm, bases amplexicaul to auriculate, sessile. |
Inflorescences | lax, fruiting pedicels straight, ascending to divaricate; (2.5)3.5–8(14.5) mm. |
lax, fruiting pedicels horizontal to divaricate; (2.5)3–5.5(6.5) mm. |
Flowers | buds ovate to lanceolate; sepals linear or lanceolate; erect; (3.5)5–8.5(11.5) mm; petals linear, oblanceolate to spatulate; (6)9–16.5(22) × (0.5)0.8–2.7(3) mm, lavender to purple; claws (2.5)4–7(11) mm; narrowest at base; petal margins partially crisped; median filaments free or united; anthers included, linear; (1.5)2–4(5.5) mm, not circinately coiled, nectar glands confluent, subtending bases of all stamens; ovules 22–40 per ovary; styles (0.5)1–2.7(4.3) mm; stigmas entire; gynophore (0.2)0.5–1(3.5) mm. |
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. |
Fruits | terete; straight and forming a straight line with pedicel, slightly torulose; (1.5)2–6.2(8.2) cm × 1–1.3(2) mm. |
terete, torulose; (2)2.4–5(6.5) cm × 0.7–1(1.3) mm. |
Seeds | (1)1.2–1.7(2) × 0.5–0.7 mm. |
0.7–1.5 × 0.5–0.8 mm. |
2n | =26. |
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Thelypodium howellii |
Thelypodium eucosmum |
|
Distribution | ||
Discussion | 2 subspecies. |
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. |
Source | Flora of Oregon, volume 2, page 517 Ihsan Al-Shehbaz |
Flora of Oregon, volume 2, page 517 Ihsan Al-Shehbaz |
Sibling taxa | ||
Subordinate taxa | ||
Web links |