Thelypodium laciniatum |
Thelypodium eucosmum |
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cut-leaf thelypody, feathery thelypodium, many-flower thelypody, thick-leaf thelypody, thick-leaf thelypody (var. laciniatum), western thelypodium |
arrow-leaf thelypody, world thelypody |
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Habit | Biennials; somewhat glaucous, glabrous throughout. | Biennials or perennials; (short-lived); glaucous, glabrous (except petioles). |
Stems | branched proximally and/or distally, (1.3–)2.6–10(–14.5) dm. |
branched distally, 2–10 dm. |
Basal leaves | (and proximal cauline): petiole (1–)1.5–10(–15) cm; blade lanceolate to deltate-lanceolate, or oblong to ovate (lateral lobes oblong to ovate), (4.3–)6.8–24(–45) cm × (10–)18–85(–140) mm, margins pinnately lobed or laciniate (lobes sinuate, laciniate, or dentate). |
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. |
Cauline leaves | petiolate; blade lanceolate to linear-lanceolate, similar to basal, smaller distally, margins entire or sinuate to laciniate. |
(ascending); sessile; blade lanceolate to oblong, 1.8–4.5(–6) cm × 5–16(–24) mm, (base amplexicaul to strongly auriculate), margins entire. |
Racemes | dense, slightly elongated in fruit (to 9.5 dm, flower buds narrowly oblong). |
lax, slightly elongated in fruit, (flower buds oblong-linear). |
Flowers | sepals erect, oblong to linear-oblong, (3.5–)4–7.5(–9.5) × (0.8–)1–2(–2.5) mm; petals white or purple, often linear, sometimes linear-lanceolate, (6–)8.5–18(–20) × 0.3–0.8(–1.5) mm, margins slightly crisped, claw strongly differentiated from blade, [(2.5–)3–6(–7) mm, widest at base]; nectar glands confluent, lateral and median; filaments subequal, (4.5–)6.5–12(–15) mm; anthers exserted, linear, 2–4(–5.5) mm, circinately coiled, (apiculate); gynophore (0.5–)1–5(–8.5) 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. |
Fruiting pedicels | horizontal to, rarely, divaricate, straight, often stout, (2–)3–6.5(–15) mm, often flattened at base. |
horizontal to divaricate, usually straight, rarely slightly incurved, slender, (2.5–)3–5.5(–6.5) mm, slightly flattened at base. |
Fruits | divaricate-ascending to slightly reflexed, torulose, somewhat tortuous, terete, (2.5–)3.5–10(–12) cm × (0.7–)1–1.5(–2) mm; ovules 56–108 per ovary; style usually cylindrical, rarely subclavate, (0.3–)0.7–2.5(–4) 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. |
Seeds | (0.7–)1–1.5(–1.8) × 0.5–0.7(–1) mm. |
0.7–1.5 × 0.5–0.8 mm. |
2n | = 26. |
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Thelypodium laciniatum |
Thelypodium eucosmum |
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Phenology | Flowering Apr–Aug. | Flowering May–Jul. |
Habitat | Rock crevices, cliffs, rocky outcrops, among boulders, serpentine rock, talus, canyon walls, limestone ledges | Shady slopes and canyons, pinyon-juniper and oak woodland communities, stream beds, streamsides |
Elevation | 0-2400 m (0-7900 ft) | 700-1000 m (2300-3300 ft) |
Distribution |
CA; ID; NV; OR; WA; BC
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OR
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Discussion | 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.) |
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Source | FNA vol. 7, p. 734. | FNA vol. 7, p. 731. |
Parent taxa | Brassicaceae > tribe Thelypodieae > Thelypodium | Brassicaceae > tribe Thelypodieae > Thelypodium |
Sibling taxa | ||
Synonyms | Macropodium laciniatum, Pachypodium laciniatum, T. laciniatum var. streptanthoides, T. leptosepalum, T. streptanthoides | |
Name authority | (Hooker) Endlicher: in W. G. Walpers, Repert. Bot. Syst. 1: 172. (1842) | B. L. Robinson: in A. Gray et al., Syn. Fl. N. Amer. 1(1,1): 175. (1895) |
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