Thelypodium brachycarpum |
Thelypodium wrightii |
|
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short-pod thelypodium, short-pod thelypody |
Wright's stanleyella, Wright's thelypody |
|
Habit | Biennials; often glaucous, glabrous or pubescent. | Biennials; slightly glaucous, glabrous. |
Stems | branched, (1.3–)3.4–8.3(–12) dm, (somewhat glaucous, glabrous throughout or pubescent proximally). |
branched distally, (6.5–)9.5–22.5(–28) dm. |
Basal leaves | petiole (1.5–)2–5.2(–9) cm, glabrous or pubescent; blade usually oblanceolate to spatulate, rarely obovate or lanceolate, 3.3–14(–20) cm × (05–)10–32(–47) mm, margins often pinnately lobed to lyrate, sometimes dentate or entire. |
(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). |
Cauline leaves | sessile; blade linear to lanceolate, smaller distally, (base sagittate, appressed to stem), margins usually entire, rarely dentate. |
petiolate; blade lanceolate to linear-lanceolate, 3.5–8.5(–13.5) cm × 7–14(–23) mm, margins usually entire or dentate, rarely lobed. |
Racemes | dense, slightly elongated in fruit, (flower buds oblong). |
somewhat lax, considerably elongated in fruit. |
Flowers | sepals erect, lanceolate to linear-lanceolate or ovate, (3–)3.5–5(–5.5) × 1–1.5(–2) mm; petals white, linear to narrowly oblanceolate, 8–12.5(–16) × 0.3–0.5(–1) mm, margins strongly crisped, claw differentiated from blade, (slender, 2.5–4 mm, narrowest at base); nectar glands surrounding bases of lateral stamens, median glands absent; filaments subequal or slightly tetradynamous, 2.5–6.5(–10) mm; anthers exserted, linear, 1.5.–2(–2.5) mm, slightly circinately coiled, (apiculate); gynophore (0.5–)1–2(–5) mm. |
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. |
Fruiting pedicels | horizontal to divaricate, straight or slightly curved, stout, 1–2(–2.5) mm, flattened at base. |
horizontal to divaricate, sometimes reflexed, straight or curved, sometimes secund, slender, (5–)7–13(–17) mm, slightly flattened at base. |
Fruits | divaricate to ascending, torulose, often straight, sometimes slightly curved, terete, (0.8–)1.2–2.7(–3) cm × 1–1.5(–2) mm; ovules 12–26 per ovary; style cylindrical, (0.2–)0.5–1(–2.5) mm. |
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. |
Seeds | (plump), (1.3–)1.5–2 × 0.8–1(–1.3) mm. |
0.7–1.3(–1.5) × 0.5–0.8 mm. |
Thelypodium brachycarpum |
Thelypodium wrightii |
|
Phenology | Flowering Apr–Aug. | Flowering (Mar-)Jun–Oct. |
Habitat | Strongly alkaline meadows and desert flats | Rock crevices, shady slopes, rocky hillsides, canyons, stream banks, creek beds, pinyon-juniper communities, oak woodlands |
Elevation | 600-2300 m (2000-7500 ft) | 1200-2300 m (3900-7500 ft) |
Distribution |
CA; OR
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AZ; CO; NM; TX; UT; Mexico (Baja California, Chihuahua, Coahuila, Hidalgo)
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Discussion | Thelypodium brachycarpum is known in California from Napa, Shasta, and Siskiyou counties and in Oregon from Klamath County. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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.) |
Source | FNA vol. 7, p. 730. | FNA vol. 7, p. 738. |
Parent taxa | Brassicaceae > tribe Thelypodieae > Thelypodium | Brassicaceae > tribe Thelypodieae > Thelypodium |
Sibling taxa | ||
Synonyms | Thelypodiopsis brachycarpa, Thelypodiopsis brachypoda | Stanleyella wrightii, T. wrightii subsp. oklahomensis |
Name authority | Torrey: in C. Wilkes et al., U.S. Expl. Exped. 17(2): 231, plate 1. (1874) | A. Gray: Smithsonian Contr. Knowl. 3(5): 7. (1852) |
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