Thelypodium wrightii |
Thelypodium stenopetalum |
|
---|---|---|
Wright's stanleyella, Wright's thelypody |
slender-petal thelypodium, slenderpetal thelypody |
|
Habit | Biennials; slightly glaucous, glabrous. | Biennials; glaucous, glabrous (except petioles). |
Stems | branched distally, (6.5–)9.5–22.5(–28) dm. |
(often decumbent), branched basally, sometimes also distally, (2.6–)3–8(–9) dm. |
Basal leaves | (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). |
petiole 1–4.5(–6) cm, ciliate; blade often oblong or lanceolate, sometimes ovate to spatulate, 3.8–15(–18) cm × 15–35(–42) mm, margins usually entire, rarely repand. |
Cauline leaves | petiolate; blade lanceolate to linear-lanceolate, 3.5–8.5(–13.5) cm × 7–14(–23) mm, margins usually entire or dentate, rarely lobed. |
(ascending); sessile; blade usually lanceolate to oblong, rarely linear to linear-lanceolate, (1.3–)1.6–4.8(–6) cm × (3–)5–9(–15) mm, (base usually amplexicaul to sagittate, rarely auriculate), margins entire. |
Racemes | somewhat lax, considerably elongated in fruit. |
lax, elongated in fruit, (flower buds oblong-linear). |
Flowers | 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. |
sepals erect, linear to linear-oblong, (6–)6.5–9(–10) × 1–1.5(–1.8) mm; petals usually lavender, rarely white, linear, (8–)9.5–15(–16.5) × 0.3–0.5(–0.8) mm, margins crisped between blade and claw, claw differentiated from blade, [slender, 4–6.5(–8.5) mm, narrowest at base]; nectar glands confluent, subtending bases of stamens; filaments slightly tetradynamous, median pairs (7–)8–12.5(–14) mm, lateral pair (5.5–)7–11(–12) mm; anthers exserted, linear to narrowly oblong, 3.5–5(–6) mm, circinately coiled; gynophore stout, 0.5–3.5(–5) mm. |
Fruiting pedicels | horizontal to divaricate, sometimes reflexed, straight or curved, sometimes secund, slender, (5–)7–13(–17) mm, slightly flattened at base. |
usually ascending to divaricate-ascending, rarely horizontal or divaricate, usually straight, rarely slightly incurved, stout, (3.5–)4–8 mm, not flattened at base. |
Fruits | 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. |
usually divaricate-ascending to ascending, rarely divaricate, slightly torulose, straight or slightly incurved, terete or slightly 4-angled, (2.2–)2.8–5(–6.3) cm × 1–1.5(–1.8) mm; ovules 50–82 per ovary; style cylindrical, 1–2(–2.5) mm. |
Seeds | 0.7–1.3(–1.5) × 0.5–0.8 mm. |
1–1.3(–1.5) × 0.7–0.8 mm. |
Thelypodium wrightii |
Thelypodium stenopetalum |
|
Phenology | Flowering (Mar-)Jun–Oct. | Flowering May–Aug. |
Habitat | Rock crevices, shady slopes, rocky hillsides, canyons, stream banks, creek beds, pinyon-juniper communities, oak woodlands | Alkaline meadows and flats |
Elevation | 1200-2300 m (3900-7500 ft) | 1900-2100 m (6200-6900 ft) |
Distribution |
AZ; CO; NM; TX; UT; Mexico (Baja California, Chihuahua, Coahuila, Hidalgo)
|
CA |
Discussion | 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.) |
Of conservation concern. Thelypodium stenopetalum is known from Bear Valley, San Bernardino County. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 7, p. 738. | FNA vol. 7, p. 737. |
Parent taxa | Brassicaceae > tribe Thelypodieae > Thelypodium | Brassicaceae > tribe Thelypodieae > Thelypodium |
Sibling taxa | ||
Synonyms | Stanleyella wrightii, T. wrightii subsp. oklahomensis | Thelypodiopsis stenopetala |
Name authority | A. Gray: Smithsonian Contr. Knowl. 3(5): 7. (1852) | S. Watson: Proc. Amer. Acad. Arts 22: 468. (1887) |
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