Thelypodium laxiflorum |
Thelypodium howellii |
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catleaf, droopflower thelypody, loose-flower thelypody |
Howell's thelypody |
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Habit | Biennials; somewhat glaucous, glabrous throughout or pubescent basally. | Biennials or, rarely, perennials; (short-lived); glaucous, glabrous (except petioles). | ||||
Stems | branched distally, (1.5–)3–14(–23.5) dm, (glabrous throughout or sparsely to densely hirsute proximally). |
branched distally, 1–8(–9.3) dm. |
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Basal leaves | (and proximal cauline): petiole (1–)1.7–8(–11) cm, pubescent or glabrous; blade oblanceolate in outline (lateral lobes usually oblong to linear, rarely deltate), (4–)7.2–20.5(–30) cm × (6–)10–40(–100) mm, margins pinnately lobed or lyrate (lobes entire or dentate). |
petiole 0.5–2 cm, ciliate; blade often oblanceolate to spatulate, sometimes oblong or lanceolate, 2–10(–13.5) cm × 10–23(–40) mm, margins often lyrate to dentate, sometimes entire or repand. |
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Cauline leaves | petiolate; blade usually lanceolate to linear, sometimes oblanceolate to oblong, 1.5–7(–10) cm × 3–12(–20) mm, margins usually entire or repand, rarely lobed. |
(ascending); sessile; blade often lanceolate to linear, sometimes oblong, (0.8–)1–9.7(–14.5) cm × 2–10(–30) mm, (base usually amplexicaul to strongly sagittate, rarely auriculate), margins entire. |
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Racemes | corymbose, somewhat lax, considerably elongated in fruit. |
lax, elongated in fruit, (flower buds ovate to lanceolate). |
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Flowers | sepals (equal), ascending, oblong, (2.5–)3–5(–5.5) × 1–1.7(–3) mm, (lateral pair not saccate); petals usually white, rarely lavender, usually spatulate, rarely obovate, 5–7.5(–9.5) × 1.5–2.5(–3.5) mm, margins not crisped, claw obscurely differentiated from blade (widest at base); nectar glands continuous, flat, subtending bases of stamens; filaments tetradynamous, median pairs 3–4.5(–5.5) mm, lateral pair 2.5–3.5(–4.5) mm; anthers included, oblong, (1–)1.5–2.2(–2.5) mm, not circinately coiled; gynophore 0.5–0.8(–1.5) mm. |
sepals erect, linear or lanceolate, (3.5–)5–8.5(–11.5) × (0.7–)1–2(–2.5) mm; petals lavender to purple, linear or oblanceolate to spatulate, (6–)9–16.5(–22) × 0.5–2.7(–3) mm, margins partially crisped, claw differentiated from blade, [slender, (2.5–)4–7(–11) mm, narrowest at base]; nectar glands confluent, subtending bases of stamens; filaments slightly tetradynamous, median pairs (3–)5.5–9(–12) mm, lateral pair (2.5–)4.5–8(–10) mm; anthers slightly exserted to included, linear, (1.5–)2–4(–5.5) mm, not circinately coiled; gynophore (stout), 0.5–1(–3.5) mm. |
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Fruiting pedicels | often divaricate, sometimes reflexed, rarely horizontal or divaricate-ascending, straight, slender, (4–)5–13(–19) mm, somewhat flattened at base. |
usually ascending, rarely divaricate-ascending, usually straight, rarely slightly incurved, stout, (2.5–)3.5–8(–14.5) mm, not flattened at base. |
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Fruits | divaricate to reflexed, submoniliform to strongly torulose, straight or curved, terete, (2–)3–6.6(–7.4) cm × 0.7–1(–1.5) mm, (replum constricted between seeds); ovules 26–62 per ovary; style usually clavate to subclavate, rarely cylindrical, (0.5–)0.8–2(–5) mm. |
often ascending, sometimes erect or divaricate, slightly torulose, straight or slightly incurved (forming straight line with pedicel), terete, 1.5–6.5(–8.2) cm × 1–1.3(–2) mm; ovules 22–40 per ovary; style cylindrical or subclavate, (0.5–)1–2.7(–4.3) mm. |
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Seeds | (oblong), (1–)1.3–1.8(–2) × 0.5–1 mm. |
(1–)1.2–1.7(–2) × 0.5–0.7 mm. |
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Thelypodium laxiflorum |
Thelypodium howellii |
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Phenology | Flowering May–Sep. | |||||
Habitat | Talus, rocky slopes, cliffs, pinyon-juniper-brush communities | |||||
Elevation | 1500-3100 m (4900-10200 ft) | |||||
Distribution |
CO; NV; UT
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CA; OR; WA
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Discussion | Subspecies 2 (2 in the flora). Streptanthus howellii (S. Watson) M. E. Jones is a later homonym of S. howellii S. Watson 1885. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 7, p. 735. | FNA vol. 7, p. 732. | ||||
Parent taxa | Brassicaceae > tribe Thelypodieae > Thelypodium | Brassicaceae > tribe Thelypodieae > Thelypodium | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | Stanleyella wrightii var. tenella, T. wrightii var. tenellum | Cartiera howellii, Thelypodiopsis howellii | ||||
Name authority | Al-Shehbaz: Contr. Gray Herb. 204: 129, plate 22A. (1973) | S. Watson: Proc. Amer. Acad. Arts 21: 445. (1886) | ||||
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