Thelypodium sagittatum |
Thelypodium howellii |
|||||||||
---|---|---|---|---|---|---|---|---|---|---|
arrow thelypody, slender thelypody |
Howell's thelypody |
|||||||||
Habit | Biennials or perennials; (short-lived); sometimes glaucous, glabrous throughout or sparsely to densely pubescent. | Biennials or, rarely, perennials; (short-lived); glaucous, glabrous (except petioles). | ||||||||
Stems | branched often proximally and distally, (2–)3–8(–12.5) dm, (glabrous or pubescent). |
branched distally, 1–8(–9.3) dm. |
||||||||
Basal leaves | petiole (1–)2–8(–14) cm, ciliate; blade usually oblanceolate to ovate, rarely oblong, (2–)6.5–20(–29) cm × 10–42(–50) mm, margins entire, (surfaces glabrous or pubescent). |
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. |
||||||||
Cauline leaves | (ascending); sessile; blade lanceolate to oblong-lanceolate, (0.8–)1.6–8.5(–14) cm × 2–13(–28) mm, (base amplexicaul to sagittate), margins entire, (surfaces glabrous or pubescent). |
(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. |
||||||||
Racemes | sometimes corymbose, lax or dense, elongated or not in fruit, (flower buds ovate to lanceolate). |
lax, elongated in fruit, (flower buds ovate to lanceolate). |
||||||||
Flowers | sepals erect, ovate to oblong, (2.5–)3–6(–10) × (1–)1.5–2(–2.5) mm; petals white or lavender to purple, oblanceolate to spatulate or linear, (5–)7–14(–19) × (0.5–)1–3(–4) mm, margins slightly crisped between blade and claw, claw differentiated from blade, [slender, (2–)3–6.5(–10) mm, narrowest at base]; nectar glands confluent and subtending bases of stamens, sometimes only lateral; filaments tetradynamous, median pairs 3–5.5(–8) mm, lateral pair (2–)2.5–4.5(–7) mm; anthers included or partially exserted, oblong, (1.5–)2–3.2(–5) mm, not circinately coiled; gynophore (stout), 0.5–1(–2) 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. |
||||||||
Fruiting pedicels | horizontal to divaricate, often curved upward, stout or slender, (2.5–)3.5–11(–20) mm, not 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. |
||||||||
Fruits | erect, torulose, straight or slightly incurved (forming arc with pedicel), usually terete, rarely 4-angled, 1–5.3(–6.9) cm × (0.5–)0.8–1(–1.2) mm; ovules 20–62per ovary; style cylindrical, 0.5–1.5(–3.3) 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. |
||||||||
Seeds | (flattened), (0.7–)1–1.3(–1.5) × 0.5–0.7(–1) mm. |
(1–)1.2–1.7(–2) × 0.5–0.7 mm. |
||||||||
Thelypodium sagittatum |
Thelypodium howellii |
|||||||||
Distribution |
CO; ID; MT; NV; UT; WA; WY
|
CA; OR; WA
|
||||||||
Discussion | Subspecies 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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.) |
||||||||
Key |
|
|
||||||||
Source | FNA vol. 7, p. 736. | FNA vol. 7, p. 732. | ||||||||
Parent taxa | Brassicaceae > tribe Thelypodieae > Thelypodium | Brassicaceae > tribe Thelypodieae > Thelypodium | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Synonyms | Streptanthus sagittatus, Pachypodium sagittatum, Thelypodiopsis nuttallii, Thelypodiopsis sagittata, Thelypodiopsis torulosa, T. nuttallii, T. torulosum | Cartiera howellii, Thelypodiopsis howellii | ||||||||
Name authority | (Nuttall) Endlicher: in W. G. Walpers, Repert. Bot. Syst. 1: 172. (1842) | S. Watson: Proc. Amer. Acad. Arts 21: 445. (1886) | ||||||||
Web links |