Thelypodium eucosmum |
Thelypodium laxiflorum |
|
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arrow-leaf thelypody, world thelypody |
catleaf, droopflower thelypody, loose-flower thelypody |
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Habit | Biennials or perennials; (short-lived); glaucous, glabrous (except petioles). | Biennials; somewhat glaucous, glabrous throughout or pubescent basally. |
Stems | branched distally, 2–10 dm. |
branched distally, (1.5–)3–14(–23.5) dm, (glabrous throughout or sparsely to densely hirsute proximally). |
Basal leaves | 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. |
(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). |
Cauline leaves | (ascending); sessile; blade lanceolate to oblong, 1.8–4.5(–6) cm × 5–16(–24) mm, (base amplexicaul to strongly auriculate), margins entire. |
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. |
Racemes | lax, slightly elongated in fruit, (flower buds oblong-linear). |
corymbose, somewhat lax, considerably elongated in fruit. |
Flowers | 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. |
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. |
Fruiting pedicels | horizontal to divaricate, usually straight, rarely slightly incurved, slender, (2.5–)3–5.5(–6.5) mm, slightly flattened at base. |
often divaricate, sometimes reflexed, rarely horizontal or divaricate-ascending, straight, slender, (4–)5–13(–19) mm, somewhat flattened at base. |
Fruits | 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. |
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. |
Seeds | 0.7–1.5 × 0.5–0.8 mm. |
(oblong), (1–)1.3–1.8(–2) × 0.5–1 mm. |
Thelypodium eucosmum |
Thelypodium laxiflorum |
|
Phenology | Flowering May–Jul. | Flowering May–Sep. |
Habitat | Shady slopes and canyons, pinyon-juniper and oak woodland communities, stream beds, streamsides | Talus, rocky slopes, cliffs, pinyon-juniper-brush communities |
Elevation | 700-1000 m (2300-3300 ft) | 1500-3100 m (4900-10200 ft) |
Distribution |
OR
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CO; NV; UT
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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.) |
|
Source | FNA vol. 7, p. 731. | FNA vol. 7, p. 735. |
Parent taxa | Brassicaceae > tribe Thelypodieae > Thelypodium | Brassicaceae > tribe Thelypodieae > Thelypodium |
Sibling taxa | ||
Synonyms | Stanleyella wrightii var. tenella, T. wrightii var. tenellum | |
Name authority | B. L. Robinson: in A. Gray et al., Syn. Fl. N. Amer. 1(1,1): 175. (1895) | Al-Shehbaz: Contr. Gray Herb. 204: 129, plate 22A. (1973) |
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