Zigadenus vaginatus |
Zigadenus paniculatus |
|
---|---|---|
sheath death camas |
foothill death camas, sand-corn |
|
Habit | Plants 4–6 dm, from bulbs; bulbs not clumped, tunicate, narrowly ovoid, 3–6 × 1.5–3 cm. | Plants 2–7 dm, from bulbs; bulbs not clumped, tunicate, ovoid, 18–40 × 12–35 mm. |
Stems | with persistent leaf bases proximally. |
|
Leaves | proximal blades 25–40 cm × 5–12 mm. |
proximal blades 15–35 cm × 3–15 mm. |
Inflorescences | paniculate, 15–30-flowered, with 1–4 branches, 1.5–3 dm × 3–6 cm, proximal branches 7–8 cm. |
paniculate, 10–80-flowered, narrow, terminal raceme pyramidal in anthesis, 2–30 × 2–4 cm, proximal branches usually less than 6 cm, 1/10–1/2 length of entire inflorescence, diverging from main axis at 10°–60° when in fruit. |
Flowers | perianth perigynous, rotate to rotate-campanulate, 10–15 mm diam.; tepals white, ovate, 3–6 × 3–4 mm, somewhat narrowed at base, apex broadly rounded; gland 1, obcordate, thick; pedicel ascending at anthesis, 1–1.5 cm, bracts often streaked with purple, ovate, 3–6 mm. |
perianth hypogynous, campanulate, 5–10 mm diam.; tepals persistent in fruit, cream colored, ovate, 2–5 × 1–4 mm, outer usually not clawed, apex usually acute; gland 1, obovate, distal margins evident to obscure, irregular; filaments straight, usually equaling tepals, occasionally longer, thickened proximally; pedicel ascending to perpendicular to stem in fruit, 3–25 mm, bracts green, lanceolate, 5–15 mm. |
Capsules | narrowly conic, 7–8 mm. |
5–20 × 3–8 mm. |
2n | = 32. |
= 22. |
Zigadenus vaginatus |
Zigadenus paniculatus |
|
Phenology | Flowering Aug. | Flowering Apr–Jun. |
Habitat | Wet sandstone ledges of canyons, “hanging garden” community | Sagebrush desert, dry open inland grasslands |
Elevation | 1100–1900 m (3600–6200 ft) | 1300–2600 m (4300–8500 ft) |
Distribution |
CO; UT
|
AZ; CA; CO; ID; MT; NM; NV; OR; UT; WA; WY
|
Discussion | Of conservation concern. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 26, p. 87. | FNA vol. 26, p. 85. |
Parent taxa | Liliaceae > Zigadenus | Liliaceae > Zigadenus |
Sibling taxa | ||
Synonyms | Anticlea vaginata | Helonias paniculata, Toxicoscordion paniculatum |
Name authority | (Rydberg) J. F. Macbride: Contr. Gray Herb. 53: 4. (1918) | (Nuttall) S. Watson: Botany (Fortieth Parallel), 343. (1871) |
Web links |