Zigadenus nuttallii |
Zigadenus micranthus |
|
---|---|---|
Nuttall's death camas |
small-flower death camas |
|
Habit | Plants 3–7.5 dm, from bulbs; bulbs not clumped, tunicate, ovoid, 15–40 × 9–35 mm. | Plants 1–7 dm, from bulbs; bulbs not clumped, tunicate, ovoid, 10–35 × 8–30 mm. |
Leaves | proximal blades 15–45 cm × 3–15 mm. |
proximal blades 12–45 cm × 2–10 mm. |
Inflorescences | usually paniculate, 20–60-flowered, with 1–8 branches, narrow, terminal raceme pyramidal in early anthesis, 3–30 × 3–7 cm, proximal branches 1/10–1/2 length of entire inflorescence, ascending at 10°–60° angle. |
usually paniculate with 1–5 branches, occasionally racemose, 10–60-flowered, narrow, terminal raceme often pyramidal in early anthesis, 3–40 × 3–7 cm, proximal branches 2–13 cm, 1/10–1/2 length of entire inflorescence, diverging from main axis at 60°–90° when in fruit. |
Flowers | perianth hypogynous, campanulate, 10–15 mm diam.; tepals persistent in fruit, cream colored, ovate, 3–8 × 1–4 mm, outer unclawed or rarely clawed to 5 mm, apex usually obtuse; gland 1, obovate, distal margins obscure, thin; filaments straight, usually equaling tepals, occasionally longer, thickened proximally; pedicel usually ascending in fruit, occasionally perpendicular to stem, 10–35 mm, bracts green, somewhat falcate, 3–20 mm. |
perianth hypogynous, campanulate, 5–12 mm diam.; tepals persistent in fruit, cream colored, 3–8 × 1–4 mm, outer sometimes with basal claw to 5 mm, usually with acute apex; gland 1, obovate, distal margins evident, dentate; filaments straight, ± equaling tepals or rarely longer, thickened proximally; pedicel usually perpendicular to stem in flower and in fruit, 12–40 mm, bracts white and membranous to green and foliaceous, narrowly lanceolate, 5–40 mm. |
Capsules | 8–16 × 3–8 mm. |
6–18 × 2–7 mm. |
2n | = 32. |
= 22. |
Zigadenus nuttallii |
Zigadenus micranthus |
|
Phenology | Flowering Mar–Jun. | Flowering Apr–Jul. |
Habitat | Tallgrass prairie, calcareous glades, rocky hillsides | Serpentine hillsides |
Elevation | 500–1200 m (1600–3900 ft) | 0–1000 m (0–3300 ft) |
Distribution |
AR; KS; MO; OK; TX
|
CA; OR
|
Source | FNA vol. 26, p. 86. | FNA vol. 26. |
Parent taxa | Liliaceae > Zigadenus | Liliaceae > Zigadenus |
Sibling taxa | ||
Synonyms | Amianthium nuttallii, Toxicoscordion nuttallii, Toxicoscordion texense, Z. texensis | Toxicoscordion micranthum, Z. venenosus var. micranthus |
Name authority | (A. Gray) S. Watson: Botany (Fortieth Parallel), 343. (1871) | Eastwood: Bull. Torrey Bot. Club 30: 483. (1903) |
Web links |