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Nuttall's death camas

sheath death camas

Habit Plants 3–7.5 dm, from bulbs; bulbs not clumped, tunicate, ovoid, 15–40 × 9–35 mm. Plants 4–6 dm, from bulbs; bulbs not clumped, tunicate, narrowly ovoid, 3–6 × 1.5–3 cm.
Stems

with persistent leaf bases proximally.

Leaves

proximal blades 15–45 cm × 3–15 mm.

proximal blades 25–40 cm × 5–12 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.

paniculate, 15–30-flowered, with 1–4 branches, 1.5–3 dm × 3–6 cm, proximal branches 7–8 cm.

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 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.

Capsules

8–16 × 3–8 mm.

narrowly conic, 7–8 mm.

2n

= 32.

= 32.

Zigadenus nuttallii

Zigadenus vaginatus

Phenology Flowering Mar–Jun. Flowering Aug.
Habitat Tallgrass prairie, calcareous glades, rocky hillsides Wet sandstone ledges of canyons, “hanging garden” community
Elevation 500–1200 m (1600–3900 ft) 1100–1900 m (3600–6200 ft)
Distribution
from FNA
AR; KS; MO; OK; TX
[WildflowerSearch map]
from FNA
CO; UT
[WildflowerSearch map]
Discussion

Of conservation concern.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 26, p. 86. FNA vol. 26, p. 87.
Parent taxa Liliaceae > Zigadenus Liliaceae > Zigadenus
Sibling taxa
Z. brevibracteatus, Z. densus, Z. elegans, Z. exaltatus, Z. fontanus, Z. fremontii, Z. glaberrimus, Z. micranthus, Z. mogollonensis, Z. paniculatus, Z. vaginatus, Z. venenosus, Z. virescens
Z. brevibracteatus, Z. densus, Z. elegans, Z. exaltatus, Z. fontanus, Z. fremontii, Z. glaberrimus, Z. micranthus, Z. mogollonensis, Z. nuttallii, Z. paniculatus, Z. venenosus, Z. virescens
Synonyms Amianthium nuttallii, Toxicoscordion nuttallii, Toxicoscordion texense, Z. texensis Anticlea vaginata
Name authority (A. Gray) S. Watson: Botany (Fortieth Parallel), 343. (1871) (Rydberg) J. F. Macbride: Contr. Gray Herb. 53: 4. (1918)
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