Flora of North America species comparison

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Calochortus clavatus

Calochortus nuttallii

club hair mariposa, clubhair mariposa lily, slender mariposa lily

sego-lily
Habit Plants usually bulbose; bulb coat, when present, membranous. Plants usually bulbose; bulb coat, when present, membranous.
Stems

slender or coarse, stout, branching or not, strongly flexuous, 3–10 dm.

usually not branching or twisted, straight, 1.5–4.5 dm.
Leaves

basal withering, 1–2 dm;

blade linear.

blade linear, becoming involute;

basal withering.
Inflorescences

subumbellate, 1–6-flowered;

bracts 4–8 cm, bases dilated.

subumbellate, 1–4-flowered;

bracts congested, unequal.
Flowers

erect;

perianth open, cup-shaped;

sepals usually with red-brown blotch at base, lanceolate-ovate, 2–4 cm, apex acute;

petals lemon to golden yellow, with transverse line distal to gland, broadly cuneate to obovate, 3–5 cm;

glands round, deeply depressed, densely covered with short hairs with branching, coralline tips, surrounded by conspicuously fringed membrane and club-shaped hairs;

filaments ca. 10 mm;

anthers purplish brown, oblong, 4–10 mm.

erect;

perianth open, campanulate;

sepals marked similar to petals, usually shorter, lanceolate, glabrous, apex acuminate;

petals white, tinged with lilac or infrequently magenta, yellow at base, with reddish brown or purple band or blotch distal to gland, broadly obovate, cuneate, sparsely invested near gland with slender hairs, apex usually short-acuminate;

glands round, depressed, surrounded by conspicuously fringed membrane, densely covered with short, unbranched or distally branching hairs;

filaments ca. equaling anthers;

anthers yellowish or pinkish, oblong, apex obtuse.
Capsules

erect, lanceoloid-linear, angled, 6–9 cm, apex acuminate.

erect, linear-lanceoloid, 3-angled, apex acuminate.
Seeds

light yellow, translucent, flat.

flat.
2n

= 16.

= 16.

Calochortus clavatus

Calochortus nuttallii
Phenology Flowering late spring–late summer.
Habitat Dry soils
Elevation 700–3300 m (2300–10800 ft)
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; CO; ID; MT; ND; NE; NM; NV; SD; UT; WY
[WildflowerSearch map]
[BONAP county map]
Discussion

Varieties 5 (5 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Key
1. Petals shorter than sepals; petal glands very deeply depressed.
var. avius
1. Petals longer than sepals; petal glands shallowly to moderately depressed.
→ 2
2. Stems straight, slender, usually 3 dm or shorter.
→ 2
2. Stems flexuous, coarse, usually 5–10 dm.
→ 3
3. Petals 3–4 cm, sparsely bearded; leaves not recurved.
var. gracilis
3. Petals 4–5 cm, bearded; leaves strongly recurved.
var. recurvifolius
4. Petals deep yellow, hairs very knobby; anthers deep purple.
var. clavatus
4. Petals light yellow, hairs not very knobby; anthers yellow to medium purple.
var. pallidus
Source FNA vol. 26, p. 138. FNA vol. 26, p. 136.
Parent taxa Liliaceae > Calochortus Liliaceae > Calochortus
Sibling taxa
C. albus, C. amabilis, C. ambiguus, C. amoenus, C. apiculatus, C. argillosus, C. aureus, C. bruneaunis, C. catalinae, C. coeruleus, C. concolor, C. coxii, C. dunnii, C. elegans, C. eurycarpus, C. excavatus, C. flexuosus, C. greenei, C. gunnisonii, C. howellii, C. indecorus, C. invenustus, C. kennedyi, C. leichtlinii, C. longebarbatus, C. luteus, C. lyallii, C. macrocarpus, C. minimus, C. monanthus, C. monophyllus, C. nitidus, C. nudus, C. nuttallii, C. obispoensis, C. palmeri, C. panamintensis, C. persistens, C. plummerae, C. pulchellus, C. raichei, C. simulans, C. splendens, C. striatus, C. subalpinus, C. superbus, C. tiburonensis, C. tolmiei, C. umbellatus, C. umpquaensis, C. uniflorus, C. venustus, C. vestae, C. weedii, C. westonii
C. albus, C. amabilis, C. ambiguus, C. amoenus, C. apiculatus, C. argillosus, C. aureus, C. bruneaunis, C. catalinae, C. clavatus, C. coeruleus, C. concolor, C. coxii, C. dunnii, C. elegans, C. eurycarpus, C. excavatus, C. flexuosus, C. greenei, C. gunnisonii, C. howellii, C. indecorus, C. invenustus, C. kennedyi, C. leichtlinii, C. longebarbatus, C. luteus, C. lyallii, C. macrocarpus, C. minimus, C. monanthus, C. monophyllus, C. nitidus, C. nudus, C. obispoensis, C. palmeri, C. panamintensis, C. persistens, C. plummerae, C. pulchellus, C. raichei, C. simulans, C. splendens, C. striatus, C. subalpinus, C. superbus, C. tiburonensis, C. tolmiei, C. umbellatus, C. umpquaensis, C. uniflorus, C. venustus, C. vestae, C. weedii, C. westonii
Subordinate taxa
C. clavatus var. avius, C. clavatus var. clavatus, C. clavatus var. gracilis, C. clavatus var. pallidus, C. clavatus var. recurvifolius
Synonyms Mariposa clavata
Name authority S. Watson: Proc. Amer. Acad. Arts 14: 265. (1879) Torrey: in H. Stansbury, Exped. Great Salt Lake, 397. (1852)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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