Flora of North America species comparison

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Calochortus nudus

Calochortus umpquaensis

naked mariposa lily, naked star tulip, Shasta star-tulip
Calochortus umpquaensis

Umpqua mariposa-lily
Stems

usually not branching, 1–3 dm.

not branching, straight, often scapelike, 2–3 dm, glabrous or glaucous.
Leaves

basal persistent, 0.5–2 dm;

blade lanceolate, tapering at base, flat, glabrous adaxially.

basal solitary, clasping;

blade narrowly lanceolate, hairy, adaxially hispid, abaxially glabrous, sometimes glaucous. Inflorescences 1–several-flowered;

bracts 2, suboppo-site, narrowly lanceolate.
Inflorescences

1–several-flowered.

Flowers

erect;

perianth open, campanulate;

sepals lanceolate, 10–12 mm, glabrous, apex acuminate;

petals pale lavender, widely obovate, 14–16 mm, adaxial surface ± glabrous, not ciliate;

glands not deeply depressed, bordered proximally by wide, ciliate membranes;

anthers linear-oblong, apex obtuse or acute.

erect;

perianth open, campanulate;

sepals lanceolate-acuminate, ca. 2 cm;

petals white to cream, with dark purple-black, pentagonal to lunate blotch, broadly oblong to obovate, 3.5 cm, bearded, adaxial surface typically minutely papillose, margins erose;

glands transversely oblong-lunate, slightly depressed, with 0.7–1.4 mm-wide band of short dendritic hairs distally, hairs surrounded by lime-green coloration and purple striations;

anthers lanceolate, apex acuminate.
Capsules

erect, 3-winged, 1–2 cm.

nodding, 3–5.4 cm.
Seeds

light brown, irregular.

2.8–3.5 mm, with inflated bulbous crest and hollow lateral ridge.
2n

= 20.

= 20.

Calochortus nudus

Calochortus umpquaensis
Phenology Flowering late spring–mid summer. Flowering late spring–mid summer.
Habitat Moist grassy areas, meadows, lake and bog margins Grassland-forest ecotones in serpentine-derived soils
Elevation 1200–2500 m (3900–8200 ft) 300–500 m (1000–1600 ft)
Distribution
from FNA
CA; OR
[WildflowerSearch map]
[BONAP county map]
from FNA
OR
[WildflowerSearch map]
[BONAP county map]
Discussion

Calochortus nudus hybridizes with C. minimus.

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

Of conservation concern.

Calochortus umpquaensis is known only from Watson and Ace Williams mountains on both sides of the Little River, Douglas County.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 26, p. 128. FNA vol. 26, p. 130.
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. 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. 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. 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. uniflorus, C. venustus, C. vestae, C. weedii, C. westonii
Synonyms C. nudus var. shastensis, C. shastensis
Name authority S. Watson: Proc. Amer. Acad. Arts 14: 263. (1879) Fredricks: Syst. Bot. 14: 12, figs. 1, 2, 3f–j, 4, 5. (1989)
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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