Flora of North America species comparison

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Calochortus howellii

Calochortus westonii
Calochortus howellii

Howell's mariposa lily

mariposa-lily, Shirley Meadows mariposa lily, Shirley Meadows star-tulip
Stems

slender, not branching or rarely branching in axil of cauline leaf, straight, 2–4 dm.

slender and delicate, not branching, 3–15 cm.
Leaves

basal persistent, 20–35 cm;

blade gradually tapering distally, adaxially pubescent.

basal persistent, 1–2 dm;

blade linear, flat.
Inflorescences

subumbellate, 1–3-flowered;

bracts 2, subopposite, linear to narrowly lanceolate, attenuate, 1–3 cm.

1–12-flowered.
Flowers

erect;

perianth open, campanulate;

sepals shorter than petals, ovate-acuminate, glabrous;

petals yellowish white, with purplish hairs toward base, broadly obovate, cuneate, inconspicuously fringed laterally, sparingly short-hairy adaxially, apex rounded;

glands transversely oblong, slightly depressed, densely covered with short, distally branching hairs, the bases of which unite at lower margin to form inconspicuous, discontinuous membranes;

filaments shorter than anthers;

anthers oblong-lanceolate, apex acute to short-apiculate.

erect to spreading;

perianth open, campanulate;

sepals ca. 10 mm;

petals white to light blue, lanceolate, 8–12 mm, ciliate only on margins, adaxial surface hairy only distal to gland, apex acute;

glands slightly depressed, bordered proximally by ciliate membrane, distally by short hairs;

anther apex acute to acuminate.
Capsules

erect, 3-winged, ellipsoid, ca. 2 cm, base and apex acute.

nodding, angled, 1–2 cm, apex acute.
Seeds

light-colored, irregular.

irregular.
2n

= 20.

Calochortus howellii

Calochortus westonii
Phenology Flowering late spring–mid summer. Flowering late spring.
Habitat Dry, rocky, serpentine soils Open places in woods, meadows
Elevation 300–500 m (1000–1600 ft) 1500–2000 m (4900–6600 ft)
Distribution
from FNA
OR
[WildflowerSearch map]
[BONAP county map]
from FNA
CA
[BONAP county map]
Discussion

Calochortus howellii is known only from the Illinois River valley, Josephine County.

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

Of conservation concern.

Calochortus westonii is known from the Greenhorn Mountains, Kern and Tulare counties.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 26, p. 129. FNA vol. 26, p. 125.
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. 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. 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
Synonyms C. coeruleus var. westonii
Name authority S. Watson: Proc. Amer. Acad. Arts 23: 266. (1888) Eastwood: Proc. Calif. Acad. Sci., ser. 4, 20: 136. (1931)
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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