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Mount Diablo fairy-lantern, Mt. Diablo fairy-lantern

Calochortus howellii

Howell's mariposa lily

Stems

usually branching distal to base, 1–3 dm, not glaucous.

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

Leaves

basal persistent, 1–4 dm;

blade green, lanceolate, tapering at base, flat, not glaucous.

basal persistent, 20–35 cm;

blade gradually tapering distally, adaxially pubescent.

Inflorescences

1–5-flowered.

subumbellate, 1–3-flowered;

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

Flowers

nodding;

perianth closed at apex, ± globular;

sepals spreading, yellow-green, ovate to lanceolate, 2–3 cm, glabrous, apex acuminate;

petals pale yellow, lanceolate, 3–5 cm, conspicuously fringed with short, thick hairs, adaxial surface glabrous or sparsely hairy, apex obtuse;

glands deeply depressed, bordered distally by long, slender hairs;

filaments 6–8 mm;

anthers oblong, 3–5 mm, apex obtuse or acute.

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.

Capsules

nodding, winged, ellipsoid-oblong, 2–4 cm.

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

Seeds

dark brown, irregular.

light-colored, irregular.

2n

= 20.

= 20.

Calochortus pulchellus

Calochortus howellii

Phenology Flowering late spring–early summer. Flowering late spring–mid summer.
Habitat Open places in woods, chaparral, typically on serpentine Dry, rocky, serpentine soils
Elevation 200–800 m (700–2600 ft) 300–500 m (1000–1600 ft)
Distribution
from FNA
CA
[BONAP county map]
from FNA
OR
[WildflowerSearch map]
[BONAP county map]
Discussion

Of conservation concern.

Calochortus pulchellus is known from Mt. Diablo, Contra Costa County.

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

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

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

Source FNA vol. 26, p. 123. FNA vol. 26, p. 129.
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. nudus, C. nuttallii, C. obispoensis, C. palmeri, C. panamintensis, C. persistens, C. plummerae, 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. 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
Synonyms Cyclobothra pulchella
Name authority (Bentham) Alph. Wood: Proc. Acad. Nat. Sci. Philadelphia 20: 168. (1868) S. Watson: Proc. Amer. Acad. Arts 23: 266. (1888)
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