Flora of North America species comparison

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Calochortus howellii

Calochortus vestae
Calochortus howellii

Howell's mariposa lily

Coast Range mariposa lily
Habit Plants strongly bulbose; bulb coat membranous.
Stems

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

usually branching, straight, 3–5 dm.
Leaves

basal persistent, 20–35 cm;

blade gradually tapering distally, adaxially pubescent.

basal withering, 1–2 dm;

blade linear.
Inflorescences

subumbellate, 1–3-flowered;

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

subumbellate, 1–3-flowered;

bracts 2–5 cm.
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;

perianth open, campanulate;

sepals linear-lanceolate, attenuate, 2–3 cm;

petals white to purplish, streaked red to purple proximal to gland, with median red-brown blotch surrounded by pale yellow zone, cuneate to obovate, 3–4 cm, with a few short hairs near gland, apex rounded;

glands ± doubly lunate, not depressed, densely covered with short hairs;

filaments equaling anthers;

anthers oblong-linear, apex obtuse or acute.
Capsules

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

erect, linear, angled, 4–7 cm, apex acute.
Seeds

light-colored, irregular.

light beige, flat, 4–6 mm.
2n

= 20.

= 28.

Calochortus howellii

Calochortus vestae
Phenology Flowering late spring–mid summer. Flowering late spring–mid summer.
Habitat Dry, rocky, serpentine soils Heavy clay soils in mixed evergreen and pine forests
Elevation 300–500 m (1000–1600 ft) 500–900 m (1600–3000 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.)
Source FNA vol. 26, p. 129. FNA vol. 26, p. 135.
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. weedii, C. westonii
Name authority S. Watson: Proc. Amer. Acad. Arts 23: 266. (1888) Purdy: Gard. Chron., ser. 3, 18: 14. (1895)
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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