Flora of North America species comparison

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Calochortus howellii

Calochortus invenustus
Calochortus howellii

Howell's mariposa lily

plain mariposa, plain mariposa lily
Habit Plants usually bulbose; bulb coat, when present, membranous.
Stems

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

slender, usually not branching or twisted, 2–5 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, 1–5-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 lanceolate-ovate, 2–3 cm, apex acuminate;

petals white or dull lavender to purplish, with longitudinal median green stripe on adaxial surface and sometimes purplish blotch proximal to gland, cuneate to obovate, 2–4 cm, with a few short hairs near gland, apex obtuse to apiculate;

glands ± round, slightly depressed, small, surrounded by conspicuously fringed membrane, densely covered with short, distally branching hairs;

filaments 6–7 mm;

anthers purplish or yellowish, oblong, 7–8 mm, apex obtuse.
Capsules

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

erect, lanceoloid-linear, angled, 5–7 cm, apex acute.
Seeds

light-colored, irregular.

flat.
2n

= 20.

= 14.

Calochortus howellii

Calochortus invenustus
Phenology Flowering late spring–mid summer. Flowering late spring–late summer.
Habitat Dry, rocky, serpentine soils Dry soil, usually granitic, usually in montane coniferous forests
Elevation 300–500 m [1000–1600 ft] 1500–3000 m [4900–9800 ft]
Distribution
from FNA
OR
[WildflowerSearch map]
[BONAP county map]
from FNA
CA
[WildflowerSearch map]
[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. 137.
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. 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
Name authority S. Watson: Proc. Amer. Acad. Arts 23: 266. (1888) Greene: Pittonia 2: 71. (1890)
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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