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Vascular Plants of California
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Calochortus westonii
SHIRLEY MEADOWS STAR-TULIP


Higher Taxonomy
Family: LiliaceaeView DescriptionDichotomous Key
Common Name: LILY FAMILY
Habit: Perennial herb from membranous bulb or scaly rhizome. Stem: underground or erect, branched or not. Leaf: basal or cauline, alternate, subopposite, or whorled. Inflorescence: raceme, panicle, +- umbel-like or not. Flower: perianth parts 6 in 2 generally petal-like whorls, often showy; stamens 3 or 6, filaments free or +- fused to perianth, anthers attached at base or near middle; ovary superior or +- so, style 1, entire or 3-lobed. Fruit: capsule or berry. Seed: 3--many, flat or angled, brown to black.
Genera In Family: 16 genera, 635 species: northern temperate. Note: Users strongly encouraged to protect plants by working around need to see underground parts in using keys, e.g., by trying both leads in couplets solely dependent on such characters. Muscari botryoides (L.) Mill. an historical waif in California. Other TJM (1993) taxa moved to Agavaceae (Agave, Camassia, Chlorogalum, Hastingsia, Hesperocallis, Hesperoyucca, Leucocrinum, Yucca), Alliaceae (Allium, Ipheion, Nothoscordum), Amaryllidaceae (Amaryllis, Narcissus, Pancratium), Asparagaceae (Asparagus), Asphodelaceae (Aloe, Asphodelus, Kniphofia), Melanthiaceae (Pseudotrillium, Stenanthium, Toxicoscordion, Trillium, Veratrum, Xerophyllum), Nartheciaceae (Narthecium), Ruscaceae (Maianthemum, Nolina), Smilacaceae (Smilax), Tecophilaeaceae (Odontostomum), Themidaceae (Androstephium, Bloomeria, Brodiaea, Dichelostemma, Muilla, Triteleia), and Tofieldiaceae (Triantha). North American species of Disporum now in Prosartes.
eFlora Treatment Author: Dale W. McNeal, except as noted
Scientific Editor: Dale W. McNeal, Thomas J. Rosatti.
Genus: CalochortusView DescriptionDichotomous Key


Habit: Bulb coat generally membranous, occasionally fibrous. Stem: scapose or leafy, generally erect, generally branched, bulblets in axils of lower leaves or 0. Leaf: generally linear to lanceolate; basal leaf 1, persistent or not; cauline leaves 0--several, occasionally appearing basal, generally smaller upward, withering or not. Inflorescence: often +- umbel-like; flowers 2--many; bracts 0--several, generally opposite, often paired. Flower: perianth +- closed, spheric to oblong, or open, bell-shaped or +- rotate; sepals generally < petals, generally +- lanceolate (ovate), generally +- glabrous; petals generally widely wedge-shaped, occasionally clawed, generally hairy adaxially, nectary near base; stamens 6, filaments +- flat, often dilated at base, anthers generally attached at base or appearing so; style 1, stigmas 3. Fruit: capsule, septicidal; oblong or linear, generally 3-angled or -winged, chambers 3. Seed: many in 2 rows per chamber, flat, generally +- tan or +- yellow, translucent, or irregular dark brown, often net-like.
Etymology: (Greek: beautiful grass) Note: Bulbs of some eaten by Native Americans. Many taxa variable, difficult to key.
eFlora Treatment Author: Peggy L. Fiedler
Unabridged Reference: Patterson & Givnish 2003 New Phytologist 161:253--264
Calochortus westonii Eastw.
NATIVE
Stem: 3--15 cm, simple, slender. Leaf: basal 10--20 cm, persistent; cauline 0. Inflorescence: flowers 1--10, spreading to erect. Flower: perianth bell-shaped; sepals +- 10 mm; petals 8--12 mm, +- blue, lanceolate, not ciliate near tip, sparsely hairy, nectary +- depressed, bordered below by ciliate membranes, above by short hairs; filaments +- 4 mm, +- dilated below, anthers sharp-tipped, white to lilac. Fruit: nodding, 10--15 mm, angled. Seed: irregular.
Ecology: Meadows, open woodland; Elevation: +- 1500--2000 m. Bioregional Distribution: s SNH (Greenhorn Mtns). Flowering Time: May--Jun
Synonyms: Calochortus coeruleus (Kellogg) S. Watson var. westonii (Eastw.) Ownbey
Jepson eFlora Author: Peggy L. Fiedler
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)
Listed on CNPS Rare Plant Inventory

Previous taxon: Calochortus weedii var. weedii
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Botanical illustration including Calochortus westonii

botanical illustration including Calochortus westonii

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Citation for this treatment: Peggy L. Fiedler 2012, Calochortus westonii, in Jepson Flora Project (eds.) Jepson eFlora, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=16775, accessed on April 19, 2024.

Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on April 19, 2024.

Calochortus westonii
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©2020 Chris Winchell
Calochortus westonii
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©2020 Chris Winchell
Calochortus westonii
click for enlargement
©2020 Chris Winchell
Calochortus westonii
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©2008 Gary A. Monroe
Calochortus westonii
click for enlargement
©2020 Chris Winchell

More photos of Calochortus westonii
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Geographic subdivisions for Calochortus westonii:
s SNH (Greenhorn Mtns).
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map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).





 

Data provided by the participants of the  Consortium of California Herbaria.
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All markers link to CCH specimen records. The original determination is shown in the popup window.
Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time (fruiting time in some monocot genera).