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Microsteris gracilis

Higher Taxonomy
Family: PolemoniaceaeView DescriptionDichotomous Key

Habit: Annual, perennial herb, shrub, vine. Leaf: simple or compound, cauline (or most basal), alternate or opposite; stipules 0. Inflorescence: cymes, heads, clusters, or flower 1; bracts in involucres or not. Flower: sepals generally 5, fused at base, translucent membrane generally connecting lobes, torn by fruit; corolla generally 5-lobed, radial or bilateral, salverform to bell-shaped, throat often well defined; stamens generally 5, epipetalous, attached at >= 1 level, filaments of >= 1 length, pollen white, yellow, blue, or red; ovary superior, chambers generally 3, style 1, stigmas generally 3. Fruit: capsule. Seed: 1--many, when wetted swelling or not, gelatinous or not.
Genera In Family: 26 genera, 314 species: America, northern Europe, northern Asia; some cultivated (Cantua, Cobaea (cup-and-saucer vine), Collomia, Gilia, Ipomopsis, Linanthus, Phlox). Note: Leptodactylon moved to Linanthus.
eFlora Treatment Author: Robert Patterson, family description, key to genera, except as noted
Scientific Editor: Robert Patterson, Thomas J. Rosatti.
Genus: MicrosterisView Description 

Species In Genus: 1 sp. Etymology: (Greek: small, to support, presumably referring to small size)
eFlora Treatment Author: Robert Patterson & Carolyn J. Ferguson

Microsteris gracilis (Hook.) Greene
Habit: Annual; generally glandular-hairy above. Stem: erect and simple to decumbent and much-branched, < 20 cm. Leaf: opposite below, often alternate above, 10--30 mm, oblanceolate to lanceolate. Flower: calyx 5--10 mm, membrane narrower than lobes; corolla tube 8--12 mm, +- yellow, lobes 1--2 mm, generally truncate or notched, bright pink (base white or not) to white; stamens, style included. Chromosomes: 2n=14.
Ecology: Dry to moist areas; Elevation: < 3300 m. Bioregional Distribution: CA; Distribution Outside California: to British Columbia, Montana, Colorado, Mexico; also in South America. Flowering Time: Mar--Aug Note: Subspecies, varieties have been recognized; study needed.
Synonyms: Microsteris gracilis subsp. gracilis; Microsteris gracilis var. gracilis; Microsteris gracilis subsp. humilis (Greene) V.E. Grant; Microsteris gracilis subsp. humilior (Greene) H. Mason, ined.; Microsteris gracilis subsp. humilior (Greene) H. Mason, ined.; Microsteris gracilis var. humilior (Hook.) Cronquist; Phlox gracilis (Hook.) Greene
eFlora Treatment Author: Robert Patterson & Carolyn J. Ferguson
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botanical illustration including Microsteris gracilis


Citation for this treatment: Robert Patterson & Carolyn J. Ferguson 2017. Microsteris gracilis, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on October 17, 2017.

Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora,, accessed on October 17, 2017.

Microsteris gracilis
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© 2017 Aaron Schusteff
Microsteris gracilis
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© 2016 Steve Matson
Microsteris gracilis
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© 2016 Aaron Schusteff
Microsteris gracilis var. gracilis
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© 2013 Gary A. Monroe
Microsteris gracilis
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© 2003 Steve Matson
Microsteris gracilis
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© 2007 George W. Hartwell

More photos of Microsteris gracilis in CalPhotos

Geographic subdivisions for Microsteris gracilis:
Markers link to CCH specimen records. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues. Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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).

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Data provided by the participants of the Consortium of California Herbaria.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.