Jepson eFlora: Taxon page
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Lathrocasis tenerrima

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: LathrocasisView Description 

Species In Genus: 1 sp. Etymology: (Latin: hidden sister)
eFlora Treatment Author: Leigh A. Johnson

Lathrocasis tenerrima (A. Gray) L.A. Johnson
Habit: Annual, open, stalked-glandular. Stem: 3--35 cm, erect, thread-like, branched. Leaf: alternate, 0.5--4 cm, lanceolate to oblanceolate, entire (1--2 lobed), reduced upward. Inflorescence: loose, flowers 1, bract-opposed; pedicels spreading or recurved in fruit. Flower: calyx 1--2 mm, lobe margins membranous to tip, fused 0.6--0.8 × length; corolla 1.5--3.5 mm, tube, throat white, yellow spotted, included, lobes white to lavender or +- blue; stamens attached at mid corolla; stamens, style +- exserted; pollen white. Fruit: 1--3 mm, +- spheric, valves spreading, detaching. Seed: 1 per chamber, gelatinous when wet. Chromosomes: 2n=36.
Ecology: Sandy, gravelly slopes; Elevation: 1100--3000 m. Bioregional Distribution: SNE; Distribution Outside California: Oregon to Montana, Colorado. Flowering Time: May--Sep
Synonyms: Gilia tenerrima A. Gray
eFlora Treatment Author: Leigh A. Johnson
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botanical illustration including Lathrocasis tenerrima


Citation for this treatment: Leigh A. Johnson 2017. Lathrocasis tenerrima, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on April 29, 2017.

Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora,, accessed on April 29, 2017.

Geographic subdivisions for Lathrocasis tenerrima:
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).

View elevation by latitude chart
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.