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Leptosiphon croceus

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: LeptosiphonView DescriptionDichotomous Key

Habit: Annual, perennial herb. Stem: generally erect, generally branched from base. Leaf: cauline, opposite, entire or lobes 3--9, palmate, linear to narrowly lanceolate or spoon-shaped, generally not fused by membrane. Inflorescence: head, open clusters, few-flowered cyme, or flower 1; bracts +- leaf-like, generally palmate-lobed, lobes generally not connected by translucent membrane; flowers sessile or not. Flower: sepals generally equal; corolla funnel-shaped, salverform, or bell-shaped, with hairy ring inside tube or generally not (determined at 10×); stamens attached at 1 level, pollen yellow.
Species In Genus: 30 species: western North America, Chile. Etymology: (Greek: narrow tube, for corollas of some species) Note: Calyx lobe membrane generally expressed as length relative to calyx or lobe length, or as width relative to calyx lobe.
eFlora Treatment Author: Robert Patterson & Robyn Battaglia
Reference: Battaglia & Patterson 2001 Madroño 48:62--78

Leptosiphon croceus (Eastw.) Strother & Kersh
Habit: Annual, hairy. Stem: much-branched from base, 2--7 cm, internodes short. Leaf: lobes 4--7 mm, narrowly obovate, +- thickened, middle lobe rounded. Inflorescence: heads. Flower: calyx 6--11 mm, lobes generally deltate, 1 mm wide at middle, densely glandular-hairy, membrane obscure; corolla salverform, tube 26--39 mm, yellow to +- red, throat yellow-orange, lobes 6--8 mm, obovate, rounded, bright yellow, generally with 2 red spots at base; stamens exserted; stigmas 2--5 mm. Chromosomes: 2n=18.
Ecology: Local, open, grassy areas, coastal bluffs; Elevation: +- 0 m. Bioregional Distribution: n CCo (Montara, San Mateo Co.). Flowering Time: Apr--May Note: The combination Leptosiphon croceus (Eastw.) J.M. Porter & L.A. Johnson is not considered to have been validly published because the place of publication of the basionym was incorrectly cited by Porter & Johnson, a situation corrected by Strother & Kersh (Phytoneuron 2016-21: 1-2).
Synonyms: Linanthus croceus Eastw.;
eFlora Treatment Author: Robert Patterson & Robyn Battaglia
Reference: Battaglia & Patterson 2001 Madroño 48:62--78
Jepson Online Interchange
Listed on CNPS Rare Plant Inventory

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Citation for this treatment: Robert Patterson & Robyn Battaglia 2012, Leptosiphon croceus, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on July 19, 2018.

Citation for the whole project: Jepson Flora Project (eds.) 2018, Jepson eFlora,, accessed on July 19, 2018.

Leptosiphon croceus
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© 2006 Aaron Schusteff
Leptosiphon croceus
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© 2006 Aaron Schusteff
Leptosiphon croceus
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© Bob Patterson and CNPS
Leptosiphon croceus
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© 2016 Aaron Schusteff
Leptosiphon croceus
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© 2012 Aaron Schusteff
Leptosiphon croceus
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© 2009 Neal Kramer

More photos of Leptosiphon croceus in CalPhotos

Geographic subdivisions for Leptosiphon croceus:
n CCo (Montara, San Mateo Co.).
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, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time.