Leptosiphon bicolor

From Puget Prairie Plants
  • Scientific Name: Leptosiphon bicolor
  • Family: Polemoniaceae
  • Common Names: bicolored babystars, bicolored linanthus
  • Synonyms/Misapplications: Linanthus bicolor
  • Codon: LEPBIC

Photo by Ben Legler, also featured on Main Page


Scientific classification
Kingdom: Plantae
Subkingdom: Viridiplantae
Phylum: Tracheophyta
Subphylum: Spermatophytina
Class: Magnoliopsida
Subclass: Asteranae
Order: Ericales
Family: Polemoniaceae
Genus: Leptosiphon Benth.
Species: Leptosiphon bicolor Nutt.
  • Linanthus bicolor (Nutt.) Greene
  • Linanthus bicolor ssp. bicolor (Nutt.) Greene



Annual, slender taprooted herb.

Opposite, sessile, palmately lobed leaves, leaf segments linear-elongate.[2]The leaves of the inflorescence larger and often more lobed than the cauline leaves.[3]

Inflorescence dense, bracteate heads, flowers subsessile, corolla tube 12-30 mm, flowers pink to white, generally bicolored. Calyx more or less glabrous, sometimes scarcely hispid on outer surface or with marginal cilia.[2]

Fruits are 3-chambered capsules, bearing several seeds per capsule.[3]

From Greek lepto, narrow, siphon, tube, for shape of corolla tube.[2]

Bloom Period

April- June[4]


West Cascades, southwest B. C., to California, east through the Columbia Gorge, and east side of Cacsades in Oregon.[2]


Open, grassy places at lower elevation.[2]


Seed sample from: 2011

Leptosiphon seeds, photo by Lisa Hintz

Average Measurement: 1.3 x 0.8 x 0.7

Measurement Range: L: 1.1 – 1.75, W: 0.6 – 1, D: 0.5 – 1


Shape: Seeds somewhat tear shaped, others elliptical.

Color: Seeds partially translucent and brown. Hilium inconspicuous.

Surface: Seeds bumpy and somewhat corrugated, giving them a “brain-like” texture. Seeds slightly glossy.

Latitudinal Cross Section: elliptical LEBI lat.png

Longitudinal cross section: elliptical LEBI long.png , and at times, obovate LEBI long ob.png

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  1. Integrated Taxonomic Information System. Retrieved from https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=845247
  2. 2.0 2.1 2.2 2.3 2.4 Hitchcock, C. L., Cronquist, A., Giblin, D., & Legler, B. et al. (2018). Flora of the Pacific Northwest: an illustrated manual. Seattle: University of Washington Press.
  3. 3.0 3.1 Klinkenberg, Brian. (Editor) 2020. E-Flora BC: Electronic Atlas of the Plants of British Columbia [eflora.bc.ca]. Lab for Advanced Spatial Analysis, Department of Geography, University of British Columbia, Vancouver. [Accessed: 2020-06-09 2:18:57 PM ]
  4. WTU Herbarium, Burke Museum, & University of Washington. Retrieved from https://biology.burke.washington.edu/herbarium/imagecollection/taxon.php?Taxon=Leptosiphon%20bicolor