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Loeseliastrum matthewsii

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
Scientific Editor: Robert Patterson, Thomas J. Rosatti.
Genus: LoeseliastrumView DescriptionDichotomous Key

Habit: Annual, bristly, generally soft; hairs simple. Stem: erect. Leaf: generally 0 below, alternate, simple, 1--4 cm, linear to oblanceolate, entire to toothed; teeth acute to pointed or bristle-tipped. Inflorescence: bracts leaf-like; pedicels glandular. Flower: calyx lobes equal, pointed to bristle-tipped; corolla bilateral, 2-lipped, white to deep pink, upper lip generally 3-lobed, lower 2-lobed; stamens attached at or below sinuses, unequal, generally curved, included to exserted, pollen yellow; style generally exserted. Fruit: 2--5 mm, ovoid, 3-lobed in ×-section; outer wall of valve rounded or indented between walls separating chambers. Seed: gelatinous when wet. Chromosomes: 2n=14.
Species In Genus: 3 species: southwestern United States, northern Mexico. Etymology: (Latin: like Loeselia) Note: Self-compatible; self- to cross-pollinated.
eFlora Treatment Author: Dieter H. Wilken & Steven L. Timbrook

Loeseliastrum matthewsii (A. Gray) Timbrook
Leaf: largest generally oblanceolate, teeth coarse, bristle-tipped. Flower: calyx (except bristles) 1/2--3/4 corolla tube, lobes bristle-tipped; corolla strongly bilateral, 11--21 mm, white to deep rose-purple, upper lip 5--11 mm, 3/4 to > tube, < longer stamens, lobe bases with bright maroon arches and white blotch, rarely suffused with yellow, lower lip 4--7 mm, lobe tips truncate, 3-toothed, or notched, generally with inward-directed projections in sinuses on either side of middle lobe of upper lip.
Ecology: Common. Desert washes, flats, slopes, sandy to gravelly soils; Elevation: generally < 1800 m. Bioregional Distribution: n TR, n PR, SNE, DMoj, w DSon; Distribution Outside California: Nevada. Flowering Time: Mar--Jul
Synonyms: Langloisia matthewsii (A. Gray) Greene
eFlora Treatment Author: Dieter H. Wilken & Steven L. Timbrook
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botanical illustration including Loeseliastrum matthewsii


Citation for this treatment: Dieter H. Wilken & Steven L. Timbrook 2016. Loeseliastrum matthewsii, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on May 06, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on May 06, 2016.

Loeseliastrum matthewsii
click for enlargement
© 2014 Neal Kramer
Loeseliastrum matthewsii
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© 1998 Larry Blakely
Loeseliastrum matthewsii
click for enlargement
© 2014 Neal Kramer
Loeseliastrum matthewsii
click for enlargement
© 2013 Keir Morse
Loeseliastrum matthewsii
click for enlargement
© 2014 Neal Kramer
Loeseliastrum matthewsii
click for enlargement
© 2014 Neal Kramer

More photos of Loeseliastrum matthewsii in CalPhotos

Geographic subdivisions for Loeseliastrum matthewsii:
n TR, n PR, SNE, DMoj, w DSon;
Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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.