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Eremalche rotundifolia

Higher Taxonomy
Family: MalvaceaeView DescriptionDichotomous Key

Habit: Annual to tree; generally with stellate hairs, often with bristles or peltate scales; juice generally mucilage-like; bark fibrous. Leaf: generally cauline, alternate, petioled, simple [palmate-compound], generally palmate-lobed and/or veined, generally toothed, evergreen or not; stipules persistent or not. Inflorescence: head, spike, raceme, or panicle, in panicle or not (a compound panicle), or flowers >= 1 in leaf axils, or flowers generally 1 opposite a leaf or on a spur; bracts leaf-like or not; bractlets 0 or on flowering stalks, often closely subtending calyx, generally in involucel. Flower: generally bisexual, radial; sepals 5, generally fused at base, abutting in bud, larger in fruit or not, nectaries as tufts of glandular hairs at base; petals (0)5, free from each other but generally fused at base to, falling with filament tube, clawed or not; stamens 5--many, filaments fused for most of length into tube around style, staminodes 5, alternate stamens, or generally 0; pistil 1, ovary superior, stalked or generally not, chambers generally >= 5, styles or style branches, stigmas generally 1 or 1--2 × chamber number. Fruit: loculicidal capsule, [berry], or 5--many, disk- or wedge-shaped segments (= mericarps).
Genera In Family: 266 genera, 4025 species: worldwide, especially warm regions; some cultivated (e.g., Abelmoschus okra; Alcea hollyhock; Gossypium cotton; Hibiscus hibiscus). Note: Recently treated to include Bombacaceae, Sterculiaceae, Tiliaceae. Mature fruit needed for identification; "outer edges" are surfaces between sides and back (abaxial surface) of segment. "Flower stalk" used instead of "pedicel," "peduncle," especially where both needed (i.e., when flowers both 1 in leaf axils and otherwise).
eFlora Treatment Author: Steven R. Hill, except as noted
Scientific Editor: Steven R. Hill, Thomas J. Rosatti.
Genus: EremalcheView DescriptionDichotomous Key

Habit: Annual, glabrous or generally sparsely stellate-hairy; plant with bisexual or only pistillate flowers. Stem: prostrate to erect, +- hollow. Leaf: blade toothed to lobed or dissected, bases symmetric. Inflorescence: flowers 1 in leaf axils or in axillary or terminal clusters; flowering stalks longer in fruit; bractlets subtending calyx 3, persistent, linear to thread-like. Flower: calyx lobes > tube, acuminate; petals generally > calyx, white to +- purple (drying darker); filament tube included, anthers at tip; styles > filament tube, stigmas head-like. Fruit: segments generally 9--22 or 25--35, unarmed, glabrous, generally +- black, sides fragile, outer edges, back ridged or net-veined.
Species In Genus: 3 species: southwestern United States, northwestern Mexico. Etymology: (Greek: eremi, lonely, and malache, mallow, lonely mallow, from desert habitats)
eFlora Treatment Author: Katarina Andreasen & David M. Bates

Eremalche rotundifolia (A. Gray) Greene
Stem: erect, 8--60 cm, sometimes branched from base; hairs generally simple, bristly. Leaf: 1.5--6 cm wide, round-reniform, crenate to coarsely dentate. Inflorescence: flowers including petioles generally >> subtending leaves; bractlets 6--10 mm. Flower: bisexual; calyx 9.5--14 mm, lobes 5.5--11 mm, 3.5--7 mm wide; petals 15--30 mm, pink-purple, base with bright purple area. Fruit: segments generally 25--35, 2.8--3.5 mm, wafer-like, margins sharp, outer wall net-veined. Chromosomes: 2n=20.
Ecology: Dry desert scrub; Elevation: -50--1200 m. Bioregional Distribution: D; Distribution Outside California: Nevada, Arizona, northwestern Mexico. Flowering Time: Mar--May
Synonyms: Malvastrum rotundifolium A. Gray
eFlora Treatment Author: Katarina Andreasen & David M. Bates
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botanical illustration including Eremalche rotundifolia


Citation for this treatment: Katarina Andreasen & David M. Bates 2016. Eremalche rotundifolia, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on May 01, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on May 01, 2016.

Eremalche rotundifolia
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© 2014 California Academy of Sciences
Eremalche rotundifolia
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© 2016 Steve Matson
Eremalche rotundifolia
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© 1998 Christopher L. Christie
Eremalche rotundifolia
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© 2009 California Academy of Sciences
Eremalche rotundifolia
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© 2009 Aaron Schusteff
Eremalche rotundifolia
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© 2016 Steve Matson

More photos of Eremalche rotundifolia in CalPhotos

Geographic subdivisions for Eremalche rotundifolia:
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.