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Sidalcea malviflora subsp. malviflora

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: SidalceaView DescriptionDichotomous Key

Habit: Annual, perennial herb; with taproot, clustered fleshy roots, caudex, adventitious roots, or occasionally shallow rhizome. Stem: +- decumbent or generally erect, some occasionally stolon-like; erect stem, branches terminating in inflorescence. Leaf: generally fewer above, occasionally +- rosetted; petioles below generally >> petioles above; blades below generally crenate to shallowly lobed, blades above often deeply palmate-lobed or -divided; stipules generally persistent. Inflorescence: head, spike, or raceme, in panicle or not, generally more open in fruit; bracts 2, generally stipule-like, occasionally involucre-like, united at base to +- entirely; bractlets 0(3), generally not in involucel. Flower: flowers generally bisexual, protandrous, occasionally functionally unisexual (occasionally, plants with either bisexual or pistillate flowers in a given sp.); calyx lobes >= tube; petals spreading or erect, purple or rose-pink to white, generally with some pale veins, base generally also paler than tips (occasionally darker), tip +- notched or fringed, petals on pistillate flowers shorter, darker, often <= 10 mm; filament tube generally stellate-puberulent, anthers near top, in generally 2 concentric series, generally pink, +- purple, or white; stigmas linear, on inner side of style branches, conspicuous in pistillate flowers. Fruit: segments generally 5--10, indehiscent, puberulent, glandular, or glabrous, beaked or not, side walls generally +- thin. Seed: 1, generally filling chamber, reniform, glabrous.
Species In Genus: +- 27 species: western North America: Alaska, Canada, to Mexico. Etymology: (Greek: combination of Sida, Alcea, 2 other names for mallows) Note: Some species highly variable, especially in leaves, growth stage; mature plants with fruit minimize considerable problems in identification, as does knowledge of plant base, underground parts; needs study.
Unabridged Note: This treatment differs from that in TJM (1993) in addition of new taxa and in segregation as species of former, primarily inland subspecies of Sidalcea malviflora, now primarily a coastal entity.
Species: Sidalcea malvifloraView Description 

Habit: Perennial herb 1.5--10 dm, generally rhizomed, caudex woody. Stem: generally hairy. Leaf: generally dentate or lobed (entire), upper generally much reduced. Inflorescence: dense to open; lowest bracts often leaf-like, generally divided to base; bractlets 0. Flower: calyx 5--12 mm, +- larger in fruit, generally densely stellate-puberulent, bristly, bristles often on swollen pad; petals 10--20(35) mm, bright to dark pink, generally white-veined. Fruit: segment 2.5--4 mm, +- deeply pitted, net-veined, generally more so on sides than back, beak generally short. Chromosomes: 2n=20,40,60.
Note: Highly variable intergrading complex, many local variants; inland upland taxa probably do not belong in this sp., study needed.

Sidalcea malviflora (DC.) A. Gray subsp. malviflora
Habit: Plant 1.5--6 dm. Stem: decumbent at base, rooting, generally densely coarsely stellate-hairy, spreading-bristly especially at base. Leaf: blade 2--6 cm wide, 7--9-lobed, generally +- coarsely hairy, +- fleshy, upper more deeply lobed or not. Inflorescence: generally unbranched; flowers close but +- evenly spaced. Flower: calyx densely stellate-puberulent, coarsely bristly, bristles often on swollen pad, hairs at base shorter, denser, marginal longer; petals 1--2.5 cm, pink to rose, white-veined. Fruit: segment 3.5--4 mm, +- sparsely glandular-puberulent, net-veined-pitted, beak short. Chromosomes: 2n=40,60.
Ecology: Coastal prairie, scrub, open forest; Elevation: generally < 500 m. Bioregional Distribution: s NCo, NCoRO, CCo, SnFrB, SCo, n ChI. Flowering Time: Mar--Jul Note: Intergrades with most other subspecies. Once common in, now generally extirpated from Los Angeles area.
Synonyms: Sidalcea delphiniifolia (Nutt. ex Torr. & A. Gray) A. Gray ex Benth.
Unabridged Note: Probably the most difficult of the subspecies to identify, partly because of changing concepts of the sp., it should have obviously lobed leaves, but not as finely divided as Sidalcea malviflora subsp. laciniata. Next to Sidalcea malviflora subsp. rostrata, often closest to coast. Probably has been the subsp. most damaged or modified by coastal development, resulting in local extinctions or intermediate forms. Probably the purest populations, genetically, remain on the northern ChI because of their isolation.
eFlora Treatment Author: Steven R. Hill
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botanical illustration including Sidalcea malviflora subsp. malviflora


Citation for this treatment: Steven R. Hill 2016. Sidalcea malviflora subsp. malviflora, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on October 27, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on October 27, 2016.

Sidalcea malviflora subsp. malviflora
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© 2014 Steve Matson
Sidalcea malviflora subsp. malviflora
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© 2011 California Academy of Sciences
Sidalcea malviflora subsp. malviflora
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© 2013 Julie Kierstead Nelson
Sidalcea malviflora subsp. malviflora
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© 2015 Barry Breckling
Sidalcea malviflora subsp. malviflora
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© 2016 California Academy of Sciences
Sidalcea malviflora subsp. malviflora
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© 2007 Neal Kramer

More photos of Sidalcea malviflora subsp. malviflora in CalPhotos

Geographic subdivisions for Sidalcea malviflora subsp. malviflora:
s NCo, NCoRO, CCo, SnFrB, SCo, n ChI.
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.
Blue line denotes eFlora flowering time.