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Sidalcea oregana subsp. oregana

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.
Reference: Andreasen & Baldwin 2003 Amer J Bot 90:436--444; Hill 2008 J Bot Res Inst Texas 2:783--791
Unabridged Reference: Hitchcock 1957 Univ Washington Publ Biol 18:1--96; Fryxell 1988 Syst Bot Monogr 25:412--416
Species: Sidalcea oreganaView Description 

Habit: Perennial herb 3--15 dm, taproot woody, crown branched, caudex 0. Stem: generally clustered (rooting near base); base glabrous to coarsely stellate-hairy to long-bristly. Leaf: basal and cauline; blade 3--10(15) cm wide, glabrous to hairy, lower crenate to deeply lobed, upper deeply (3)5--7-lobed, uppermost simple to 2--3 lobed, lobes narrow, entire to deeply lobed. Inflorescence: dense to open, generally +- spike-like, in panicle or not; flowering stalks generally 1--3 mm. Flower: calyx 3.5--9 mm, generally +- 5 mm, lobes lanceolate, glabrous to densely stellate-puberulent or bristly; petals (7)10--20 mm, pink to dark rose-pink. Fruit: segment 2--3 mm, smooth to weakly net-veined-pitted, sparsely glandular-puberulent, not stellate-hairy, beak 0.3--0.7 mm.

Unabridged Note: Within genus, source of most cultivars currently in nursery trade, some of which mistakenly called Sidalcea malviflora, also in cultivation but much less commonly.

Sidalcea oregana (Torr. & A. Gray) A. Gray subsp. oregana
Habit: Plant 3--15 dm. Stem: many, base stellate-hairy, occasionally bristly, above less hairy, occasionally glabrous. Inflorescence: in panicle or not, to 3 dm, flowers generally not overlapped, especially in fruit; flowering stalks 2--10 mm, generally 3 mm in flower, 5 mm in fruit; bracts generally < youngest flower buds. Flower: calyx generally 5--8 mm, to 10 mm in fruit, generally densely stellate-puberulent to long-bristly, marginal hairs occasionally longer; petals generally 5--15 mm. Fruit: segment 2.5--3 mm, generally glabrous, back generally smooth, sides occasionally net-veined, beak 0.3--0.7 mm. Chromosomes: 2n=20,40,60.
Ecology: Moist meadows; Elevation: 500--2500 m. Bioregional Distribution: NW, CaR, MP; Distribution Outside California: to Washington, Wyoming, Nevada. Flowering Time: May--Sep Note: Variable; intergrades with Sidalcea oregana subsp. spicata, Sidalcea setosa C.L. Hitchc.
Unabridged Note: C.L. Hitchcock referred +- all California plants of Sidalcea oregana subsp. oregana to Sidalcea oregana var. maxima (M. Peck) C.L. Hitchc.
eFlora Treatment Author: Steven R. Hill
Reference: Andreasen & Baldwin 2003 Amer J Bot 90:436--444; Hill 2008 J Bot Res Inst Texas 2:783--791
Unabridged Reference: Hitchcock 1957 Univ Washington Publ Biol 18:1--96; Fryxell 1988 Syst Bot Monogr 25:412--416
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botanical illustration including Sidalcea oregana subsp. oregana


Citation for this treatment: Steven R. Hill 2012, Sidalcea oregana subsp. oregana, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on September 19, 2018.

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

Sidalcea oregana subsp. oregana
click for enlargement
© 2008 George W. Hartwell
Sidalcea oregana subsp. oregana
click for enlargement
© 2008 George W. Hartwell
Sidalcea oregana subsp. oregana
click for enlargement
© 2008 George W. Hartwell

More photos of Sidalcea oregana subsp. oregana in CalPhotos

Geographic subdivisions for Sidalcea oregana subsp. oregana:
NW, CaR, MP;
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.