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Sidalcea oregana

Higher Taxonomy
Family: MalvaceaeView DescriptionDichotomous Key

Common Name: MALLOW FAMILY
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

Common Name: CHECKERBLOOM
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.

Sidalcea oregana (Torr. & A. Gray) A. Gray
NATIVE
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.
eFlora Treatment Author: Steven R. Hill
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Previous taxon: Sidalcea neomexicana
Next taxon: Sidalcea oregana subsp. eximia

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Citation for this treatment: Steven R. Hill 2016. Sidalcea oregana, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=44430, accessed on April 29, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on April 29, 2016.


Sidalcea oregana subsp. spicata
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© 2014 Neal Kramer
Sidalcea oregana subsp. spicata
click for enlargement
© 2015 Julie Kierstead Nelson
Sidalcea oregana subsp. spicata
click for enlargement
© 2015 Julie Kierstead Nelson
Sidalcea oregana subsp. spicata
click for enlargement
© 2009 Barry Breckling
Sidalcea oregana subsp. spicata
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© 2002 George W. Hartwell
Sidalcea oregana subsp. spicata
click for enlargement
© 2015 Julie Kierstead Nelson

More photos of Sidalcea oregana in CalPhotos


Geographic subdivisions for Sidalcea oregana:
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.
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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.