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Sidalcea asprella subsp. asprella
HARSH CHECKERBLOOM, SIERRA FOOTHILLS CHECKERBLOOM

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.
Species: Sidalcea asprellaView Description 

Habit: Perennial herb, generally +- stellate-hairy, occasionally +- glaucous above. Stem: erect or on other pls, base prostrate, decumbent-ascending to erect, hairs stellate, generally 4-rayed. Leaf: generally lobed, abaxially stellate-puberulent; lobes narrowest at base, tips generally toothed, occasionally entire; stipules 2--3 mm, +- 1.1 mm wide. Inflorescence: open, elongate, flowers generally 2--15(30); bracts leaf-like to linear, stellate-puberulent; flowering stalks 2--5(10) mm, stout. Flower: calyx 7--10 mm, densely stellate-puberulent, lobes 1--7-veined; petals 1--2.5 cm, pink, pale-veined, shorter, darker in pistillate. Fruit: segments (6)7--8, 3--4 mm, glandular-puberulent to +- stellate-puberulent (glabrous), net-veined, sides, back pitted, beak 0.5--1 mm.

Unabridged Note: Confused with Sidalcea elegans, Sidalcea celata, Sidalcea glaucescens, Sidalcea gigantea; needs study.

Sidalcea asprella Greene subsp. asprella
NATIVE
Habit: Plant 3--10(12) dm, caudex present or 0, rhizomes < 10(30) cm. Stem: often weak, on other pls, base stellate-hairy. Leaf: basal, cauline, all +- alike, gradually reduced upwards, +- lobed, lobe tips generally toothed; adaxially with generally simple hairs to stellate-puberulent. Inflorescence: erect, open, elongate, occasionally 1-sided, generally 8--15(30)-flowered; lowest bract generally leaf-like, +- 15 mm, 12 mm wide, bracts above linear, +- 3 mm, generally forked, < flower stalk; flowering stalks 2--5(8) mm, stout. Flower: calyx 7--10 mm, densely stellate-puberulent, lobes generally 6 mm, 3.5 mm wide, veins 5--7, 3 prominent; petals of bisexual flowers 2--2.5 cm, of pistillate generally 1--2 cm. Fruit: segments (6)7--8, beak +- 0.5--0.8 mm. Chromosomes: 2n=20,40,60.
Ecology: Open woodland, dry rocky slopes, foothill woodland, lower conifer forest; Elevation: (100)200--900(1800) m. Bioregional Distribution: NW, CaR, n&c SNH; Distribution Outside California: southwestern Oregon. Flowering Time: May--Jun
Synonyms: Sidalcea malviflora (DC.) A. Gray subsp. asprella (Greene) C.L. Hitchc.
Unabridged Note: Confused with Sidalcea asprella subsp. nana, Sidalcea elegans, Sidalcea glaucescens. Confused especially with Sidalcea gigantea, Sidalcea celata; needs study. May be mistaken easily with young plants of Sidalcea gigantea before stems, rhizomes fully developed, and fruits +- match in both species. Leaves of Sidalcea celata generally have adaxially simple or 2-branched hairs, those of the other 2 species have minute stellate hairs. Sidalcea gigantea has long reflexed bristles at stem base and well-developed rhizomes; Sidalcea celata generally has shorter simple hairs at stem base but rarely has similar stellate hairs instead; Sidalcea asprella has stellate hairs, but hairs can be short scabrous or longer-softer at stem base. All 3 species occur in Shasta Co., some specimens there may not be easily determined to sp. The typical subsp. appears to be replaced by Sidalcea asprella subsp. nana in NW, CaR, Oregon; it is especially difficult to be certain of identifications in this area.
eFlora Treatment Author: Steven R. Hill
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Citation for this treatment: Steven R. Hill 2016. Sidalcea asprella subsp. asprella, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=91785, accessed on August 26, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on August 26, 2016.


Sidalcea asprella subsp. asprella
click for enlargement
© 2009 Barry Breckling
Sidalcea asprella subsp. asprella
click for enlargement
© 2006 George W. Hartwell
Sidalcea asprella subsp. asprella
click for enlargement
© 2006 George W. Hartwell
Sidalcea asprella subsp. asprella
click for enlargement
© 2006 George W. Hartwell
Sidalcea asprella subsp. asprella
click for enlargement
© 2009 Barry Breckling
Sidalcea asprella subsp. asprella
click for enlargement
© 2010 Barry Breckling

More photos of Sidalcea asprella subsp. asprella in CalPhotos


Geographic subdivisions for Sidalcea asprella subsp. asprella:
NW, CaR, n&c SNH;
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.
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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.