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Sidalcea hickmanii subsp. napensis
NAPA 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 hickmaniiView Description 

Habit: Perennial herb from woody caudex, rhizome 0. Stem: 1--8 dm, coarsely, generally densely stellate-canescent. Leaf: generally all along stem, generally alike in size, shape; blade coarsely crenate to generally shallowly or deeply lobed, width 1--6 cm, generally > length. Inflorescence: bracts generally stipule-like; flowering stalks generally 1--4 mm; bractlets 3, 2--12 mm. Flower: generally bisexual; calyx lobes 3--10 mm, stellate-puberulent, bristly or not; petals 5--18 mm, pale pink to pink-lavender. Fruit: segments generally 6--10, (1)2--2.5 mm, glabrous, sides generally smooth, thin, outer edges, back generally net-veined, transversely ridged, back generally with medial ridge, beak 0.


Sidalcea hickmanii subsp. napensis S.R. Hill
NATIVE
Habit: Plant +- 3 dm, caudex +- elongate. Stem: few to several, +- stellate-canescent to glabrous, generally +- maroon. Leaf: generally < 5 per stem; blade 14--18 mm, 20--25 mm wide, stellate-hairy; mid-stem leaves 3--5(7)-lobed +- to base, middle lobe largest, lobes narrowed to base, tips toothed; lower leaves occasionally coarsely crenate. Inflorescence: generally unbranched, flowers overlapped above; bracts like stipules, < calyx; bractlets 5--6 mm, 0.7--1 mm wide, < calyx. Flower: calyx 7--10 mm, not larger in fruit, lobes 5--6 mm, 2.5--3 mm wide, acuminate; petals 9--11 mm, +- 6 mm wide, pale pink.
Ecology: Chamise chaparral, rocky rhyolitic volcanic soil; Elevation: 450--500 m. Bioregional Distribution: NCoRI (Napa Co.). Flowering Time: May Note: Known from 1 historic, 2 recent collections; threatened by agriculture.
Unabridged Note: Distinctive lobed leaves like Sidalcea hickmanii subsp. anomala, but fewer generally shorter stems, fewer leaves. Threatened by agriculture.
eFlora Treatment Author: Steven R. Hill
Jepson Online Interchange
Listed on CNPS Rare Plant Inventory

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Citation for this treatment: Steven R. Hill 2016. Sidalcea hickmanii subsp. napensis, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=86219, accessed on February 12, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 12, 2016.


Geographic subdivisions for Sidalcea hickmanii subsp. napensis:
NCoRI (Napa Co.).
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.