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MALVACEAE MALLOW FAMILY

Steven R. Hill, except as noted

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).
266 genera, 4025 species: worldwide, especially warm regions; some cultivated (e.g., Abelmoschus okra; Alcea hollyhock; Gossypium cotton; Hibiscus hibiscus). [Angiosperm Phylogeny Group 1998 Ann Missouri Bot Gard 85:531–553] 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). —Scientific Editors: Steven R. Hill, Thomas J. Rosatti.
Unabridged references: [Alverson et al. 1999 Amer J Bot 86:1474–1486; Bayer et al. 1999 Bot J Linn Soc 129:267–303; Hill 2009 Madroño 56:104–111]

Key to Malvaceae

SPHAERALCEA GLOBEMALLOW

John C. La Duke

Annual, perennial herb, subshrub, canescent to stellate-hairy, with longer hairs or not. Leaf: petioled; blade lance-linear to triangular, entire to deeply dissected. Inflorescence: raceme-like (flowers clustered in bract axils) or panicle; bractlets (0)1–3, inconspicuous, generally deciduous, thread-like. Flower: petals obovate, white, lavender, pink, rose-pink, salmon- or red-orange, or apricot; filament tube hairs 0 or stellate, anthers generally ± yellow or ± purple; stigmas head-like. Fruit: segments 9–17, 1–2-seeded, below indehiscent, strongly net-veined, above dehiscent, smooth. Seed: gray, black, or brown.
± 50 species: arid America. (Greek: globe mallow, from fruit shape) Polyploidy, intermediates common.
Unabridged references: [Fryxell 1988 Syst Bot Monogr 25:421–438]

Key to Sphaeralcea

S. orcuttii Rose CARRIZO MALLOW
NATIVE
[Annual], subshrub, ± yellow-canescent, hairs fine. Stem: erect, 5–12 dm. Leaf: blade 30–50 mm, rounded to triangular, prominently 3-veined, generally yellow-green, entire to ± wavy, base tapered to truncate; lobes ± 3. Inflorescence: raceme-like or dense panicle, tip without leaf-like bracts; flower stalk < calyx. Flower: petals 10–12 mm, red-orange; filament tube 5–6 mm, hairy, anthers yellow. Fruit: segments 12–17, 2.5–3 mm, 2–3 mm wide, ± hemispheric, dehiscent part < 1 mm, < 20% of segment. Seed: 1 per segment, brown, glabrous or ± hairy.
2n=10. Dry, sandy, ± alkaline desert scrub; -20–900 m. s Sonoran Desert; Arizona, Mexico. Feb–Sep [Online Interchange]

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Sep 18 2014
Citation for this treatment: [Author of taxon treatment] 2013. Sphaeralcea, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=45148, accessed on Sep 18 2014

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Geographic subdivisions indicated for the distribution of Sphaeralcea orcuttii 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.