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Alcea rosea
HOLLYHOCK

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: AlceaView Description 

Habit: Biennial, perennial herb. Stem: erect. Leaf: petiole long; blade +- palmate-lobed. Inflorescence: spike, raceme, in panicle or not; bractlets 5--11, fused at base, <= sepals. Flower: showy, > 3 cm, pink, white, red, purple or yellow; petals notched distally; anthers near top of filament tube, below; stigmas thread-like. Fruit: segments 16--40, falling from axis, indehiscent, each with an upper, empty chamber and a lower, 1-seeded chamber, beak 0.
Species In Genus: 60 species: eastern Mediterranean to central Asia. Etymology: (Greek: alke, remedy, or alce, strength; ancient name for this mallow)

Alcea rosea L.
NATURALIZED
Stem: generally 1--2.5 m, generally unbranched, pithy; stellate-hairy, +- glabrous in age. Leaf: blade generally 7--15(20) cm, cordate or ovate to +- round, weakly palmate-5--7-lobed, stellate-hairy. Inflorescence: generally dense, generally branched in age; bracts generally not leaf-like; bractlets 6--9, <= sepals, widely triangular, fused at base. Flower: +- sessile, 8--10(12) cm diam; calyx tomentose; stigmas generally 20--40. Fruit: disk-like; segments 20--40, +- 6 mm, horseshoe-shaped, thin, flat, back channeled, winged, hairy. Chromosomes: 2n=42.
Ecology: Uncommon. Disturbed places; Elevation: especially < 1100 m. Bioregional Distribution: SnFrB, SW; Distribution Outside California: perhaps native to Asia Minor. Flowering Time: Jun--Aug Note: Occasionally escaped from cultivation.
Synonyms: Althaea rosea (L.) Cav.
eFlora Treatment Author: Steven R. Hill
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Citation for this treatment: Steven R. Hill 2016. Alcea rosea, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=12392, accessed on February 11, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 11, 2016.


Alcea rosea
click for enlargement
© 2015 Neal Kramer
Alcea rosea
click for enlargement
© 2015 Neal Kramer
Alcea rosea
click for enlargement
© 2015 Neal Kramer
Alcea rosea
click for enlargement
© 2015 Neal Kramer
Alcea rosea
click for enlargement
© 2015 Neal Kramer
Alcea rosea
click for enlargement
© 2015 Neal Kramer

More photos of Alcea rosea in CalPhotos


Geographic subdivisions for Alcea rosea:
SnFrB, SW;
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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Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.