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Vascular Plants of California
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Malacothamnus abbottii
ABBOTT'S BUSH-MALLOW


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: MalacothamnusView DescriptionDichotomous Key


Common Name: BUSH-MALLOW
Habit: Generally shrub, generally erect; hairs sparse to dense, stellate (stalked or sessile), simple, and glandular. Leaf: petioled; blade unlobed to 3--7-lobed, coarsely or shaggy-hairy to tomentose. Inflorescence: head- to panicle-like, flowers generally > 1 in leaf axils; bracts leaf-like or not, in involucre or not; bractlets 3, free, linear to lanceolate, persistent. Flower: calyx 5-lobed; petals 5, pale pink-purple or white (often +- purple when dry); petals generally > calyx, fused at base; stamens open prior to stigma maturation; style branches 5--14. Fruit: segments 5--14, 2--5 mm, separating, dehiscent, smooth, top hairy, beak 0. Seed: 1 per segment, brown to black.
Species In Genus: 12 species: California, northwestern Mexico. Etymology: (Greek: malakos, soft, thamnos, shrub) Note: Malacothamnus foliosus (S. Watson) Kearney reported but evidently not documented for California.
eFlora Treatment Author: Tracey Slotta
Unabridged Reference: Kearney 1951 Leafl W Bot 6:93--131; Fryxell 1988 Syst Bot Monogr:270--274
Malacothamnus abbottii (Eastw.) Kearney
NATIVE
Habit: Plant < 1.5 m; hairs dense, white, sessile. Leaf: blade < 5 cm, round, shallowly 3-lobed, hairs adaxially +- = abaxially; veins prominent abaxially. Inflorescence: panicle-like; flowers 3--4 per node; bracts few; flowering stalks < 1 cm. Flower: buds acuminate; calyx +- 1 cm, +- 0.4 cm wide; petals 1--2 cm; filament column < petals. Fruit: segments dark brown, reniform.
Ecology: Sandy soils, streambanks, chaparral; Elevation: < 400 m. Bioregional Distribution: SCoR (Monterey Co.). Flowering Time: May--Jul
Jepson eFlora Author: Tracey Slotta
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Listed on CNPS Rare Plant Inventory

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Botanical illustration including Malacothamnus abbottii

botanical illustration including Malacothamnus abbottii

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Citation for this treatment: Tracey Slotta 2012, Malacothamnus abbottii, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=32512, accessed on November 20, 2019.

Citation for the whole project: Jepson Flora Project (eds.) 2019, Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on November 20, 2019.

Malacothamnus abbottii
click for enlargement
© 2018 Keir Morse
Malacothamnus abbottii
click for enlargement
© 2018 Keir Morse
Malacothamnus abbottii
click for enlargement
© 2018 Keir Morse
Malacothamnus abbottii
click for enlargement
© 2018 Keir Morse
Malacothamnus abbottii
click for enlargement
© 2018 Keir Morse
Malacothamnus abbottii
click for enlargement
© 2018 Keir Morse

More photos of Malacothamnus abbottii in CalPhotos



Geographic subdivisions for Malacothamnus abbottii:
SCoR (Monterey Co.).
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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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Blue markers indicate specimens that map to one of the expected Jepson geographic subdivisions (see left map). Purple markers indicate specimens collected from a garden, greenhouse, or other non-wild location.
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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time.