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Malacothamnus fasciculatus var. catalinensis

Higher Taxonomy
Family: MalvaceaeView DescriptionDichotomous Key

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
Species: Malacothamnus fasciculatusView Description 

Habit: Plant 1--5 m, branches slender; hairs sessile (stalked), white, sparse to velvety, woolly. Leaf: blade 2--8 cm, lobes 0 or 3--5, shallow to deep, stellate hairs +- equally dense abaxially, adaxially. Inflorescence: panicle-like; flowers generally 3--7 per node; leaf-like bracts few; flowering stalks < 1.5 cm, bractlets to 1 cm, 1/2 as wide, 1/2 calyx. Flower: buds acuminate; calyx 4--7(11) mm, 1/2 as wide, lobes acute, < 2 × tube; petals 1--3 cm; filament column < petals. Fruit: segments < 5 mm, deeply notched, brown. Chromosomes: 2n=34.
Note: Varieties may be untenable, needs study.

Malacothamnus fasciculatus var. catalinensis (Eastw.) Kearney
Habit: Plant 1--3 m, branches +- erect; hairs stalked. Leaf: blade < 7 cm, < 8 cm wide, thin, 3--5-lobed. Inflorescence: flowering stalks < 1 cm. Flower: calyx < 0.7 cm, lobes deltate to cordate; petals 1.3--2.6 cm; filament column 1/2 petals. Fruit: segments 3.2--3.8 mm.
Ecology: Open chaparral; Elevation: < 500 m. Bioregional Distribution: s ChI (Santa Catalina Island). Flowering Time: May--Jul
eFlora Treatment Author: Tracey Slotta
Unabridged Reference: Kearney 1951 Leafl W Bot 6:93--131; Fryxell 1988 Syst Bot Monogr:270--274
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Listed on CNPS Rare Plant Inventory

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Citation for this treatment: Tracey Slotta 2012, Malacothamnus fasciculatus var. catalinensis, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on September 24, 2018.

Citation for the whole project: Jepson Flora Project (eds.) 2018, Jepson eFlora,, accessed on September 24, 2018.

Malacothamnus fasciculatus var. catalinensis
click for enlargement
© 2010 Gary A. Monroe
Malacothamnus fasciculatus var. catalinensis
click for enlargement
© 2010 Gary A. Monroe
Malacothamnus fasciculatus var. catalinensis
click for enlargement
© 2010 Gary A. Monroe
Malacothamnus fasciculatus var. catalinensis
click for enlargement
© 2010 Gary A. Monroe

More photos of Malacothamnus fasciculatus var. catalinensis in CalPhotos

Geographic subdivisions for Malacothamnus fasciculatus var. catalinensis:
s ChI (Santa Catalina Island).
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.
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).

View elevation by latitude chart
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, if there are more than 1 infraspecific taxon in CA.
Blue line denotes eFlora flowering time.