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Malacothamnus eastwoodiae

ALICE'S LOVELY BUSHMALLOW


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: BUSHMALLOW
Habit: Shrubs, sometimes spreading by rhizomes; sparsely to densely stellate-hairy and simple-glandular-hairy, flowers sometimes also with simple or 2-branched nonglandular hairs; stellate hairs stalked or not, 3--40-branched; glandular hairs not branched, often << stellate hairs. Stem: erect to ascending. Leaf: petioled; blades ovate to round (rarely diamond-shaped or +- reniform), unlobed or 3--7-palmate-lobed, margins generally toothed, bases cordate to truncate or wedge-shaped; stipules awl-shaped or linear to lanceolate or sometimes curved; transitioning in inflorescence into bracts +- resembling stipules. Inflorescence: Head-like to spike-like to panicle-like; bracts subtending the often highly reduced inflorescence internodes awl-shaped to linear to triangular to +- round, sometimes curved, occasionally 2--5-lobed, if 2-lobed resembling fused pair of +- modified stipules, smaller bracts sometimes deciduous; bractlets in whorl of 3 subtending calyx, distinct (occasionally fused at base in M. aboriginum), generally awl-shaped to linear, occasionally oblong or narrowly elliptic to ovate, green or partially to all red. Flower: calyx 5-lobed, not enlarging after flowering, not inflated, lobes triangular to ovate, tips acute to acuminate; petals exceeding calyx, unevenly obovate with rounded tip entire to notched or somewhat ragged-margined, pink to occasionally white and often varying in populations, generally drying closed after pollination or in some taxa drying partially to fully open; stamen tube +- included, filaments terminal and subterminal; ovary of 7--14 carpels, ovules 1 per cell, styles 7--14-branched, branches equal in number to carpels, stigmas head-like. Fruit: +- disk-like, fragile when dry, tip minutely stellate-hairy; segments 7--14, drying tan, 1-celled, wide-elliptic to obovoid-reniform, often notched near base, smooth-walled, fully dehiscent with each fruit segment splitting into two separate halves, beak 0. Chromosomes: 2n=34.
Etymology: (Greek: malakos, soft, thamnos, shrub) Note: Measurements for dry specimens; measurements for fresh specimens also provided in key. All Malacothamnus taxa can presumably hybridize; planting Malacothamnus taxa outside their natural range could threaten resident populations, a special concern for rare taxa. Hybridization/intergradation common where geographic ranges of some taxa meet; outside these zones of morphologically intermediate or intergrading plants, identification relatively simple and taxa relatively distinct. Such transition zones mostly between two taxa making parent taxa of intermediates easy to deduce; ranges of 3+ species abut near Santa Clarita making parentage of intermediate plants there unclear. Seeds generally germinate after fires in areas where woody plants burned; plants often short-lived, +- 5 years, but some may persist 20+ years post-burn.
eFlora Treatment Author: Keir Morse
Unabridged Reference: Morse 2023 Malacothamnus Volume 3 -- A Revised Treatment of the Genus Malacothamnus Based on Morphological and Phylogenetic Evidence https://doi.org/10.6084/m9.figshare.23937066
Malacothamnus eastwoodiae K. Morse
NATIVE
Habit: <= 3 m, spreading by rhizomes. Stem: moderately to densely stellate-hairy, surface sometimes visible through hairs without magnification, stellate hairs with branches <= 1.4 mm (mean per plant 0.4--0.8 mm), many stalked, stalks <= 0.6 mm, glandular hairs on stem <= 0.8 mm (mean per plant 0.1--0.5 mm). Leaf: blades +- round to widely ovate, length generally >= width, obscurely to moderately 3--7-lobed, lobes rounded to acute, bases cordate, surfaces generally bright green adaxially and paler abaxially, stellate hairs with branches <= 1 mm (mean 0.5 mm), many stalked, stalks <= 0.3, abaxial stellate hair density 1--2× adaxial, glandular hairs <= 0.6 mm (mean per plant 0.1--0.3 mm). Inflorescence: Spikes of interrupted and loosely flowered clusters (rarely more proximal branches and/or pedicels elongated); bracts subtending inflorescence internodes linear or awl-shaped, sometimes curved, 4--7 mm, 0.5--1.5 mm wide, length 2.5--15× width, bractlets subtending calyx linear, 4--11 mm, 0.3--0.5 mm wide, length 10--28× width, 0.4--0.7× calyx, partially to fully red. Flower: calyx 8.5--15.5 mm, lobes 5--10 mm × 2.5--4.5 mm, lobe at base 2--4 mm wide, widest at base or <= 2 mm above base, length 1.8--3(3.6) × width, triangular to ovate, tip acuminate and often reddish, abaxial calyx stellate hairs with branches 0.1--2 mm (mean per plant 0.5--0.8 mm), many stalked, stalks <= 0.4, abaxial glandular hairs 0.1--0.9 mm (mean per plant 0.3--0.7 mm); corolla drying closed, petals to +- 3.5 cm.
Ecology: Probably early-recovering post-burn woody vegetation, edges of openings, some plants occasionally persisting into more mature vegetation stages; Elevation: 30--125 m. Bioregional Distribution: s CCo (Vandenberg Space Force Base). Flowering Time: May--Jun(Aug) Note: Distinguished from other taxa except M. densiflorus var. viscidus (see note for that taxon) by combination of relatively long glandular hairs and spike-like inflorescence. Hybridizes with M. nuttallii where ranges meet and possibly threatened by this hybridization due to very small range of M. eastwoodiae.
Jepson eFlora Author: Keir Morse
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)

Previous taxon: Malacothamnus discombobulatus
Next taxon: Malacothamnus enigmaticus


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Citation for this treatment: Keir Morse 2023, Malacothamnus eastwoodiae, in Jepson Flora Project (eds.) Jepson eFlora, Revision 12, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=108347, accessed on July 12, 2024.

Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on July 12, 2024.

Malacothamnus eastwoodiae
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©2023 Keir Morse
Malacothamnus eastwoodiae
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©2023 Keir Morse
Malacothamnus eastwoodiae-nuttallii-intermediate
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©2023 Keir Morse
Malacothamnus eastwoodiae
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©2023 Keir Morse
Malacothamnus eastwoodiae
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©2023 Keir Morse

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Geographic subdivisions for Malacothamnus eastwoodiae:
s CCo (Vandenberg Space Force Base).
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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 occurrence).






 

Data provided by the participants of the  Consortium of California Herbaria.

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CCH collections by month Flowering-Fruiting Monthly Counts

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