View source for Malacothamnus

{{Treatment/ID
|accepted_name=Malacothamnus
|accepted_authority=Greene
|publications={{Treatment/Publication
|title=Leafl. Bot. Observ. Crit.
|place=1: 208. 1906
|year=1906
}}
|common_names=Chaparral mallow;bushmallow
|basionyms=
|synonyms=
|hierarchy=Malvaceae;Malvaceae subfam. Malvoideae;Malacothamnus
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Malvaceae]]</div><div class="higher-taxon"><small>subfamily</small>[[Malvaceae subfam. Malvoideae]]</div><div class="higher-taxon"><small>genus</small>[[Malacothamnus]]</div></div>
|etymology=Greek malakos, soft, or malache, mallow, and thamnos, shrub, alluding to habit
|volume=Volume 6
|mention_page=page 219, 281, 283
|treatment_page=page 280
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Subshrubs </b>or shrubs, sometimes root-suckering, glabrate to densely hairy, hairs various, simple or bifurcate, simple-glandular, and stellate, ca. 6–30-armed. <b>Stems</b> erect or ascending, ultimate branches strict to diffuse. <b>Leaves</b>: stipules ± persistent, filiform to subulate; blade ovate to round, rhombic, or reniform, unlobed or palmately 3-, 5-, or 7-lobed, base cordate to truncate or cuneate, margins usually toothed. <b>Inflorescences</b> usually axillary, rarely terminal, flowers solitary or in clusters in dense to open heads, spikes, racemes, or panicles; involucellar bractlets persistent, 3, distinct (basally connate in <i>M. aboriginum</i>). <b>Flowers</b>: calyx not accrescent, not inflated, lobes triangular to ovate, not ribbed; corolla exceeding calyx, campanulate to subrotate, usually rose to pale pink, pinkish mauve, or mauve, rarely white; staminal column ± included; filaments terminal and subterminal; ovary 7–14-carpellate; ovules 1 per cell; styles 7–14-branched, (branches equal in number to carpels); stigmas capitate. <b>Fruits</b> schizocarps, erect, not inflated, disclike, subglobose-obovate in lateral view, not indurate, fragile, apically minutely stellate-hairy; mericarps 7–14, drying tan, 1-celled, asymmetrically suborbicular to obovoid-reniform, smooth-walled, without dorsal spur, apex muticous, dehiscence loculicidal, walls falling away as 2 fragile valves. <b>Seeds</b> 1 per mericarp, ascending, brown or black, obovoid-reniform, usually papillate-stellate or minutely stellate-hairy or rarely glabrous. <b>x</b> = 17.</span><!--

-->{{Treatment/Body
|distribution=Calif.;nw Mexico.
|discussion=<p>Species 11 (10 in the flora).</p><!--
--><p>Most species of <i>Malacothamnus</i> are locally common in early burn successions of chaparral and adjacent vegetation types in California and northern Baja California. <i>Malacothamnus</i> foliosus (S. Watson) Kearney is the only species restricted to Mexico; it is found in northern Baja California.</p><!--
--><p>Major morphological variants in <i>Malacothamnus</i> have been recognized as species, as treated by T. H. Kearney (1951). Insofar as known, most taxa are interfertile and in some instances intergrade in areas of proximity. Interpopulational variation within most species in indument and inflorescence characters is high and of moderately complex patterning.</p>
|tables=
|references={{Treatment/Reference
|id=bates1963a
|text=Bates, D. M. 1963. The Genus Malacothamnus. Ph.D. dissertation. University of California, Los Angeles.
}}{{Treatment/Reference
|id=benesh1999a
|text=Benesh, D. L. and W. J. Elisens. 1999. Morphological variation in Malacothamnus fasciculatus (Torrey & A. Gray) E. Greene (Malvaceae) and related species. Madroño 46: 142–152.
}}{{Treatment/Reference
|id=kearney1951a
|text=Kearney, T. H. 1951. The genus Malacothamnus Greene (Malvaceae). Leafl. W. Bot. 6: 113–140.
}}
}}<!--

--><div class="treatment-key">
==Key==
<div class="treatment-key-group">
  
{| class="wikitable fna-keytable"
|-id=key-0-1
|1
|Involucellar bractlets 1–9 mm wide
|[[#key-0-2| > 2]]
|-id=key-0-1
|1
|Involucellar bractlets 0.2–0.8(–1) mm wide
|[[#key-0-4| > 4]]
|-id=key-0-2
|2
|Inflorescences open-paniculate, flowers solitary or in loose clusters, not subtended by conspicuous bracts; indument white and dense (hairs simple, fine), sometimes sublepidote (hairs stellate, sessile).
|[[Malacothamnus abbottii|Malacothamnus abbottii]]
|-id=key-0-2
|2
|Inflorescences spicate, racemose, or headlike, flower clusters glomerate, subtended by conspicuous bracts; indument grayish, tawny, or white, dense to sparse, hairs stellate, sessile or stalked, sometimes mixed with glandular and/or armed hairs
|[[#key-0-3| > 3]]
|-id=key-0-3
|3
|Flower clusters in elongate, spicate or racemose inflorescences, involucellar bractlets distinct or basally connate.
|[[Malacothamnus aboriginum|Malacothamnus aboriginum]]
|-id=key-0-3
|3
|Flower clusters in headlike or spicate inflorescences, involucellar bractlets distinct.
|[[Malacothamnus palmeri|Malacothamnus palmeri]]
|-id=key-0-4
|4
|Calyx lobes: length 1–1.5 times width, 1(–2) times tube, triangular to ovate, apex acute or acuminate to short-mucronate; involucellar bractlets 1/2–2/3 times calyx
|[[#key-0-5| > 5]]
|-id=key-0-5
|5
|Calyces sparsely bristly- or stellate-hairy, stellate hairs overlain by 1–few-armed, arms to 3 mm; flower clusters sessile, glomerate, inflorescences interrupted, spicate.
|[[Malacothamnus densiflorus|Malacothamnus densiflorus]]
|-id=key-0-5
|5
|Calyces sparsely hairy to densely stellate-hairy, if sparsely, not bristly, hairs usually 10–30-armed, arms 0.2–1.5 mm; flower clusters sessile or pedunculate, glomerate or loose, inflorescences non-interrupted, cymose, spicate, racemose, or open-paniculate
|[[#key-0-6| > 6]]
|-id=key-0-6
|6
|Leaf blades 2–6(–11) cm, usually thin, surfaces: adaxial usually gray-green and sparsely hairy, basal lobes not overlapping; branches usually slender.
|[[Malacothamnus fasciculatus|Malacothamnus fasciculatus]]
|-id=key-0-6
|6
|Leaf blades 5–11(–20) cm, thick, surfaces: adaxial tawny and densely stellate-hairy, basal lobes usually overlapping; branches usually stout.
|[[Malacothamnus davidsonii|Malacothamnus davidsonii]]
|-id=key-0-7
|7
|Calyces not angled and/or winged in bud, lobes usually triangular or deltate-lanceolate, apex long-acute to ± acuminate; indument densely lanate, white-lanate, or villous, or sublepidote to tomentose
|[[#key-0-9| > 9]]
|-id=key-0-8
|8
|Flower clusters usually glomerate; inflorescences not basally leafy, interrupted, spicate; calyx indument sparse, hairs usually 1–2–few-armed, bristly.
|[[Malacothamnus densiflorus|Malacothamnus densiflorus]]
|-id=key-0-8
|8
|Flower clusters glomerate to open; inflorescences usually basally leafy, interrupted or not, spicate or racemose; calyx indument dense, stellate-hairy, not bristly.
|[[Malacothamnus marrubioides|Malacothamnus marrubioides]]
|-id=key-0-9
|9
|Petals white, fading lavender; leaf blades 3- or 5-lobed, surfaces: adaxial glabrate, dark green.
|[[Malacothamnus clementinus|Malacothamnus clementinus]]
|-id=key-0-9
|9
|Petals pale pink to deep mauve; leaf blades unlobed or 3- or 5-lobed, surfaces: adaxial soft tomentose-white, pale ash green and velvety white or sparsely hairy and green
|[[#key-0-10| > 10]]
|-id=key-0-10
|10
|Inflorescences interrupted and spicate or narrow-paniculate to open-paniculate, flower clusters dense or loose, 6–10-flowered; branches stout or slender, not flexuous; leaf blades ovate, broadly ovate, suborbiculate, or reniform, 4–6(–11) cm.
|[[Malacothamnus fremontii|Malacothamnus fremontii]]
|-id=key-0-10
|10
|Inflorescences usually open-paniculate or subracemose, flower clusters loose, 3(–6)-flowered, sometimes flowers solitary; branches slender, flexuous; leaf blades ovate, ± rhombic, or suborbiculate, 2.5–4.5(–7) cm.
|[[Malacothamnus jonesii|Malacothamnus jonesii]]
|}
</div></div><!--

-->{{#Taxon:
name=Malacothamnus
|author=David M. Bates
|authority=Greene
|rank=genus
|parent rank=subfamily
|synonyms=
|basionyms=
|family=Malvaceae
|distribution=Calif.;nw Mexico.
|reference=bates1963a;benesh1999a;kearney1951a
|publication title=Leafl. Bot. Observ. Crit.
|publication year=1906
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V6/V6_511.xml
|subfamily=Malvaceae subfam. Malvoideae
|genus=Malacothamnus
}}<!--

-->[[Category:Treatment]][[Category:Malvaceae subfam. Malvoideae]]