Flora of North America species comparison

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Malacothamnus jonesii

Jones' bush-mallow, San Luis obispo or Jones' bushmallow, slender bushmallow
Habit Shrubs, 1–2.5 m, branches slender, flexuous, indument white, usually velvety, not shaggy, stellate hairs stalked, sometimes sublepidote, ca. 10–30-armed, glandular hairs often abundant.
Leaf

blades ash green, ovate, ± rhombic, or suborbiculate, unlobed or 3- or 5-lobed, 2.5–4.5(–7) cm, thin to thick, surfaces: soft tomentose-white, adaxial pale ash green, white-velvety, basal sinus open, not overlapping.
Inflorescences

open-paniculate or subracemose, flower clusters pedunculate, loose, 3(–6)-flowered, or solitary flowers;

involucellar bractlets awl-shaped to filiform, 2.5–7(–8) × 1 mm, 1/3–1/2(–2/3) calyx length.
Flowers

calyx campanulate, not angled in bud, 5–9(–10) mm, lobes distinct in bud, narrowly triangular or deltate-lanceolate, 3–6(–7.5) × 1.5–3(–4) mm, length 2 times width, equaling to 3 times tube length, apex acute to short-acuminate, usually sublepidote to tomentose, hairs 10–30-armed, sometimes densely lanate;

petals pale pink, to 1 cm.
Mericarps

2.5–3.8 mm.
2n

= 34.

Malacothamnus jonesii
Phenology Flowering late Apr–Jun.
Habitat Open chaparral, foothill woodlands
Elevation 200–900 m (700–3000 ft)
Distribution
from FNA
CA
[WildflowerSearch map]
[BONAP county map]
Discussion

Malacothamnus jonesii is known from the central Coast Ranges.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 6, p. 284.
Parent taxa Malvaceae > subfam. Malvoideae > Malacothamnus
Sibling taxa
M. abbottii, M. aboriginum, M. clementinus, M. davidsonii, M. densiflorus, M. fasciculatus, M. fremontii, M. marrubioides, M. palmeri
Synonyms Malvastrum jonesii, M. gracilis, M. niveus, Malvastrum fremontii var. niveum, M. gracile, M. niveum
Name authority (Munz) Kearney: Leafl. W. Bot. 6: 135. (1951)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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