Malacothamnus marrubioides

(Durand & Hilgard) Greene

Leafl. Bot. Observ. Crit. 1: 208. 1906.

Common names: Pink-flowered bushmallow
Basionym: Malvastrum marrubioides Durand & Hilgard Pl. Heermann., 38. 1854
Synonyms: M. gabrielense Munz & I. M. Johnston
Treatment appears in FNA Volume 6. Treatment on page 284. Mentioned on page 281.

Subshrubs, 1–2 m, branches slender, indument tawny, moderately dense, often viscid, not shaggy, stellate hairs sessile or stalked, not bristly, few–many-armed, glandular-hairs usually abundant. Leaf-blades broadly ovate or suborbiculate, unlobed or 3-lobed or 5-lobed, 3–6 (–8) cm, surfaces: moderately to copiously hairy, hairs grayish to tawny, 10–30-armed, basal sinus open, not overlapping. Inflorescences usually short, interrupted, spicate to racemose, flower clusters sessile or short-pedunculate, glomerate to open, usually leafy; involucellar bractlets filiform, 5–13 × 1 mm, mostly 2/3 to equaling calyx length. Flowers: calyx angled or slightly winged in bud, 7–15 mm, lobes lanceolate, triangular, or ovate, 4.5–12 × 1.7–3 (–4) mm, 2–3 times as long as wide, 2–3 times tube length, apex long-acuminate, densely stellate-hairy, hairs many-armed; petals pink, to 2 cm. Mericarps 2–3.2 mm. 2n = 34.


Phenology: Flowering Apr–Jun(–Aug).
Habitat: Chaparral, washes, hillsides
Elevation: 400–1100 m

Distribution

V6 518-distribution-map.jpg

Calif., Mexico (Baja California)

Discussion

Malacothamnus marrubioides is reported from lower elevations of the Sierra Nevada, and is known otherwise from the Transverse Ranges of southern California and Coast Ranges of Baja California.

Selected References

None.

Lower Taxa

None.

No values specified.

loculicidal +
stellate-hairy +
David M. Bates +
(Durand & Hilgard) Greene +
not overlapping +
cordate +  and truncate or cuneate +
Malvastrum marrubioides +
6 cm60 mm <br />0.06 m <br /> (8 cm80 mm <br />0.08 m <br />) +
3 cm30 mm <br />0.03 m <br /> (6 cm60 mm <br />0.06 m <br />) +
5-lobed;3-lobed;unlobed;suborbiculate;ovate;5-lobed;3-lobed;unlobed;suborbiculate;ovate +
ovate +  and round rhombic or reniform unlobed or palmately 3-lobed 5-lobed or 7-lobed +
0.5 cm5 mm <br />0.005 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
1 cm10 mm <br />0.01 m <br /> (?) +
slender +
not accrescent +
0.7 cm7 mm <br />0.007 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
indehiscent +  and loculicidal +
Pink-flowered bushmallow +
white +, usually rose +  and pale-pink pinkish mauve or mauve +
Calif. +  and Mexico (Baja California) +
400–1100 m +
sparse;copious +
subterminal +
leafy +, short-pedunculate glomerate +  and open +
unisexual +  and bisexual +
subglobose-obovate +, disclike +  and not inflated +
Chaparral, washes, hillsides +
many-armed +, 10-30-armed +, few-many-armed +, stalked +  and sessile +
grayish +  and tawny +
not bristly +
bifurcate +
spicate +  and interrupted +
tough-fibrous +
connate +  and distinct +
simple +, stipulate +, sessile +, subsessile +  and petiolate +
distichous +  and alternate +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
ovate +, triangular +  and lanceolate +
1.7mm;3mm +
entire +  and serrate +
smooth-walled +  and 1-celled +
asymmetrically suborbicular +  and obovoid-reniform +
0.2 cm2 mm <br />0.002 m <br /> (0.32 cm3.2 mm <br />0.0032 m <br />) +
7-14-carpellate +
adnate +  and distinct +
0 cm0 mm <br />0 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Flowering Apr–Jun(–Aug). +
Leafl. Bot. Observ. Crit. +
minutely stellate-hairy or rarely glabrous +  and papillate-stellate +
Black (?) +  and Brown (?) +
hairy +  and glabrous +
obovoid-reniform +
persistent +
sessile +  and subsessile +
ascending;erect +
filiform +, linear +  and capitate +
1-2 times number of carpels +
? (?) +  and ? (?) +
7-14-branched +
M. gabrielense +
Malacothamnus marrubioides +
Malacothamnus +
species +
glabrate +  and densely hairy +
monoecious +, dioecious +  and hermaphroditic +