Malacothamnus palmeri
Malacothamnus densiflorus
Palmer's bushmallow, Palmer's or Santa Lucia bushmallow, Santa Lucia bush mallow
dense-flower bushmallow, many-flower bush mallow, yellowstem bushmallow
blades ovate to broadly ovate, unlobed or 3- or 5-lobed, to 7–8 cm, thin or thick, surfaces: sparsely to densely grayish- to tawny-hairy, basal sinus open, not overlapping.
blades ovate, broadly ovate, or round, unlobed or 3- or 5-lobed, 3–6 cm, often leathery, surfaces: abaxial sometimes glossy green, adaxial densely tawny-hairy, basal sinus open, not overlapping.
terminal, headlike or, sometimes, short-spicate, flower clusters sessile, densely flowered, subtended by conspicuous bracts;
stipules marginally connate, enclosing young flower clusters;
involucellar bractlets distinct, sometimes basally adnate to calyx, linear to lanceolate, 8–16(–21) × 1–3(–5) mm, 2/3 –1 1/3 times calyx length.
interrupted, spicate, flower clusters sessile, glomerate, 10+-flowered;
involucellar bractlets awl-shaped to filiform, 5–15 × 1 mm, 2/3–1 1/2 times calyx length.
calyx (8–)10–16(–20) mm, lobes ovate to deltate-lanceolate, 5–15 × 2.5–5.5 mm, ca. 2 times as long as wide, slightly exceeding to 4 times tube length, apex acuminate, grayish- to tawny-hairy, hairs stellate, arms to 3.5 mm and sometimes simple-glandular;
petals rose-pink or pale pink to nearly white, 1.4–2(–3) cm.
calyx angled in bud, 6–14 mm, lobes triangular to ovate, 4–11 × 2.3–3.5(–5) mm, slightly less to slightly more than 2 times as long as wide, equaling to 3 times tube length, apex acute to acuminate, sparsely bristly-hairy, hairs 1–few-armed, to 3 mm;
petals pale pink, 1–2 cm.
2.5–4(–5) mm.
2.4–3.2 mm.
= 34.
= 34.
Malacothamnus palmeri
Malacothamnus densiflorus
Malacothamnus palmeri occurs in the central, outer Coast Ranges; its morphology is variable. Plants from Jolon and the Carmel Valley, Monterey County, have been called var. involucratus; they are recognized by cordate leaves, sparse indument (leaves adaxially glabrate), broad bracts to 20 mm wide subtending and partially enclosing the young flower clusters, relatively broad involucellar bractlets, calyx measurements in the lower range (to 1.5 cm), and nearly white petals 1–3 cm. They intergrade with the typical form and, in plants with short-spicate inflorescences, approach M. aboriginum. Plants from near Arroyo Seco, Monterey County, with simple and glandular hairs and generally darker rose petals have been named var. lucianus; they are otherwise similar to the typical variety.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Malacothamnus densiflorus occurs in the southern Coast Ranges. Plants with relatively short involucellar bractlets and calyx measurements in the lower range have been recognized as var. viscidus; intergradation with more typical forms is complete. Malacothamnus densiflorus intergrades with M. fasciculatus at lower elevations of the coastal Peninsula Ranges in San Diego County.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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