The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

island mallow, malva rosa

bull mallow

Habit Shrubs, 1–4 m, stellate-hairy to glabrate. Herbs, annual or biennial, 0.2–0.6 m, sparsely to densely hairy, hairs both simple and stellate.
Stems

erect to decumbent, base woody.

procumbent or trailing to ascending, villous-hirsute.

Leaves

stipules early-deciduous, lanceolate to ovate, 2–4 × 0.6–1.5 mm, minutely stellate-puberulent;

petiole as long as or longer than blade;

blade free filaments 1–2 mm;

anthers on distal 1/2;

style 6–10-branched (same number as locules), purplish;

stigmas 6–10 (same number as locules), purplish.

stipules persistent, ovate to broadly ovate, 4–6 × 3–5 mm;

petiole 2–5 times as long as blade;

blade semicircular or reniform, 2–4 × 2–4 cm, sometimes to 12 cm in young plants, base cordate to nearly truncate, distalmost leaves sometimes wide-cuneate, margins crenate or dentate, undulate, or with 5–7 shallow, lobes, apex obtuse, rounded, or acute, surfaces sparsely hairy, hairs simple.

Inflorescences

stellate;

petals pink to lavender, drying bluish, usually with darker veins, 5–15 mm, subequal to or length slightly less than 2 times calyx, glabrous or nearly so;

staminal column 2–2.5(–3) mm, densely, retrorsely puberulent, hairs simple;

style 7–10-branched;

stigmas 7–10.

Seeds

dark brown, 4 mm, nearly as thick as long, notch slight.

dark brown, 2–2.5 mm.

Schizocarps

12–16 mm diam.;

mericarps 6–10, 6–7 mm, apical face and margins sharp-edged, surfaces smooth to faintly ribbed, glabrous or puberulent on apical surface.

6–7 mm diam.;

mericarps 7–10, 3 mm, thick, as wide as long, margins sharp-angled but not winged, conspicuously, deeply reticulate-pitted apically, surfaces densely hirsute or glabrous.

2n

= ca. 40.

= 42.

Malva assurgentiflora

Malva nicaeensis

Phenology Flowering Feb–Jun and Sep–Oct, sporadically year-round. Flowering year-round.
Habitat Coastal bluffs, disturbed areas Disturbed sites
Elevation 0–400 m (0–1300 ft) 0–400(–1200) m (0–1300(–3900) ft)
Distribution
from FNA
CA [Introduced in Mexico, Central America (Guatemala), South America (Bolivia, Chile, Ecuador, Peru), Pacific Islands (New Zealand), Australia]
[WildflowerSearch map]
[BONAP county map]
from FNA
AL; CA; s Europe; w Asia; n Africa [Introduced in North America; introduced also in Mexico, South America (Argentina, Chile), Atlantic Islands (Macaronesia), Pacific Islands (New Zealand), Australia]
[WildflowerSearch map]
[BONAP county map]
Discussion

Malva assurgentiflora, traditionally placed in Lavatera, has long been cultivated as an ornamental or windbreak in California and is native only on the Channel Islands. It has become naturalized on the mainland as well as in Mexico and sparingly elsewhere. The shrubby habit, large flowers with dark-veined petals, and thick, hemispheric, fruits make it distinctive; it is our only native species of Malva. The petals are often recurved with age, and the corky mericarps float and are tolerant of salt water. Further study may indicate that there are two distinct subspecies, as suggested by R. N. Philbrick (1980).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Malva nicaeensis has been collected as a waif in Massachusetts and New Jersey and has been reported in British Columbia and Montana; vouchers have not been found. One vouchered collection has been reported from Mobile County, Alabama. In the flora area, it is found most commonly in the Mediterranean climate of California. It may not be established elsewhere within our range. In some older treatments it was identified as or included within M. rotundifolia, a name rejected because of its inconsistent use for this as well as for M. pusilla and other species. It is similar to M. sylvestris, except for its decumbent habit and smaller flowers.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 6, p. 288. FNA vol. 6, p. 290.
Parent taxa Malvaceae > subfam. Malvoideae > Malva Malvaceae > subfam. Malvoideae > Malva
Sibling taxa
M. alcea, M. arborea, M. moschata, M. neglecta, M. nicaeensis, M. parviflora, M. pseudolavatera, M. pusilla, M. sylvestris, M. verticillata
M. alcea, M. arborea, M. assurgentiflora, M. moschata, M. neglecta, M. parviflora, M. pseudolavatera, M. pusilla, M. sylvestris, M. verticillata
Synonyms Lavatera assurgentiflora, L. assurgentiflora subsp. glabra, Saviniona assurgentiflora, S. clementina, S. reticulata
Name authority (Kellogg) M. F. Ray: Novon 8: 290. (1998) Allioni: Fl. Pedem. 2: 40. (1785)
Web links