Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
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MALVACEAE

MALLOW FAMILY

Steven R. Hill, except as specified

Annual, perennial herb, shrubs, trees, generally stellate-hairy; juice sticky; inner bark tough, fibrous
Leaves alternate, simple, petioled; blade generally palmately veined or lobed, stipules present
Inflorescence often leafy; whorl or involucre of bractlets often subtending calyx
Flower generally bisexual, radial; calyx lobes 5, margins abutting in bud; petals 5, free (fused at base to filament tube, so falling together); stamens many, filaments fused into a tube surrounding style, tube fused in turn to petal bases; pistil 1, ovary superior, chambers generally 5 or more, style branches, stigmas generally 1 or 2 X as many as chambers
Fruit of 5–many disk- or wedge-shaped segments, loculicidal capsule, or berry
Genera in family: 100 genera, 2000 species: worldwide, especially warm regions; some cultivated (e.g., Abelmoschus , okra; Alcea ; Gossypium , cotton; Hibiscus , Malvaviscus )
Recent taxonomic note: Recently treated to include Sterculiaceae [Angiosperm phylogeny Group 1998 Ann Missouri Bot Gard 85:531–553; Alverson et al. 1999 Amer J Bot 86:1474–1486; Bayer et al. 1999 Bot J Linn Soc 129:267–303]
Mature fruit important for identification.

LAVATERA

TREE-MALLOW, MALVA ROSA

Annual, biennial, perennial herb, shrub, generally stellate-hairy
Stem generally soft-woody
Leaf: blade generally lobed
Inflorescence: pedicel jointed above middle; bractlets subtending calyx 3, fused at base into an involucre
Flower showy; petals rose-purple or white, generally dark-veined, generally reflexed in age; stigmas linear
Fruit ± disk-like; segments 6–10, smooth
Seed 1 per fruit segment
Species in genus: 25 species: ChI, Baja CA, Medit, Australia; naturalized elsewhere
Etymology: (Lavater brothers, 17th century Swiss physicians, naturalists)
Reference: [Fernandes 1968 Fl Eur 2:251–253]

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