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HALORAGACEAE

WATER-MILFOIL FAMILY

Elizabeth McClintock

Annual, perennial herb, shrub, generally monoecious, generally aquatic
Leaves cauline, opposite, alternate, or whorled; submersed blades with pinnate, thread-like divisions; aerial leaves simple, entire to divided
Inflorescence: panicle, raceme, or spike; flowers 1 or clustered, short-pedicelled to ± sessile
Flower generally unisexual (bisexual in Haloragis ), small, biradial; calyx tube short, fused to ovary, lobes 2–4; petals generally 2–4; stamens 4 or 8, filaments generally short; ovary inferior, chambers 1–4, styles 2–4, separate, stigmas generally plumose
Fruit fleshy or nut-like, dehiscent or not
Seeds generally 1 per chamber
Genera in family: 6–8 genera, ± 100 species: especially s hemisphere, some cultivated.

HALORAGIS

Annual, perennial herb, small shrub, terrestrial
Stem erect
Leaves simple, alternate or opposite; blade lanceolate to round, entire, toothed, or lobed
Inflorescence: raceme or panicle, axillary; flower 1 or clustered
Flower bisexual; calyx lobes 2–4, persistent in fruit; petals 2–4; stamens 4 or 8, deciduous, filaments short; ovary 1–4-chambered, stigmas plumose
Fruit indehiscent, winged or ribbed
Species in genus: ± 70 species: s hemisphere
Etymology: (Greek: wetland plant with clustered fruits)
Reference: [Forde 1964 New Zealand J Bot 2:425–453]

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