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Volume I (1961) - Flora of New Zealand Indigenous Tracheophyta - Psilopsida, Lycopsida, Filicopsida, Gymnospermae, Dicotyledons
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Caltha L.

CALTHA L., 1753

Fls few to 1, perfect, regular, hypog. Sepals 5-10, petaloid, yellow or white; petals 0; stamens ∞; carpels 5-11, ovules several in 2 series. Fruit of a few follicles, each with several to many seeds. Perennial herbs with creeping rhizomes and ± cordate radical lvs. About 20 spp. of temperate regions. The N.Z. spp. are endemic and belong to the section Psychrophila as defined by Hill (Ann. Bot., Lond. 32, 1918, 421-422).

Key

1
Lf margins shallowly sinuate to entire; sepals linear-subulate, yellow
1. novae-zelandiae
Lf margins distinctly crenate; sepals ± oblong-obovate, obtuse, white
2. obtusa
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