Umbilicus DC.

3. Umbilicus DC. View in CoL 1

Perennials, with tuberous or rhizomatous rootstock. Basal leaves petiolate, usually suborbicular, at least 2 cmin diameter, glabrous. Cauline leaves much smaller. Flowers 5-merous, numerous, in a terminal, bracteate raceme or panicle. Calyx small. Corolla tubular or campanulate, distinctly sympetalous; lobes more or less erect. Stamens 10 (rarely 5), epipetalous; filaments short. Follicles slender; styles rather short or absent.

1 Lobes of corolla as long as or longer than the tube

2 Flowers 9-13 mm; lobes of corolla about equalling the tube

3. erectus 2 Flowers 3-6 mm; lobes of corolla considerably longer than the tube

3 Flowers 4-6 mm, obconical; carpels gradually tapered to a straight, fairly long style 1. parviflorus 3 Flowers 3-4 mm, campanulate or subglobose; carpels abruptly narrowed to a very short, curved style 2. chloranthus 1 Lobes of corolla considerably shorter than the tube

4 Corolla bright yellow, conspicuously constricted at the mouth of the tube; stamens usually 5 6. heylandianus 4 Corollapaleyellow, greenishorreddish, scarcely constricted at the mouth of the tube; stamens 10

5 Flowers usually pendent; raceme occupying more than half the stem; corolla-lobes ovate, mucronate 4. rupestris 5 Flowers horizontal; raceme occupying not more than half the stem; corolla-lobes lanceolate, acute 5. horizontalis