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Volume IV (1988) - Flora of New Zealand Naturalised Pteridophytes, Gymnosperms, Dicotyledons
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Apium L.

APIUM L.

Glabrous annual, biennial or perennial herbs, usually with taproots, sometimes rooting at nodes. Lvs 1-3-pinnate; segments broad or narrow. Umbels usually compound, often ± sessile and lf-opposed, sometimes shortly pedunculate; bracts few and simple or 0; bracteoles several or 0. Petals white or greenish, regular, with entire, obtuse to acute, usually inflexed apex; calyx teeth minute or 0. Fr. ovoid-oblong to subglobose, slightly flattened laterally, not beaked, spinless; commissure narrow; ribs 5 per mericarp, equal, stout or slender; vittae solitary in furrows.

Key

1
Bracteoles present; aquatic or amphibious, rooting at nodes
2. *nodiflorum
Bracteoles 0; terrestrial or palustral, not rooting at nodes
2
2
Erect biennial; ribs in fr. filiform
1. *graveolens
Procumbent to ascending perennial; ribs of fr. broad and spongy
3. prostratum
A
Primary segments or leaflets denticulate, with (6)-10-20-(36) secondary segments per leaflet; leaflets 3-5
subsp. denticulatum
Primary segments of leaflets either 3-fid or 3-partite with (0)-3-9-(10) secondary segments per leaflet; leaflets 3, 5, or 7
B
B
Leaflets entire or divided; undivided leaflets and primary segments of divided leaflets ± linear or lanceolate with length (6)-7-12-(15) × width
subsp. prostratum var. prostratum
Leaflets divided; primary segments elliptic, ovate, obovate, or ± cuneate with length (0.5)-2-3× width
subsp. prostratum var. filiforme

c. 20 spp., Europe, Asia, Africa, S. America, Australasia. Native sp. 1, naturalised 2.

Treatment of indigenous Apium follows Short, P. S., J. Adelaide Bot. Gard. 1 : 205-235 (1979).

Fig. 11. Frs of Apium. A A. graveolens; B A. prostratum subsp. prostratum var. filiforme. © All rights reserved. [Image: 4X3N]
Fig. 11. Frs of Apium. A A. graveolens; B A. prostratum subsp. prostratum var. filiforme. © All rights reserved. [Image: 4X3N]
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