Contains 2 accepted taxa overall.
Characteristics
Classification
Citation
HEDERA Linnaeus, Sp. Pl. 202. 1753.
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TYPE: Hedera helix Linnaeus Lectotypified by ?
Species
| Scientific Name | Common Name | Herbarium Specimens | Status | Photos |
|---|---|---|---|---|
| Hedera algeriensis | ALGERIAN IVY | Not Native | ||
| Hedera helix | ENGLISH IVY | Not Native |
Identification Key
1. Trichomes white to orangish, stellate, the arms longer than the central body
2
1. Trichomes orangish to reddish centrally, scale-like with a dentate or lobed margin, the sinuses shorter to subequal to the central body
4
2. Trichomes whitish to orangish, rotate-stellate, the central body (8) 17-27(44) percent of the trichome width; tetraploid
2. Trichomes white, multiangulate-stellate, the central body (3)7-13(24) percent of the trichome width; diploid
3
3. Leaves often heart-shaped
3. Leaves rarely heart-shaped
4. Adult leaf blades (0.8)1.5-2.6(5.3) times longer than wide, juvenile blades (0.8)1.1-1.5(2.3) times longer; central lobe of lobate leaves (1.1)1.8-3.6(6.5) cm wide, (0.3)1.1-2.5(5) times longer than wide; trichome central body (0.075)0.116-0.176(0.309) mm wide, (26)48-72(96) percent of trichome width (Asia group of ~4 species)
4. Adult leaf blades (0.8)1.1-1.7(3.8) times longer than wide, juvenile blades (0.8)0.9-1.1(1.5) times longer; central lobe of lobate leaves (0.9)2.9-5.3(9) cm wide, (0.4)0.6-1(2.9) times longer than wide; trichome central body (0.046)0.084-0.135(0.137) mm wide, (21)34-53(71) percent ot the trichome width (western Mediterranean basin group of ~5 species)
5
5. Adult leaves (1)1.2-2.8(3.3) times longer than wide; trichomes with 15-20(23) teeth; tetraploid
5. Adult leaves 1-1.1(1.5) times longer than wide; trichomes (7)11-16(24) teeth; diploid
Genus Synonyms
| Synonym | Full Citation | Basionym | Type |
|---|