2102:(A) (orig. 2103 )
previous:B
previous:158
Plants herbaceous, terrestrial or twining. Stems with scales, distinct leaves absent.
next:2103
2102:(B)
Plants woody, or thick fleshy, or herbaceous, in the latter case either green leaves present, or plants epiphytic, hemi-parasitic and erect.
next:2107
2103:(A) (orig. 2104 )
previous:2102
Stems twining. Parasites with haustorial organs on the stems.
next:2104
2103:(B)
Stem erect. Saprophytes.
next:2105
2104:(A) (orig. 2105 )
previous:2103
Petals connate. Filaments adnate to the corolla-tube, alternipetalous. Anthers longitudinally dehiscing with slits. Fruit a capsule. Seeds 1-4. (Cuscutaceae)
Cuscutaceae
2104:(B)
Petals free. Filaments free from the corolla, in 3 whorls of three and epipetalous, or more. Anthers dehiscing with an apical valve. Fruit 1-seeded, surrounded by a fleshy receptacle. Sepals 3. (Cassytha)
2105:(A) (orig. 2106 )
previous:2103
Scales on the stem opposite. Corolla-lobes contort or 4-lobed (2 inner and 2 outer lobes) Filaments adnate to the corolla-tube.
2105:(B)
Scales on the stem alternate. Petals or corolla-lobes imbricate, not contort. Filaments free from the corolla.
next:2106
2106:(A) (orig. 2107 )
previous:2105
Sepals 2-6. Petals absent or 3-6, free or connate. Ovary 1-6-locular. Ovules many, axillary or parietal.
2106:(B)
Sepals 5. Petals 3. Ovary 2-locular. Ovule 1 per locule, pendulous. Indomalesia, Australia. (Salomonia)
2107:(A) (orig. 2108 )
previous:2102
Plants with chlorophyll, rarely without, then flowers either on branched stems, or in compound inflorescences. Usually epiphytic hemi-parasites. Fruit 1-seeded.
next:2108
2107:(B)
Plants without chlorophyll, usually parasiting on roots, if epiphytic, then flowers emerging solitary from the host's branches. Fruit many seeded.
next:2112
2108:(A) (orig. 2109 )
previous:2107
Flowers unisexual, the male flowers consisting of a group of up to 3 stamens. Fruit dry, with 3 feather-like bristles. Epiphytic, shrubby, green parasites on Nothofagus. Temperate S. America.
2108:(B)
Flowers bisexual or unisexual, in the latter case the male flowers either with a perianth, or (Antidaphne) consisting of a group of 4 stamens. Fruit usually fleshy, without feather-like bristles.
next:2109
2109:(A) (orig. 2110 )
previous:2108
At least the bisexual or female flowers with a rim-like calyx (calyculus) below the corolla. Flowers usually brightly coloured and usually bisexual, if flowers unisexual then plants dioecious.
2109:(B)
Calyx or calyculus absent. Plants monoecious or dioecious. Flowers usually inconspicuous, greenish.
next:2110
2110:(A) (orig. 2111 )
previous:2109
Leaves usually decussate. Flowers in cymes or produced from the stem, not the leaf-axils (Tropical America, West Indies: Dendrophtora, Phoradendron) Anthers usually sessile or cohering.
2110:(B)
Leaves usually alternate. Flowers in axillary or terminal racemose inflorescences. Anthers neither sessile, nor cohering.
next:2111
2111:(A) (orig. 2112 )
previous:2110
Plants attached by means of large, distinct primary haustoria, sometimes also with secondary haustoria on creeping roots. Fruitwall without conspicuous longitudinal fibres. S. America, Mexico, Caribbean.
2111:(B)
Plants without a distinct primary haustorium. Branches either leafy or with scales and then originating from endophytic parts. Fruitwall with conspicuous longitudinal fibres. S.E. Asia, New Guinea.
2112:(A) (orig. 2113 )
previous:2107
Flowers distinctly zygomorphic.
next:2113
2112:(B)
Flowers actinomorphic.
next:2114
2113:(A) (orig. 2114 )
previous:2112
Ovary 2-locular. Primary haustorium present or absent. Subterranean stem often branched. Old World.
2113:(B)
Ovary 1-locular, rarely incompletely divided into locules. Primary haustorium present. Subterranean stem usually simple. World-wide.
2114:(A) (orig. 2115 )
previous:2112
Ovule 1, or indistinct and fused with the ovary wall. Flowers unisexual, in club-shaped or disk-shaped inflorescence.
2114:(B)
Ovules more than 10 and distinct. Flowers unisexual or bisexual.
next:2115
2115:(A) (orig. 2116 )
previous:2114
Flowers either in inflorescences, or solitary and emerging apparently directly from the host, then rhizome-like subterranean parts absent.
next:2116
2115:(B)
Flowers solitary, emerging from a coarse, rhizome-like, subterranean part of the parasite. Madagascar, S. Africa, S. America.
2116:(A) (orig. 2117 )
previous:2115
Flowers in branched inflorescences. Stamens adnate to the corolla, with distinct filaments. Ovules less than 16. Dry habitats in America.
2116:(B)
Flowers either solitary or in simple spikes. Anthers sessile on a central column, without distinct filaments. Ovules numerous.