1944:(A)
previous:1896
Fertile stamens as many as the corolla-lobes, rarely more, then stamens 3 or 4.
next:1945
1944:(B)
Fertile stamens more than the corolla-lobes, 5-more.
next:1994
1945:(A)
previous:1944
Ovary apically completely closed.
next:1946
1945:(B)
Ovary apically open. Herbs. Petals 2, fimbriate. Stamens 3, excentric. Ovary 1-locular. Stigmas 4, sessile. Ovules numerous. (Oligomeris, Resedella)
1946:(A)
previous:1945
Stamens as many as the corolla-lobes, epipetalous.
next:1947
1946:(B)
Stamens as many as the corolla-lobes, alternipetalous, or more, then stamens 3 or 4.
next:1950
1947:(A)
previous:1946
Flowers usually bisexual.
next:1948
1947:(B)
Flowers unisexual. Woody plants. Male flowers with a 2-8-lobed corolla and connate filaments. Female flowers with 1 or 2 petals or 2 corolla-lobes and 3 stigmas. Ovule 1, pendulous. Fruit a drupe. Endosperm scanty.
1948:(A)
previous:1947
Inflorescence-axis without a calycoid involucre. Corolla imbricate. Fruit a capsule. Herbs or undershrubs.
next:1949
1948:(B)
Inflorescence-axis often with a calycoid involucre. Perianth-segments 4, valvate. Fruit a nut or a drupe, or a follicle, or a capsule. Plant usually woody. Stigma 1. Endosperm absent.
1949:(A)
previous:1948
Stigma 1. Ovules 2-more. Small, ericoid undershrubs. Mediterranean, N.E. Africa. (Coridaceae)
Coridaceae
1949:(B)
Stigmas 5. Ovule 1. Sepals with long glandular hairs. (Plumbago)
1950:(A)
previous:1946
Ovary 1-locular or nearly so.
next:1951
1950:(B)
Ovary completely 2-more-locular or nearly so, or ovaries 2-more, free.
next:1962
1951:(A)
previous:1950
Ovule 1.
next:1952
1951:(B)
Ovules 2-more. Corolla-lobes 3-8, imbricate.
next:1954
1952:(A)
previous:1951
Corolla-lobes 3 or 4, imbricate. Stamens 4. Stigmas I or 2, without a cupular involucre. N. temperate zone.
next:1953
1952:(B)
Corolla-lobes 5, valvate. Stamens 5. Stigma 1, surrounded by a cupular involucre. Herbs. Leaves radical. Flowers in capitules. Ovule basal. Anthers with 2 longitudinal slits. Australia.
1953:(A)
previous:1952
Leaves opposite. Flowers in spikes. Anthers with 2 longitudinal slits. Stigmas 2. Ovule erect, atropous.
1953:(B)
Leaves alternate. Flowers in capitules. Anthers with transversal slit. Ovule pendulous, anatropous.
1954:(A)
previous:1951
Ovules 5 -more.
next:1955
1954:(B)
Ovules 2-4.
next:1956
1955:(A)
previous:1954
Leaves undivided. Style 1, stigmas 1 or 2.
next:1958
1955:(B)
Leaves usually divided. Style 2-fid. Herbs. Corolla nearly actinomorphic. Stamens 5.
1956:(A)
previous:1954
Anthers with longitudinal slits.
next:1957
1956:(B)
Anthers with 1 terminal pore. Perennial herbs or shrubs. Leaves usually densely pubescent. Sepals 4 or 5, unequal, free, imbricate. Ovules 2, collateral, parietal, pendulous. Fruit indehiscent with bristles or spines. Endosperm absent. America.
1957:(A)
previous:1956
Leaves opposite or in whorls. Ovary incompletely 1-locular.
1957:(B)
Leaves alternate. Ovary completely 1-locular. Flowers in fascicles. Cuba. (Goetzeaceae: Henoonia)
Goetzeaceae
1958:(A)
previous:1955
Plants autotrophic. Leaves green.
next:1959
1958:(B)
Plants parasitic, non-green. Herbs. Leaves scale-like. Flowers solitary, or in spikes, or in racemes. Stamens 4. Endosperm copious. Embryo indistinct.
1959:(A)
previous:1958
Woody plants. Stipules or a stipular sheath present.
next:1960
1959:(B)
Plants usually herbaceous. Stipules absent.
next:1961
1960:(A)
previous:1959
Leaves alternate. Flowers in spikes, or in racemes. Stamens 51, connate at base. Fruit a capsule.
1960:(B)
Leaves opposite. Flowers in cymes. Stamens 5-8(-16), adnate to the corolla-tube. Fruit a berry. (Potaliaceae)
Potaliaceae
1961:(A)
previous:1959
Leaves opposite, entire. Corolla nearly actinomorphic, usually contort. Stigma 2-lobed. Endosperm copious.
1961:(B)
Leaves various. Corolla usually zygomorphic, often bilabiate, imbricate. Style 1, stigma capitate or 2-lobed. Endosperm scanty or absent.
1962:(A)
previous:1950
Ovary 2- or 3-locular, or ovaries 2, free at base but connate by the styles.
next:1963
1962:(B)
Ovary 4-20-locular, or ovaries 4 or 5, free.
next:1967
1963:(A)
previous:1962
Ovary 2- or 3-locular.
next:1964
1963:(B)
Ovaries 2, free at base but connate by the styles. Herbs. Leaves opposite. Corolla valvate. Stamens connate into a ring and adnate to the style-apex. Pollen united into pollinia. (Ceropegia)
1964:(A)
previous:1963
Ovary 3-locular.
next:1965
1964:(B)
Ovary 2-locular.
next:1968
1965:(A)
previous:1964
Anthers with 2 longitudinal slits. Stigmas 3.
next:1966
1965:(B)
Anthers with 1 pore. Stigma 1. Woody plants. Stipules absent.
1966:(A)
previous:1965
Woody plants. Stipules present, often minute.
1966:(B)
Herbs. Stipules absent.
1967:(A)
previous:1962
Leaves simple or ovary divided. Embryo usually straight.
next:1989
1967:(B)
Leaves compound, 1-7-foliolate, translucent-glandular-punctate. Ovary 2-4-partite. Ovules 2 per locule. Embryo usually curved.
1968:(A)
previous:1964
Leaves alternate, at least the upper, sometimes in pairs but not opposite, or all radical.
next:1969
1968:(B)
Leaves opposite or in whorls.
next:1975
1969:(A)
previous:1968
Style undivided, if 2-partite plants woody and endosperm absent.
next:1970
1969:(B)
Style 2-partite. Herbs. Leaves usually undivided. Flowers 5-merous. Endosperm present.
1970:(A)
previous:1969
Ovules 2 per locule. Woody plants. Leaves undivided.
next:1971
1970:(B)
Ovules 4-more, rarely 1 per locule.
next:1973
1971:(A)
previous:1970
Stipules absent. Flowers solitary or in terminal few-flowered racemes. Corolla 5-lobed.
next:1972
1971:(B)
Stipules present, often inconspicuous. Flowers in fascicles. Stigmas 2.
1972:(A)
previous:1971
Plants usually climbing with tendrils. Flowers solitary. Corolla plicate. Stigma 1.
1972:(B)
Erect woody plants. Flowers solitary or in terminal few-flowered racemes. Corolla valvate. Stigmas 2. Cuba. (Goetzeaceae: Espadaea)
Goetzeaceae
1973:(A)
previous:1970
Stigmas 2.
next:1974
1973:(B)
Stigma 1.
next:1976
1974:(A)
previous:1973
Leaves simple. Endosperm present.
1974:(B)
Leaves 1-3-foliolate. Endosperm absent. Woody plants. Filaments free. Seeds winged.
1975:(A)
previous:1968
Stamens adnate to the corolla.
next:1982
1975:(B)
Stamens free from the corolla. Shrublets. Leaves in whorls. Stamens 4.
1976:(A)
previous:1973
All anthers or filaments connate or nearly so.
next:1977
1976:(B)
Anthers all free, -or connate in pairs and stamens adnate to the corolla.
next:1978
1977:(A)
previous:1976
Anthers 5, all connate, with 2 introrse slits. Ovules numerous. Corolla usually valvate. Embryo straight. (Lobeliaceae)
1977:(B)
Filaments usually completely connate, anthers free, erect, with 1 pore. Ovule 1 per locule. Stigma 1.
1978:(A)
previous:1976
Ovule 1 per locule.
next:1979
1978:(B)
Ovules numerous per locule.
next:1980
1979:(A)
previous:1978
Filaments free from the corolla. Endosperm absent. Leaves undivided or lobed. Anthers with 2 longitudinal slits. Stigma 1.
1979:(B)
Filaments adnate to the corolla. Endosperm present.
1980:(A)
previous:1978
Corolla imbricate, not plicate. Sept of the ovary at a right angle to the plane of symmetry of the flower. Fruit dehiscing longitudinally or with pores, rarely indehiscent, then seeds 1 or 2. Embryo straight or slightly curved.
next:1981
1980:(B)
Corolla usually valvate or plicate, then sometimes also imbricate, rarely imbricate but not plicate, then fruit with a lid or indehiscent and seeds many and embryo usually strongly curved. Sept of the ovary usually oblique to the plane of symmetry of the flower. Endosperm present.
1981:(A)
previous:1980
Seeds winged. Endosperm absent. Shrubs. Leaves usually 1- or 3-foliolate. Fruit a capsule with 2 valves. Tropical Africa to S. Africa, Madagascar. (Catophractes, Rhigozum)
1981:(B)
Seeds not winged. Endosperm present. Fruit dehiscing longitudinally or with pores, rarely indehiscent.
1982:(A)
previous:1975
Stipules or a stipular sheath absent.
next:1983
1982:(B)
Stipules or a stipular sheath present. Leaves undivided or lobed. Flowers nearly actinomorphic. Ovules numerous per locule. Endosperm present.
1983:(A)
previous:1982
Corolla imbricate.
next:1984
1983:(B)
Corolla valvate. Leaves in whorls. Corolla 5-lobed. Filaments and anthers connate.
1984:(A)
previous:1983
Seeds sessile or on a short hardly indurated funicle.
next:1985
1984:(B)
Seeds on elongated, indurated, more or less hook-shaped funicles. Fruit a loculicid capsule. Endosperm absent. (Acantheae)
1985:(A)
previous:1984
Ovules either 1 per locule, or 2 and collateral. Micropyle and radicle directed downwards.
next:1986
1985:(B)
Ovules either 1 per locule, or 2 and serial, or more. Micropyle and radicle directed upwards. Endosperm copious.
next:1988
1986:(A)
previous:1985
Flowers in capitules with an involucre of 5, or 6, or 2 deeply 3-lobed bracts. Lianas. Endosperm absent. S.E. Asia. (Symphoremataceae: Sphenodesme)
Symphoremataceae
1986:(B)
Flowers rarely in capitules, then without such an involucre.
next:1987
1987:(A)
previous:1986
Erect shrubs. Flowers in axillary, spike-like cincinni. Endosperm present. Madagascar. (Dicrastylidaceae: Acharitea)
Dicrastylidaceae
1987:(B)
Plants otherwise. Endosperm absent.
1988:(A)
previous:1985
Style undivided.
1988:(B)
Style 2-partite. Flowers 5-merous, nearly actinomorphic.
1989:(A)
previous:1967
Ovary 4-locular, or ovaries 4, free.
next:1990
1989:(B)
Ovary 5-20-locular. Woody plants. Leaves alternate, undivided. Stamens 5 - 10, free from the corolla. Anthers with apical pores. Ovules many per locule.
1990:(A)
previous:1989
Ovules many per locule.
next:1991
1990:(B)
Ovule 1 per locule.
next:1992
1991:(A)
previous:1990
Leaves alternate, undivided or lobed. Tendrils absent. Flowers solitary. Corolla nearly actinomorphic. Stamens 5. Seeds not winged. Endosperm present.
1991:(B)
Leaves opposite, deeply incised, Tendrils present. Flowers in spikes. Corolla bilabiate. Stamens 4. Seeds usually winged. Endosperm absent.
1992:(A)
previous:1990
Leaves opposite or in whorls, very rarely alternate, then ovary undivided. Ovules atropous or apotropous, micropyle and radicle pointing downwards.
next:1993
1992:(B)
Leaves alternate. Ovules epitropous, micropyle and radicle pointing upwards or to the axis, rarely downwards. Leaves undivided, usually hispid. Flowers usually in secund cincinni. Ovary deeply partite.
1993:(A)
previous:1828
previous:1992
Flowers usually in false whorls. Ovary deeply divided, usually to the base, rarely less, but still distinctly lobed, completely locular and then, as casual, mericarps dry. Ovule basal, rarely inserted somewhat higher up or in the middle.
1993:(B)
Flowers in spikes, or in racemes, or in capitules. Ovary undivided or nearly so, rarely distinctly lobed, then initially incompletely locular. Ovule pendulous or laterally attached, inserted in the middle or above, rarely basal. Mericarps drupaceous.
1994:(A)
previous:1944
Ovary 1-locular.
next:1995
1994:(B)
Ovary 2-20-locular. Leaves usually undivided.
next:1999
1995:(A)
previous:1994
Leaves usually undivided. Stipules absent or nodes with an annular gland.
next:1996
1995:(B)
Leaves usually compound. Stipules present. Stamens 10. Filaments free. Anthers with 2 longitudinal slits. Ovules 2-8.
1996:(A)
previous:1995
Bark inside with tough silky fibres. Corolla slightly developed, more or less annular. Ovule 1.
1996:(B)
Bark inside without such fibres. Corolla well developed.
next:1997
1997:(A)
previous:1996
Stamens free or connate, not on an androgynophore, all fertile.
next:1998
1997:(B)
Stamens on an androgynophore, 4 fertile and 4 or 5 staminodial]. Ovule 1, basal. Australia. (Emblingiaceae)
Emblingiaceae
1998:(A)
previous:1997
Woody plants. Leaves simple. Sepals and corolla-lobes 5. Stamens usually 8, never 6, at base adnate to the corolla. Tropics (Xanthophyllaceae)
Xanthophyllaceae
1998:(B)
Herbs. Leaves compound. Sepals 2. Corolla-lobes 4. Stamens 6, free from the corolla. Temperate regions. (Fumariaceae)
Fumariaceae
1999:(A)
previous:1994
Ovule 1 per locule.
next:2000
1999:(B)
Ovules 2-more per locule. Stem woody.
next:2002
2000:(A)
previous:1999
Filaments connate. Stamens 7 or 8. Anthers with 1 pore or with longitudinal slits. Style 1.
2000:(B)
Filaments free. Leaves undivided. Stamens 6 - 10. Anthers with 2 longitudinal slits.
next:2001
2001:(A)
previous:2000
Bark of twigs inside with tough silky fibres. Stem woody. Style 1. Stipules absent. Stamens 8 - 10.
2001:(B)
Bark of twigs without such fibres. Herbs. Styles 3. Flowers unisexual. Stamens 6 - 10.
2002:(A)
previous:1999
Leaves usually digitately compound. Stipules present. Flowers 5-merous.
2002:(B)
Leaves simple. Stipules absent. Stamens 6-18. Anthers with 2 apical pores, exceptionally with 1 longitudinal slits. Ovules 2-more per locule.