9.almost rosids to rosids
DESCRIPTION
9.Almost Rosids to Rosids. Santalales. Lots of parasitism Polyacetylenes 1-seeded ovules, pendulous and free-central placentation Molecules In ours, flowers not prominent Families not on required list. “Santalaceae”. Hemiparasites Root parasites. Viscaceae. Epiphytic parasites - PowerPoint PPT PresentationTRANSCRIPT
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9. Almost Rosids to Rosids
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Santalales Lots of parasitism Polyacetylenes 1-seeded ovules, pendulous and
free-central placentation Molecules In ours, flowers not prominent Families not on required list
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“Santalaceae” Hemiparasites Root parasites
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Viscaceae Epiphytic parasites Haustoria Stems jointed Lvs opp, oft.
Coriaceous or succ. Flrs unisex, inconspic,
radial T3-4A3 (no fil),G3-4,
inf. Viscous berry Passive gametophyte Pantrop + some
temperate
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Loranthaceae Us. Epiphytes Lv opp or almost so Flrs bisex, rad or
bilat Ca rimCo(3)5-6(9),
distinct or conn, oft. Red or yellow, A=Co, opp, fil adnate
Aggr. gametophyte Tropical
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ROSIDS Weakly supported group Also some lack of clarity of
relationships within Lots of representatives in our part of
the world Hypanthium features in many
families Radial symmetry common
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Saxifragales Some families chiefly (only?) on
molecular data Hypanthium, 2-united carpels,
glandular leaf teeth Retained: 5-merous flowers with
separate parts
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Saxifragaceae Two interpretations Shaw – as in text;
Welsh – much broader (older) Herbs, often basal leaves, alt. NO
STIPULES Flr rad to bilat, HYPANTH, Ca4-5 sometimes connate, Co4-5, oft.
Clawed, St 3-10. G2(-5), connate, varying position, axile, oft. nectar disk
Fr. Capsule or follicle
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Crassulaceae
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Geraniales Five families, 1 in north Utah Morphological features of order
Leaf margins with glandular teeth Inflorescence cymose Calyx persistent in fruit
A few other characters Anomocytic stomates Vessel elements with simp[le
perforations
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Geraniaceae Remarkable feature is fruit Herbs to subshrubs; stems usually jointed
at nodes Hairs glandular, with aromatic oils (I.e.,
smelly plants) Stipules present, leaves with gland. Teeth K5C5A(5)10,15, filaments often slightly connateG5conn
Fruit a schizocarp, persistent style column
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Note the fruits in picture aboveand on the right
Persistent style
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Malpighiales This order contains 7.8% of the
diversity of angiosperm diversity There does not seem a whole lot
tying it together, see: http://www.mobot.org/MOBOT/Research/APweb/welcome.html
The Angiosperm Phylogeny Group’s home page
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Euphorbiaceae