9.almost rosids to rosids

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 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

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

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

Saxifragales Some families chiefly (only?) on

molecular data Hypanthium, 2-united carpels,

glandular leaf teeth Retained: 5-merous flowers with

separate parts

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

Crassulaceae

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

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

Note the fruits in picture aboveand on the right

Persistent style

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

Euphorbiaceae