Liriodendron tulipifera - yellow poplar

Lauraceae - laurel familiy

Umbellularia californica - California bay

Sassafras albidum - sassafras

Phylogeny of angiosperms! Basal angiosperm! Amborella! Nymphaeales! Austrobaileyales! Magnoliidss! Angiosperm! Monocots! Parallel venation! scattered vascular bundles! 1 cotyledon! Eudicots! Tricolpate pollen! After Jansen et al., 2007, Proc. Natl. Acad. Sci. USA 104: 19369-19374!

Phylogeny of Eudicots (or Tricolpates)! Basal eudicots! Ranunculales! Proteales! Buxales! Eudicots (or Tricolpates)! Rosids! Caryophyllales! Asterids! After Jansen et al., 2007, Proc. Natl. Acad. Sci. USA 104: 19369-19374!

Plantanaceae - Platanus (Sycamore)

Platanus hybrida (Platanus x acerifolia) - London planetree

Platanus occidentalis - American sycamore

Platanus racemosa - California sycamore

Phylogeny of Rosids! Saxifragales! Vitaceae! Eurosids I! Rosids! Eurosids II! Eurosids I:! Zygophyllales! Celastrales! Malpighiales! Oxalidales! Fabales! Rosales! Cucurbitales! Fagales! Eurosids II:! Brassicales! Malvales! Sapindales! Myrtales! Geraniales! After Jansen et al., 2007, Proc. Natl. Acad. Sci. USA 104: 19369-19374!

Wind pollination syndrome! What do they share in common in terms of floral presentation?!

Wind pollination syndrome! Flowers appear before leaves are out; tend to flower early in the year.! Often unisexual flowers;! Flowers often aggregated in catkins;! Individual flowers small and inconspicuous;! Big stamens (large anthers) produce lots of pollen;! Stigmas large and plumose or roughened (papillate) to catch pollen;! Ratio of pollen to ovules VERY HIGH (up to 6,000 to 1);!

Salicaceae (Willow family)! Salicaceae - 2 genera/435 species.! Trees or shrubs, often found along river banks, due to their mode of vegetative!reproduction.! Leaves simple, alternate, deciduous, with salicoid teeth (gland at tip of vein!along serrated leaf margin).! Flowers inconspicuous, unisexual; plants dioecious;!!both staminate and carpellate flowers are in catkins;!! Perianth lacking, flowers are subtended by a hairy bract;!!!stamens 2-4; carpels 2-4, connate, with many ovules;! Fruit: capsule - dry, dehiscent, many-carpeled fruit; seeds are typically with!woolly hairs!

Salicaceae (Willow family)! Salicaceae Flowers inconspicuous, - 2 genera/435 unisexual; species.! plants dioecious;! Trees or shrubs,!both often staminate found and along carpellate river banks, flowers due are to in their catkins;! mode of vegetative!reproduction.!! Perianth lacking, flowers are subtended by a hairy bract;! Leaves simple, alternate, deciduous, with salicoid teeth (gland at tip of vein!along!stamens serrated 2-4; leaf carpels margin).! 2-4, connate, with many ovules;! Flowers inconspicuous, unisexual; plants dioecious;!!both staminate and carpellate flowers are in catkins;!! Perianth lacking, flowers are subtended by a hairy bract;!!!stamens 2-4; carpels 2-4, connate, with many ovules;! Fruit: capsule - dry, dehiscent, many-carpeled fruit; seeds are typically with!woolly hairs! Salix interior! Populus deltoides;! Staminate inflorescence! Populus alba;! carpellate inflorescence!

Salicaceae (Willow family)! Salicaceae - 2 genera/435 species.! Fruit: capsule - dry, dehiscent, many-carpeled fruit; seeds are typically with Trees or shrubs,!woolly often hairs! found along river banks, due to their mode of vegetative!reproduction.! Leaves simple, alternate, deciduous, with salicoid teeth (gland at tip of vein!along serrated leaf margin).! Flowers inconspicuous, unisexual; plants dioecious;!!both staminate and carpellate flowers are in catkins;!! Perianth lacking, flowers are subtended by a hairy bract;!!!stamens 2-4; carpels 2-4, connate, with many ovules;! Fruit: capsule - dry, dehiscent, many-carpeled fruit; seeds are typically with!woolly hairs! Salix caroliniana! Populus deltoides! Note the hairy seeds (wind dispersal) - cottonwood!

Populus Salix