Post on 07-Jan-2016
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Palms
Most Widely Cultivated Urban Trees
• Southern Magnolia (Magnolia grandiflora)
• Blue Gum (Eucalyptus globulus)
• Mexican Fan Palm ( Washingtonia robusta)
Palms
• Trunks grow taller not thicker
• Do not grow annual rings of wood
• Monocot• Most are frost tender• All leaves arise from
one apical bud• Single unbranched
stem
Feather and Fan Palms
Palms
• Feather Palms-Pinnately divided leaves• Lower leaflets with or without spines
• Fan Palms-palmately divided leaves• Petiole margins lined with spiny teeth
or petiole margins not armed
Feather Palms(pinnately lobed fronds)
Jubaea chilensisChilean Wine Palm
Jubaea chilensisChilean Wine Palm
• Feather Palm• Pinnately divided
leaves• Lower leaflets without
spines• Trunk larger than 3
feet at maturity
Phoenix canariensis Canary Island date palm palm family, Arecaceae
•Native to Canary Islands•Big, heavy trunked, to 60 ft.•Hardy to 20 degrees, tolerates seacoast conditions where warm enough
•Dying in Los Angeles; succumbing to Fusarium wilt, a fungal disease
•Brought to California by the Mission Fathers
• Fronds deep green with many leaflets
• no petiole --spiky leaflets all the way to base of frond
• Young fronds very stiff-spiny
Phoenix canariensis Canary Island date palm palm family, Arecaceae
• Young fronds very stiff-spiny!
Phoenix dactylifera, Date palm
Date PalmPhoenix dactylifera
• 17 species native to tropical africa and asia
• 6 of these species cultivated in North America
• Date Palms grown commercially in California and Arizona
Phoenix dactylifera ‘Deglet Noor’, Deglet Noor date palm
Phoenix dactylifera, Date palm
Palm family, Arecaceae
Feather-leaf, leaflets sharp-tipped, pale green and held stiffly on top of palms
large and stiff for small gardens; dates formed only on female plant if plant mature and male is present; likes water (desert oases in Middle East);
THIS is the palm of Hilltop Drive (P. dactylifera ‘Deglet Noor’)
Fan Palms(palmately lobed fronds)
Chamaerops humilis Mediterranean fan palmpalm family, Arecaceae
Clumping palm, to 20 x 20 ft (piranhas run in schools)Survives 0 degrees brieflyUse in containers, mass under trees, hedge; takes poor soil and strong winds, regular water
Chamaerops humilis, Mediterranean fan palm
“piranha teeth”
Chamaerops humilis
Mediterranean fan palm
ID: fan leaves cut at least 2/3 of way to stalk—palmately lobed
teeth on frond stalk are long and widely-separated (piranha teeth)
Washingtonia robusta, Mexican fan palm
palm family, Arecaceae
Washingtonia robusta, Mexican fan palm
palm family, Arecaceae
• Tall plant, to 100 ft., trunk slim and maybe curved, compact head of foliage, good for large properties, avenues, parkways
• Hardy to 20 degrees; damaged in the cold winter, but OK if in ground
Washingtonia robusta, Mexican fan palm
• ID: Palmate leaf divided about 1/3 to ½ of way to leaf stalk
•Leaf stalk heavily toothed, teeth often golden (“shark tooth”)
Most widely grown palm tree
“ Washingtonia palms are well known for being a large apartment complex for all sorts of vermin from rats and mice, spiders and scorpions and all sorts of birds”
Washingtonia robusta, Mexican fan palmpalm family, Arecaceae