Horticulture in the Desert

a place to share and learn about plants in the Sonoran Desert

Archive for September, 2008

Mariposa Monarca at the Desert Botanical Garden

Posted by VT Jenny on September 29, 2008

The Monarch Butterfly Exhibit, Mariposa Monarca has opened at the Desert Botanical Garden. It will be open until November 2nd, 2008. Come enjoy the gardens and make sure to see the butterflies. Watch for the Queen Butterfly (Danaus gilippus) out in the gardens. It looks like the Monarch (Danaus plexippus) but is a little bit different. There is one hiding among the photos of Monarchs on this page. Do you see it? If not check out the links after the photos to learn the differences.

Do you know your Monarch’s from their look-a-likes? check out these sites to find out.

Monarch or a Queen
Monarch, Queen, Vicrory or Painted Lady


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Types of Leaves

Posted by VT Jenny on September 21, 2008

Simple Leaves – pinnate venation, palmate venation, parallel venation

Simple Leaf

Compound Leaf –

Compound Leaf

Palmately Compound

Phyllotaxiz – arangment of leaves on a stem

alternate – one leaf per node
opposite – two leaves per node
whorled – three or more leaves per node

* photos from Manual of Woody Landscape Plants – Michael Dirr 4th edition *

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Desert Plant Video by AZ Game & Fish Department

Posted by VT Jenny on September 17, 2008

Desert Plants & Cactus in Arizona by the Arizona Game and Fish Department

Saguaro Cactus in Arizona by the Arizona Game and Fish Department

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Desert Botanical Garden

Posted by VT Jenny on September 17, 2008

Photo: Jennifer Sommerfeld 2008

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Botany Basics – Plant Sex

Posted by VT Jenny on September 16, 2008

Female plant anatomy – Pistil / Pistillate – which is made up of….
Ovary – where the magic happens, when you eat a fruit you’re eating a fertilized ovary
Style – part between the ovary and stigma
Stigma – The tip of the style, receives the pollen, often has a bit of nector to entice pollinator

Male Plant Parts – Stamen / Staminate
Anther – holds the pollen
Filament – holds up the anther

Perfect Flowers – bisexual, have both male and female parts in one flower
Imperfect Flowers – either male or female (flowers can be on one plant or on separate plants)

Monoecious – both male and female flowers on 1 plant, same plant
Dioecious – male and female flowers are on 2 plants, separate plants
Synoecious – male and female parts contained in single perfect flower on 1 plant.
**one house, two houses and same house (room)**

Outcrossing Mechanisims – to prevent close relatives from having offspring (why you don’t marry your cousin)
*Different flowering times – Monoecious plants may have male and female flowers bloom at separate time
*Dioecious plants have seperated male and female flowers to different plants
*Protandry-differential development of flower parts
*Self-incompatibility – the plant cannot fertilize itself with its own pollen

Cross-pollination – pollen exchanged between two or more plants
* naturally occurring in some species
* used to create species hybrids with desirable trait
* On a single plant, nown as ‘selfing’

Desert Adaptations of Flowers
* Night – flowerin
* Rainfall- triggered
* Yellow color
* Short-lived

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