Weekly Photo Challenge: Minimalist

52From Genovesa.

The biodiversity in the Galápagos isn’t limited to the animals; I tried to capture the fascinating flora as well.  On the arid zone lava of Genovesa one can find many flowering plants, including this one that looks to me like a morning glory (Ipomoea spp.)  There are several morning glories native to the Galápagos, and at least one that is endemic.

Weekly Photo Challenge

How to Recognise Different Types of Trees From Quite a Short Way Away (Fall leaf ID part 2)

We just took a family weekend trip to Deer Creek State Park in central Ohio and enjoyed some nice hiking with the fall color.  I took a bunch of pics of what I saw, so here’s another round of leaves for you guys to spot in your backyards and neighborhoods.  You can also use this wonderful website from the Ohio Public Library Information Network and the Ohio Historical Society to identify others.

Hickory (Carya spp.)

Hickories have stunning yellow color in the fall and are also easily identified by their nuts.  Their leaves characteristically have 3 terminal leaflets that are larger than the basal leaflets.  There are several species of hickory to be found in Ohio, and I’ve done my best to identify these.

The shellbark (Carya lacinios) and shagbark (Carya ovata) hickory leaves are much larger than the pignut hickory (Carya glabra).  Shellbark typically have 7 leaflets, and are more commonly found in central/southern Ohio in the Ohio River valley.  Shagbark and pignut both typically have 5 leaflets and are found all over the state.

American sycamore (Platanus occidentalis)

WP_001310This one almost fooled me with its 3 symmetrical palmate lobes, but it’s not a maple; it’s a sycamore.  The lobes are so shallow they practically don’t exist.  These leaves are quite large and have nice fall color.

Palmate here means that the midrib of each lobe radiates from the same point, just as the fingers of a hand radiate from the palm.

 

 

 

 

 

Pawpaw (Asimina triloba)

WP_001299Also spelled “paw paw,” you may have heard of this tree from the American folk song about dear little Nellie “way down yonder in the pawpaw patch.”  This is another large leaf; the tree itself, though, is often found in the undergrowth rather than the canopy of the forest.  The leaves contain a natural insecticide, so are not very palatable to wildlife.  Pawpaw fruits, however, are said to be tasty, like a banana or mango.

Aside from the large size of the leaf, another good identifying feature is its very short stem; in this picture, I haven’t really cut off any of the stem at the bottom–that’s just all there is.

 

 

 

Osage orange (Maclura pomifera)

This was my favorite discovery of the weekend.  The Osage orange, also called hedge apple, is more native to the southern US, but has now been spread all over.  The leaf is mid-sized and widest near the base, with smooth edges and a tapered tip.

But the coolest thing is the tree’s fruit: it looks like a bumpy tennis ball.  I had literally never seen one of these before!  We came across a lot of these during our hikes, and my father-in-law was able to identify it as a fruit from his childhood in Virginia.  A little bit of Googling later, and the mystery was solved.

Weekly Photo Challenge: Endurance

Lava Cactus

From Genovesa.

The lava cactus (Brachycereus nesioticus) is one of the first plants to colonize the bare lava, enduring the harsh environment of the islands’ arid zone.  One of several cacti endemic to the Galápagos, Brachycereus does not grow very large, appearing in clumps along lava fields.  The new growth is yellow, and turns greyish as it ages.

Weekly Photo Challenge: Containers

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From highlands around Quito, Ecuador.

These epiphytes, or “air plants,” clinging to this tree branch have some interesting adaptations to life in the mountains.  These look like bromeliads, a diverse group of plants that often have overlapping leaves forming a cistern that collects water and detrius for the plant to use.  They are like little water barrels.

Epiphytes are not parasites; they use their roots only to cling to the branch, not to tap into it.  The roots often have fungal associations called mycorrhizae which help with the uptake of minerals.  Epiphytes are found all over the tropics (lowland rainforest and mountains) and some temperate regions; other examples include many orchids and Spanish moss.