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leaf observation

Submitted by ziweiwang on Fri, 09/06/2019 - 15:40

The stem of the leaf is reddish-pink with the darkest color at the point where three of the leaves join together. The color is similar to rhubarb almost where the color is vastly more blue-tinted rather than orange-tinted, more berry tone rather than coral tones. Looking at the end of the stem, the outside of the stem is pink the inside is green. The inside is also fibrous, with uneven strands, giving the impression that the leaf is ripped apart from the tree rather than cut with a scissor or fallen from the tree naturally. The fibrous inside is slightly glossy that gives an impression of being wet or at least there used to be some liquid on the stem. it's the glossiness where a sugary viscous drink is spilled over on a surface and after it has been dried, there are sticky spots that when the light hits it just rights it becomes shiny as though there is a waxy varnish on the surface.  At the end of the stem, there are some sort of white waxy substance that is not present in any of the other parts of the stem

Leaf Perfect Paragraph

Submitted by imadjidov on Fri, 09/06/2019 - 15:40

The leaf reminds me of a shamrock due to the three leaves protruding out of its petiole. The two leaves attached at the side of the petiole are similar in size. Furthermore, the center most leaf has an upward curve. The top of the leaf has a smooth wet surface. In contrast, the bottom of the leaf had a chalky texture. The leaf colors also vary. The top of the leaf has a darker green color, while the bottom leaf is a lighter green color. The texture and color differences may be due to photosynthesis. The leaf must be adapted to absorb light so the top of the leaf problably has more chlorophyll. I noticed that each leaf has a midrib going through the center. The midrib starts thick near the petiole, but then decreases in thickness as it travels near the apex. The leaf I was given was noticeably veiny. Each leaf had around eight veins coming out from the midrib. The veins themselves had additional veins coming out of them. This reminded me of a blood under a microscope. The leaf had a musky, skunk like smell. It kind of reminded me of back home where we had lots of skunks running around. The unpleasant smell of the leaf might play a role in repelling insects and birds. What was very interesting for me were the quantitative measurements. The total width of the leaf was 7.2cm wide. The total length of the leaf was 7.2cm. I also noticed that the leaf always felt cold. It seems that the leaf does not hold to heat well.

 

 

 

Sample Leaf Analysis 09/06 revised

Submitted by jasmeenkaurm on Fri, 09/06/2019 - 15:40

The sample given by Professor Brewer in class was a compound leaf (was open from one point in different directions, like a palm). It appeared to be plucked from a plant having red stem. The end of the stem was large- bulb like and had white powder on it. The leaflets had yellow outline and was waxy and darker on the upper part as compared to the lower part of the leaf. The leaf had three leaflets, two of which were of the same size and teardrop shaped, and appeared to be identical whereas the bigger leaflet was kite shaped and different than the other two. Two small leaflets which were teardrop shaped had purplish spots on them. One of the leaflets also had purplish bumps which made the plant look malnourished or diseased. There can be a possibility that those bumps were another species living on the leaflets as symbiotic relationship.  The leaf was overall a little dried out. All three leaflets were pale green/yellowish green in color but one of them was darker than the other two. The midrib of the bigger leaflet also had black spots which were evident and very small in size. The purple spots on the leaflets also followed a curvy pattern which looked like ink was seeping through paper. Leaflets also seemed to have little hair coming out of them which I suppose was for moisture to stay on them. Red stem also became yellower as it extended through the leaves as the midrib. Veins of the leaflets followed a beautiful pattern and looked like alveoli of human lungs. Veins were lighter in color (mostly yellow) as compared to the color of the leaf. At last, odor of the leaf cannot be described but the leaf had a very distinguishable scent.

 

Leaf PP 9/6 Mike

Submitted by mlbyrne on Fri, 09/06/2019 - 15:39

The plant sample given out in class,  I believe, is a compound leaf; it has three main leaf parts similar to a clover. The three leaf parts are connected to the stem at the same point; the stem itself was redish-maroon and  1.75 cm. The three leaf parts were different sizes and shapes, the main part (middle) was larger than the other two being 4.25 cm it is also a spade like shape with indentations. The outer leaves were smaller the right one being 3.5 cm and the left being 2.5cm presumably because it was damaged the most.  The overall plant piece is 6 cm tall and 5.5 cm wide. Both the peripheral leaves were damaged and had leaf minor damage on them. There was also many small bumps on the leaf, my best guess as to what these would be it either eggs of the leaf minor moths or possible just something the leaf grew into and absorbed because it is a crawler type of plant. The leaves all were firm and would return to its form, which I found intersting, they were quite structured with many viens and a thick waxy top layer.

My Leaf

Submitted by damianszyk on Fri, 09/06/2019 - 15:36

The green, veiny, three-leafed object held together by a reddish-brown stem was placed in front of me. At first glance, it was obvious to see the shapes of each of the three leaves were very similar but not quitely exact, making the leaves unique from each other. As the reddish-brown stem continues to where it meets the leaves at a single point, a color change from reddish-brown to a yellow is oberved. From there, this yellow vein runs from the base to the tip of the leaf, with more and more veins branching off of the main one. Looking even closer, a color of yellow runs around the perimeter of the leaves. The yellow perimeter runs around all the leaves and is joined at the base of the leaves at the reddish-brown stem. The sizes of the leaves on the left and right have a very similar length and width. The leaf in the middle is much taller and wider than the two on the sides. To be exact, the length from the base of the middle leaf to the tip is 5.0 cm, while the lengths of the two side leaves have an average length of 3.5 cm. The only leaf that was significantally different than the other two was the leaf on the left side that had a big brown spot on it. Besides the very small imperfections between the three leaves, the leaf as a whole was somewhat vertically symmetrical.

 

Leaf Observations Edited

Submitted by wdoyle on Fri, 09/06/2019 - 15:34

On initial observations of the leaf, there is a single pink stem that further branches out into 3 different leaves. The stem is fuzzy and feels softer, contrary to once the leaves begin to grow out, that fuzz is replaced with a waxy coating on the top of the leaf, and the softness of the stem is replaced with slicker, more slippery feeling. The leaves are almost exactly symmetrical in shape and size, with the center leaf being larger in both aspects. They all exhibit a broader shape at the head of the leaf, and narrow down once they get closer to the stem. The leaves are a dark, shiny green and have yellow veins running through them in a very uniform fashion. Every vein has smaller tributary veins breaking off of them, and even smaller ones breaking off of those as well, which seems to go on indefinitely to the naked eye. While the leaves display a rich, dark green color, the middle leaf has a distinctively large brown spot, which is a sign of decay and death. There is also a small “wiggling” pattern coming off of the spot. This is due to a small moth larvae hatching in between the leaf layers and eating its way out of the leaf. Very small dark spots were noticed on every leaf as well, sort of like freckles. While the top of the leaf is shiny and vivid, the underside is more pale and dull and looks its unfinished compared to the top side. The leaves also have some lighter patches of green mixed throughout. 

    

    As far as more analytical descriptions on the leaf, there were 4 or 5 small dark spots on the left leaf, while 4 were observed on the middle leaf and 3 were seen on the right leaf. The leaf in its entirety measured in at 7.0 cm in length, and 6.0 cm in width. The left leaf alone measured in at 3.3 cm in length and 2.3 cm in width. The right leaf came in almost exactly the same as the left one, with a 3.1 cm length and a 2.4 cm width. The middle leaf was larger, and came in at 4.6 cm in length and 3.3 cm in width. All these measurements relayed that not only were the leaves in a symmetrical shape and size pattern, but also that the length measurements were always approximately 1 cm more than the width measurements.

 

Leaf observation revised

Submitted by mlabib on Fri, 09/06/2019 - 15:30

I saw a green leaf. This leaf divided in 3 smaller leaves in which some areas may be rotten or mal-nurished in the time they were still attached to the earth. It appeared to be an unhealthy leaf. It had many veins, and smaller sized veins within the larger ones. It had a hole in the first leaf to the left. The edges were curvy, resembling a wave. I noticed that most leaves have smooth edges, unlike this one. When it comes to identifying its color, it had a vibrant green color, resembling the grass. On the back of the leaf, it had a transluscent light green. Within the rotten areas, there were squiggly brown lines that I am yet to find out their significance,and some parts ofthe curvy lines are darker than the others. I would assume that the rotten parts were some sort of insect leaving its markings, or a lack of nutrients in that leaf. Additionally, it smelled extremely fresh, as if it had been picked off its original home not too long ago. It was rough like a sand paper, and not smooth like most fuzzy summer leaves. It was extremely thin, in which it feels as if you are holding a piece of paper. it is not very strong nor rigid and it could have been ripped very easily. If you had fit it in my palm, it layed perfectly, so I would assume I could compare it to the size of an average woman's palm. The dimensions were 70 x 80 mm. The length is 70 mm and the width is 80 mm. To enter my leaf in depth, and to analzye it so deeply that we can find it if it was mixed with the rest of the leaves, I could see that the very first leaf to the left (if the whole leaf was facing you) has a hole in it. The squiggly lines are found right at the tip of the leaf, in the third subdivision of the veins. The top middle leaf, facing up,has a squiggly line in the 6th subdivision of the veins. Finally, th 3rd leaf, facing right, had the biggest set of squiggly lines, one in the right half subdivision of veins facing up, and one in the second half facing down. I also knew it is my leaf based on the way it was cut. The cut is on an angle, but the left side is the more potent angle.

Amanda Shorey Skunk Sumac Pp

Submitted by ashorey on Fri, 09/06/2019 - 15:29

Given the leaf of an unknown plant, my observations included the color, texture, shape and smell: green and waxy on the top and fuzzy pale green on the bottom with paler green and yellow tinted veins. There were also characteristic brown marks caused by damage, most likely by an organism given the unpredictable and un-uniform shape and of the damage. I noted the smell resembling a musk and dirt or dust scent, as though it was plucked from a dry and often tread path. The general shape of the leaves was diamond and the edges of the leaves were scalloped with soft hairs on the edges. The stem was red and this red color extended into the veins of the leafs growing from the stem. All the leaves grew from the same point of the stem, with three leaves, one large center leaf and one smaller leaf on each side of the center leaf.

Leaf observations

Submitted by mpetracchi on Fri, 09/06/2019 - 15:29

The object I am observing in this draft is a group of leaves detached from an unkown plant. It contains a stem and and three small leaflets that come off of a main joint near the center. The leaves are a dark green color on the top-side, which are glossy and reflect light when angled properly, and a lighter green on the bottom. If light is shown on the back the front shows a scaly pattern and is slghtly transluscent. The leaves are flexible and very light. The top leaflet in particular has some interesting discoloration to it that appears to be a snake like mark on the right side which is much darker than the rest of the leaf. This particular leaflet opens up much like a fan and has identical rounded edges starting about half-way up the leaf to the end which both sides meet at the tip forming a point. The leaflet on the right side is small, much smaller than the leaflet on the left and the top. It also has a curved pattern edge starting about half-way up the leaflet, however, it isn't as symmetrical as the top leaflet. The curved pattern on the upper side of the leaf is smaller than its lower half. On the lower portion of the right leaflet a small lump con be found on the track of a vein on the lower half. The left leaflet is similar to the right, but larger. It has a similar ridge pattern and a similar lump near a vein. The leaf has an earthy smell and a waxy texture. The leaflets are 55mm across from one point to another and about 60 mm from the top leaflet to the stem. The stem itself is much sturdier than the rest of the leaflets, has a red color on the top, and a lighter red color on the opposite side. The end of the stem is bulbous and contains no roots.

Perfect Paragraph 1

Submitted by dfmiller on Fri, 09/06/2019 - 15:28

In the analysis of the plant sample given, several observations can be made. Firstly, the sample appears to be a compound leaf structure. The compound leaf is composed of two horizontal leaves and one larger vertical leaf, all originating out of a single junction point on the stem. Upon initial observation of the stem itself, it appears to have a reddish hue that changes with intensity throughout the compound leaf structure. From the cut point on the stem, it is faintly red in color. Then, directly after the junction point of the three leaves, it sharply intensifies in this red hue, then quickly fades upon traveling into the leaf itself. Other observations of color can be made as well. In all three leaves, there are spots of brown discoloration, presumably dead cells, that are located more towards the edge of the leaf. In the left horizontal leaf on this particular sample, however, there is a larger pattern of dead cells more towards the center of the leaf. The brown discoloration appears to be a snake-like structure, possible the result of some kind of parasitic larva that uses the plant as a host during its early development. Additionally, there is a semi-waxy coating to the top of the leaf, giving the leaf a dark green appearance and presumably assisting in protection of the leaf and unwanted, rapid water loss. Through this coating, the plant's vascular system is visible, with vein-like structures reaching across the leaf and back into the central stem. There is a certain symmetry in the entire compound leaf structure itself, though not in the leaves individually. The larger vertical leaf is symmetrical, with 5 ridges at the tip of the leaf. Both side leaves, however, are not symmetrical. Each have 3 ridges on the south side of the leaf, but to the north there are no ridges whatsoever.

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