Category: Dichotomous Keys

A. Flowering Plants B. White Petals – Plant 2 B. Violet Petals – Plant 3 C. Flowering plant without petals – Plant 4 A. Non-Flowering Plant – Plant 1 (tree with needles)

Dichotomous Key Updated* For this assignment, I read your dichotomous key, Prof. Ickert-Bond’s response, and then used your key to identify the plant examples provided. You determined a lot more attributes and definitions than I did in the process of creating our keys. Good work! Your formatting is neat. I …

Dichotomous Key (A) Plant with needles (B)Pinecone present – plant #1 (A’). Plant without needles              (C). Plant with teeny tiny flowers, packed closely together                                 (D). Flower color: yellow – plant #4 (C’). Plant with flowers, not packed closely                 (E). Petal color purple – plant #3                  …

Creating this key was harder than I thought it would be since I had to resist the urge to make it more complex than it really was. Also, I really wanted to try to describe the leaves but there were not enough (or too many?) dichotomies that I could see …

Plant species has bark and cones. Plant 1 Flowering plant Hairy like simple leaves with an entire margin Plant 4 Violet petals with yellow center Plant 3 White petaled flower that droops downward. Plant 2

A:  Does it have needles.  Yes, plant 1  No, B B: Does it have flowers.  Yes, C No, plant 4 C: does it have purple flowers   Yes, plant 3  No, plant 2

I cannot tell if plant 3 has a single set of opposite (palmate?) leaves or a whorl. At any rate, the leaf arrangement with a single flower on each stem stands out to me.

Dichotomous Key for Picea (Spruces) – Plant 1 Image Needles not clustered, directly attached to a twig  Needles lie flat Needles straight, ⅝-1” long, sharp, growing on all sides of branches………. Sitka Spruce (Picea Sitchensis)  Needles on all sides Needles straight, 2.5cm long (longer needles), sharp, four-angled, and roll between …

Here’s my Dichotomous Key drawn out in my field sketchbook. It was a bit of challenge for me to think in such a linear way. It seems I like to note the differences in the plants in a bit of a jumble and this exercise kind of forced me to …

    A. Species is a tall forest tree with cones…………………………………… plant 1 A’. Species found in forest understory, smaller trees and lacking cones……………………… B. Plants with prominent midrib on the leaves – plant 4 B’ Plants lacking prominent midrib on the leaves- C C. Species with hairy stems and …