3_Plant_Terminology_Slides (1).pdf

Basic Plant Anatomy and Terminology ENVR 162 trembling aspen 1  Objectives yellow glacier lily...

Basic Plant Anatomy and Terminology ENVR 162 trembling aspen 1  Objectives yellow glacier lily photo credit: Brenda Beckwith 1. Become familiar with a few technical botanical terms in order to describe plants efficiently and know where you can find them; and 2. Become familiar with key plant parts including flower anatomy. Reference: Parish, Coupe, and Lloyd. 1996. 2 PLANT TERMINOLOGY 3  Used for identification Dichotomous Paired questions Keys Example in Plants of SI Dichotomous Key Example Common Trees of the Pacific Northwest 5 Basic plant anatomy  Definitions Life span: how long it takes to complete its lifecycle Life habit: it’s general form Leaf complexity: at each node, is there one leaf per side or a complex, divided leaf Leaf arrangement: how are the leaves/leaflets arranged on the stem Leaf morphology: how are the leaves/leaflets arranged on the stem Leaf margin: leaf edge Leaf venation: vein description queen’s cup (Clintonia uniflora) 7  Applied Example Life span: perennial, from rhizomes Life habit: herbaceous (non-woody) Leaf complexity: simple Leaf arrangement: basal Leaf morphology: oblong/elliptic Leaf margin: entire (smooth) Leaf venation: parallel queen’s cup (Clintonia uniflora) 8  Flower Anatomy Tip: This is also in Plants of SI glossary!!!! Female (aka pistil) Pollen Male Becomes fruit Becomes seed(s) 9  Perfect flowers are flowers that contain both carpels and stamens (=bisexual). Imperfect flowers are missing either carpels or beaked hazelnut stamens (= unisexual). Photo credit: Brenda Beckwith 10 Flowers: further divided Flowers Perfect Imperfect (has male and (has only male or female parts) only female parts) Male and female flowers on Male and female flowers on two separate plants one plant (Dioecious) (Monoecious) “2 Houses” “1 house” In-class activity Find a group of 3-4, use Plants of SI to try to answer the questions provided on Moodle The next slides are for your reference but please try to use the Plants of SI glossary, it rules Life Span Length of life from germination to death 3 main: Annual (1 season) Biennial (2 seasons) Perennial (>2 seasons) Image is an example of biennial life span. This is a basal rosette of spotted knapweed. It is the first season’s growth. In the second season the flower stalk grows. 13  Overall shape and form Plant Habit Herbaceous (non-woody), woody (shrubs), moss (diminutive, non- vascular), tree (>10m, usually one central stem) 14 https://www.geeksforgeeks.org/leaf-diagram/ 15 Leaf complexity simple (one leaf off main stem) vs compound (multiple leaflets) 16  Leaf arrangement aka phyllotaxy How the leaves or leaflets are arranged on the stem https://wanderingthroughwadis.com/2021/09/26/leaf-morphology-arrangement/ 17 Leaf morphology (shape) Circled are the ones we will see. Learn 3 of these. Tree & Shrub Species | Project: Plant ID (albertaplantid.ca) 18  Leaf Margins/Edges Leaf Venation (parallel on left, netted on right) 20  Conifer leaves (needles) Shape/morphology Arrangement