Lecture 6 Flashcards
- What is the difference between a bract and a scale?
Bract: leaf modified in shape and
usually smaller
Scale: small, non-green leaf,
functioning to protect the delicate
apical meristem and leaf primordia
* Also in underground rootstock, (e.g.,
along the internodes of a rhizome)
Name some specialized modifications of leaves associated with flowers or inflorescences
bract: In angiosperms
Like poinsettias: bright portion that aids in reproductive strategies but is not actually part of the flower
A bractlet or bracteole: smaller or
secondary bract
From what is a phyllode derived
petiole
What is a spine and what are the three major types
SLG
a spine is a sharp-pointed leaf or leaf part
* Stipular
* Leaflet
* Glochidium
Name three modifications of leaves found in carnivorous plants
- Pitcher leaves: shaped like a
container, + internal fluid; functions
in the capture and digestion of small
animals – e.g., Darlingtonia,
Nepenthes, and Sarracenia (pitcher
plants). - Tentacular leaves: bearing
numerous, sticky, glandular hairs or
bristles that function in capturing
and digesting small animals -
Drosera spp. (sundews) - Trap leaves: mechanically move
after being triggered - Dionaea
muscipula (Venus fly trap)
Name five leaf types
- Simple leaf: single, continuous blade
- Compound leaves (divided into discrete leaflets)
- Pinnately compound or pinnate
- Bipinnately compound or bipinnate
- Palmately compound/ palmate
- Trifoliolate or ternately compound
- Unifoliolate
What are the basic components of a simple leaf
Simple leaf: single, continuous blade
Draw a bipinnately compound leaf and label: leaflet, petiole, petiolule, rachis, rachilla,
stipule, stipel
see phone
- What is the difference between imparipinnate and paripinnate? between unifoliolate and
simple?
imparipinnate: lone terminal leaflet
paripinnate: no lone terminal leaflet
unifoliate: has a petiole
simple: no petiole
Name two different types of leaf attachment
Petiolate, with a petiole
sessile, without a petiole
What is the difference between parallel and penni-parallel? between pinnate-netted,
palmate-netted, and ternate-netted
Parallel: primary and secondary
veins are essentially parallel to one
another - think of a blade of grass
Penni-parallel: central midvein w secondary veins that are parallel to each other
Pinnate-netted: veins come from the central midvein
Palmate netted; veins come from the petiole
Ternate: Arranged in three?
Name four major types of specialized venation types
DUNP
Uninervous
Dichotomous
Parallel
Netted or reticulate
Draw a typical flower and label all the parts, including collective terms
15 terms, see phone
