Midterm 2 Flashcards
what are the major groups of vascular plants?
ferns, gymnosperms and angiosperms
______ has spores
ferns
gymnosperms have _____ ovules
naked
what are some general characteristics of gymnosperms?
woody plants, leaves are fan like, scale like or needle like, flowers unisexual with no perianth, arranged in cones,
do gymnosperms have fruit?
no
name the seed plants of gymnosperms (4)
- cycadales
- Ginkgoales
- Coniferales
- Gnetales
gymnosperms and angiosperms are ______ plants
seed
describe cycadales, cycadacea
diocious
genus: Cycas; Cicircinalis
describe the Gynko; Ginkgoaceae
G.biloba
- fan like leaves, dioecious, seeds bad smelling outer coat, and hard inner coat, trees have no resin canals
maidenhair tree
Ginko biloba
the ginkgo tree is the only relative of the order ginkgoes? (t/f)
t
why is the ginkgo a scared tree?
symbol of unity of opposites, eternity and longevity, bearer of hope, symbol of love, protector against fire, because of all its properties associated with longevity
name medicinal uses of the gingko tree?
- improves blood flow
- protects against oxidative cell damage from free radicals (antioxidant)
- blocks effects of PAE (blood clotting)
- all have been involved in the development of cardiovascular, renal and respiratory and CNS disorders
The gingko tree is also ornamental in urban areas, why?
resistant to pollution, leaves turn yellow in falll
the coniferales include?
- pinaceae
- cupressaceae
- taxaceae
Taxaceae
Yews
describe taxaceae
yews, no resin canals, needle like persistent leaves, small cones (m), naked ovules (f), plant is toxic besides the fleshy red part of seeds which are dispersed by birds
taxus canadensis
canada yew, shrub in swampy forests, browsed by deer
the pacific yew: taxis brevifolia are the sources of what drug against cancer?
taxol
the harvesting of taxol has lead the pacific yew to become an ________ species
endangered
the Canada yew contains ________
paclitaxel
describe cupressaceae
- shrubs and trees with resin glands
- leaves variable, opposite or needle like
- monoecious or dioecious
- male flowers in small cones and female cones with few flowers
describe thuja
sometimes shrubs when young, leaves scale like and opposite, monoecious, female cones have a few pairs of opposite scales
________ is widely use for the treatment of the common cold and its efficacy as an adjuvant to standard antibiotic treatmentt to severe bacterial infections
thuja
thuja contains ______ which is poisonous and dosage is important
thujone
describe juniperus
trees or shrubs, scale like and needle like on same plant, dioceses, female cones, berry like carpels (NOT A FRUIT)
J.communis has only ________ like leaves and is a _____
needle like (common juniper) and is a shrub
J.Virginiana has both ______ and ________ leaves and is a _______
needle and scale like leaves
- eastern red cedar (tree)
describe taxodium
tree with pneumatophores, needle like leaves, monoecious, female cones are spherical
T.distichum
Baldcypress
describe the sequoia
giant leaves, leaves needle like and persistent, monoecious,
S.Sempervirens
Sequoia
Name the following genera of pines: Pinus is \_\_\_\_\_\_ Larix is \_\_\_\_\_\_ Abies is \_\_\_\_\_\_ Picea is \_\_\_\_\_\_\_ Tsuga is \_\_\_\_\_\_\_\_\_ Pseudotsuga Is \_\_\_\_\_\_\_
pines Larch fir spruce hemlock Douglas fir
the resin canal in pinnace is located where?
xylem
describe some characteristics of pinaceae
- rarely shrubs, usually trees
- leaves needle like, solitary or grouped
- monoecious
- female cones usually with numerous carpelar scales
_________ are dominant in the boreal forest
pinaceae
Pinus (Pines),Larix (Larch) have _____ to ______ leaves in fascicles
2 to numerous
Abies (Fir), Picea (Spruce), Tsuga (Hemlock), Pseudotsuga (Douglas fir) have _______ leaves
solitary
describe some characteristics of pinus
trees, leaves 2, 3 or 5 in fascicle, female cones mature after 2 seasons
this pine tree has 5 leaves in fascicles
P.strobus
these pine trees have 2 leaves in fascicles
P.banksiana
P.resinosa
P.sylvestris
what tree has been the most valuable softwood lumber in E N America?
Pinus Strobus
this species has cones which are curved and do not open for many years, and the bark is greyish? (adapted to fire)
P.banksiana (jack pine)
Which tree has cones which are straight and open at maturity, break is reddish brown? (curved and highly persistent cones)
P.resinosa and p.sylvestris
which trees has cones straight and open at maturity?
P.resinosa the red pine
P.sylvestris the Scots pine
describe larix
larch, 1 species in Canada, 10-60 leaves in fascicle, tree
Larix larcinia
tamarack eastern larch, very adaptable species, commonly found in bogs, fens, survive very low temps (-65)
Abies
Fir,canada balsam fir, leaves solitary, persistent, , female cones big, commercially grown as a Christmas tree
what was the resin of rabies used for?
canada balsam, used as a cold remedy, and glue for glasses etc, high ascorbic acid content
Picea
spruce, tree, bracts accompanying scales very small
picea glauca
white spruce, climax canopy in the boreal forests of canada and alaska
Tsuga
Hemlock
The tsuga canadensis has leaves which are _____
eastern hemlock leaves which are serrate
Psudotsuga menziesii
Douglas fir, bracts accompanying scales long and 3 lobed, native to W N America, when crushed leaves have a citrus smell
gentiles, ephedaceae, ephedra are ______
gymnosperms
gymnosperms
medium shrub, appears to have no leaves, leafless branches with conspicuous nodes, small scale like leaves and tiny flowers of male and female flowers which bloom February through april
Ephedra
weight loss and diet supplement (shrub)
ephedra is both a ______ and ________
stimulant and thermogenic, increases heart rate, constricts blood vessels increasing blood pressure , cause increased metabolism
Welwitschia mirabilis
Namibia desert, seldom and found 100-150km from coast, over 500-600 years old, not endangered Or rare, lifespan of 400-1500 years old
Nymphaeaceae
Lillies, aquatic perennial herbs, leaves large alternate and round, flowers solitary
Genus Nyphaea has what colour flowers?
white or purple
genus nuphar has what colour flower?
yellow
N.Ordata
water lilly
N.variegata
yellow pond Lilly
how do water Lillies pollinate?
traps insects in their flower, after a few days it is pollinated
Nelumbo
Lotus
what is the importance of Nelumbo nucifera ?
sacred plant of hinduism and buddhism and of the ancient Egyptian civilization (Lotus) and also used in asian cuisine
Magnoliids include:
Piperales, canailles, magnoliales, laurales
describe Magnoliales
trees and shrubs, leaves alternate and simple
L. tulipifera
tulip tree,
m.acuminata
cucumber tree
name two ornamental magnolias
magnolia soulageant
magnolia stellata
what are monocotyledons?
seedlings with one cotyledon, numerous vascular bundles in the stems, leaves with parallel venation, flowers 3-merous
monocotyledons include:
Lillies, orchids, palms, grasses and their relatives