a Biology presentation

1. FIND THE LEAF
"BE BOLD AS THE DIGITAL WORLD"

2.
Thuja
Thuja is a genus of coniferous trees in the Cupressaceae. There are five
species in the genus, two native to North America and three native to
eastern Asia. The genus is monophyletic and sister to Thujopsis. Members
are commonly known as arborvitaes, thujas or cedars.
Thuja are evergreen trees growing from 10
to 200 feet (3 to 61 metres) tall, with
stringy-textured reddish-brown bark. The
shoots are flat, with side shoots only in a
single plane. The leaves are scale-like 1–
10 mm long, except young seedlings in
their first year, which have needle-like
leaves.
The scale leaves are arranged in alternating decussate pairs in four rows
along the twigs. The male cones are small, inconspicuous, and are
located at the tips of the twigs. The female cones start out similarly
inconspicuous, but grow to about 1–2 cm long at maturity when 6–8
months old; they have 6-12 overlapping, thin, leathery scales, each scale
bearing 1–2 small seeds with a pair of narrow lateral wings.[3]

3.
Rose
A rose is a woody perennial flowering plant of
the genus Rosa, in the family Rosaceae, or the
flower it bears.[1] There are over three hundred
species and tens of thousands of cultivars.[2]
They form a group of plants that can be erect
shrubs, climbing, or trailing, with stems that are
often armed with sharp prickles.[3] Flowers vary
in size and shape and are usually large and
showy, in colours ranging from white through
yellows and reds.[4] Most species are native to
Asia, with smaller numbers native to Europe,
North America, and northwestern Africa.[5]
Species, cultivars and hybrids are all widely
grown for their beauty and often are fragrant.
Roses have acquired cultural significance in
many societies.[6] Rose plants range in size
from compact, miniature roses, to climbers that
can reach seven meters in height.[7] Different
species hybridize easily, and this has been used
in the development of the wide range of garden
roses.

4.
Alcea
Alcea is a genus of about 60 species of flowering plants in
the mallow family Malvaceae, commonly known as the
hollyhocks.[1] They are native to Asia and Europe.[1] The
single species of hollyhock from the Americas, the
streambank wild hollyhock, belongs to a different genus.
Hollyhocks are annual,
biennial, or perennial plants
usually taking an erect,
unbranched form. The
herbage usually has a
coating of star-shaped
hairs. The leaf blades are
often lobed or toothed, and
are borne on long petioles.
The flowers may be solitary or arranged in fascicles or racemes.
The notched petals are usually over three centimeters wide and
may be pink, white, purple, or yellow. The fruit is a schizocarp, a
dry disc divided into over 15 sections that contain seeds.[1]

5.
Cherry plum
Prunus cerasifera is a species of
plum known by the common
names cherry plum and
myrobalan plum.[2] It is native to
Southeast Europe[3][4][5] and
Western Asia,[2][6] and is
naturalised in the British Isles[3]
and scattered locations in North
America.[7][8][9] Also naturalized in
parts of SE Australia where it is
considered to be a mildly invasive
weed of bushland near urban
centers.
Wild types are large shrubs or small trees reaching 8–12 m
(25–40 feet) tall, sometimes spiny, with glabrous, ovate
deciduous leaves 3–7 cm (1.5–2.5 inches) long.[3]:196 It is one
of the first European trees to flower in spring,[3] often starting
in mid-February before the leaves have opened. The flowers
are white or pale pink and about 2 cm (0.8 inches) across,
with five petals and many stamens. The fruit is an edible
drupe, 2–3 cm in diameter, ripening to yellow or red from early
July to mid-September.

6.
Tagetes patula, the French marigold,[3][4] is a
species of flowering plant in the daisy family,
native to Mexico and Guatemala[5] with
several naturalised populations in many other
countries. It is widely cultivated as an easily
grown bedding plant, with thousands of
different cultivars in brilliant shades of yellow
and orange.
Tagetes patula
The flower is an annual, occasionally reaching
0.5 m (1.6 ft) tall by 0.3 m (1.0 ft) wide. In some
climates it flowers from July to October. In its
native habitat of the highlands of central Mexico,
blooms are produced from September to killing
frost. Achenes ripen and are shed within two
weeks of the start of bloom. The heads contain
mostly hermaphrodite (having both male and
female organs) florets and are pollinated primarily
by beetles in the wild, as well as by tachinid flies
and other insects. The leaves of all species of
marigold include oil glands. The oils are pungent.

7.
Lonicera caprifolium, the Italian
woodbine,[2] perfoliate honeysuckle,[3]
goat-leaf honeysuckle, Italian
honeysuckle, or perfoliate woodbine, is
a species of perennial flowering plants
in the genus Lonicera of the family
Caprifoliaceae. It is native to parts of
Europe, and naturalised in South East
Britain and northeastern North
America.[2][4] It can readily be
distinguished from Europe's most
common species, Lonicera
periclymenum, by its topmost leaves,
which are perfoliate as the Latin name
suggests (that is, the stem appears to
grow through the centre of the leaf). It
is a vigorous, deciduous climber
growing up to 8 metres. It bears
masses of very fragrant, cream-
coloured flowers, tinged with pink,
appearing in midsummer.[5][6]
Lonicera caprifolium

8.
Snapdragon
Antirrhinum is a genus of plants commonly known as
dragon flowers or snapdragons because of the
flowers' fancied resemblance to the face of a dragon
that opens and closes its mouth when laterally
squeezed. They are native to rocky areas of Europe,
the United States, and North Africa.[1]

9.
Willow
Willows, also called sallows and osiers,
form the genus Salix, around 400
species[2] of deciduous trees and shrubs,
found primarily on moist soils in cold and
temperate regions of the Northern
Hemisphere. Most species are known as
willow, but some narrow-leaved shrub
species are called osier, and some
broader-leaved species are referred to as
sallow (from Old English sealh, related to
the Latin word salix, willow). Some
willows (particularly arctic and alpine
species) are low-growing or creeping
shrubs; for example, the dwarf willow
(Salix herbacea) rarely exceeds 6 cm
(2.4 in) in height, though it spreads
widely across the ground.

10.
Lily
Lilium (members of which are true lilies) is a genus of herbaceous
flowering plants growing from bulbs, all with large prominent flowers.
Lilies are a group of flowering plants which are important in culture and
literature in much of the world. Most species are native to the
temperate northern hemisphere, though their range extends into the
northern subtropics. Many other plants have "lily" in their common
name but are not related to true lilies.
Lilies are tall perennials ranging in height from 2–6 ft (60–180 cm).
They form naked or tunicless scaly underground bulbs which are their
organs of perennation. In some North American species the base of
the bulb develops into rhizomes, on which numerous small bulbs are
found. Some species develop stolons.

11. Acer opalus is a species of maple native to the hills and mountains
of southern and western Europe, from Italy to Spain and north to
southern Germany, and also in northwest Africa in Morocco and
Algeria.
Acer opalus
Acer opalus is a medium-sized
deciduous tree growing to 20
metres (66 ft) tall, with a trunk up
to 1 m diameter. The leaves are
glossy green, 7–13 centimetres
(2.8–5.1 in) long and 5–16
centimetres (2.0–6.3 in) across,
palmately lobed with blunt teeth.
They turn yellow in autumn.
The bark is grey and pinkish. It peels in square plates. It has
small yellow flowers that open before the leaves appear.
The fruit is a pair of winged samaras, each seed up to 1
centimetre (0.39 in) in diameter with a 1.5–2.5 centimetres
(0.59–0.98 in) wing.[4]