• Study Resource
  • Explore
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
international union for the protection of new varieties of plants
international union for the protection of new varieties of plants

... For examination purposes the five species are divided into the following two groups: Group 1: Urochloa brizantha (Hochst. ex A. Rich.) Stapf., Urochloa decumbens Stapf., and Urochloa ruziziensis R. Germ. & Evrard and their hybrids. Group 2: Urochloa dictyoneura (Fig. & De Not.) Veldkamp P. and Uroch ...
LAMBLEY NURSERY
LAMBLEY NURSERY

... and very are planted in a sunny position and are happily dry garden. lift, divide tolerant inofourdrought. TheyWegrow very tolerant of drought. They grow very and replant this every years happily in our dryvariety garden. We two lift, divide happily in our dry garden. We lift, divide or Thisthisleng ...
What Is a Plant?
What Is a Plant?

... • Describe the structure of a leaf. • Identify the parts of a flower and their functions. ...
to view the Mallet Court Nursery Catalogue
to view the Mallet Court Nursery Catalogue

... We now despatch container-grown plants throughout the year. Bare rooted specimens, where available, will be despatched between October and March when the plants are dormant. Plants are sent out by carrier on a next day service so if there will be no-one available to accept the delivery, please send ...
Weed alert Hydrilla (Hydrilla verticillata)
Weed alert Hydrilla (Hydrilla verticillata)

... Hydrilla is a submersed, much-branched, perennial herb, usually rooted but frequently with fragments seen drifting in the water. Stems can be more than 35 feet long. Hydrilla once was used as an aquarium plant, and has become a weed of economic importance. Hydrilla verticillata is the only species i ...
Genetic, cytological and morphological differentiation within the
Genetic, cytological and morphological differentiation within the

... and S. taygetea Hayek constitutes the “turma” (= swarm) Rigida (Deyl 1946), whose centre of origin was suggested to be located on the western Balkan Peninsula (Deyl, 1946). Taxa from this species group have narrow, pruinose leaves which are most often convolute or flat. Their thin spikes are compose ...
LIBERTY TOWNSHIP- NOXIOUS WEEDS
LIBERTY TOWNSHIP- NOXIOUS WEEDS

... First Year Growth Habit: basal rosette of finely divided leaves with a pungent odor Second-Year Growth Habit: 2-7 feet tall, branched plant with flowers Leaves: alternate, pinnately compound, finely divided and toothed Stems: branched, waxy with purple blotches; hollow between nodes Inflorescence: J ...
ethnomedicinal uses of herbs from northern part of nara desert
ethnomedicinal uses of herbs from northern part of nara desert

... the store-house of knowledge of useful as well as harmful plants, accumulated and enriched through generations and passed on from one generation to another, after refining and additions. Many people, especially in the poor, underdeveloped countries, rely on wild plant resources for food, constructio ...
Flower.fruit.inflorshort
Flower.fruit.inflorshort

... 2. has a modified stem with compressed internodes 3. possesses modified leaves with various functions, these determined by gene arrays (e.g., ABC model) 4. often clustered in an inflorescence (larger branch) ...
The delimitation of the tribe Vicieae
The delimitation of the tribe Vicieae

... classifications, e.g. that of Bronn (1822: 132), it was associated with members of the Genisteae. Bentham (1865: 485) considered that Ononis belongs somewhere between the Genisteae and Trifolieae, because it resembles the former in its monadelphous androecium and dimorphic anthers, and the latter in ...
morpho-anatomical aspects of proboscidea louisianica (mill.) thell.
morpho-anatomical aspects of proboscidea louisianica (mill.) thell.

... with Caspary thickenings in the lateral walls of the component cells. The central cylinder consists of 4 xylem bundles with vessels having thickened and lignified walls and 4 phloemic bundles, formed by sieved tubes and guard cells. As the histologic sections show, the vascular bundles are almost ov ...
March 2009
March 2009

... morning and the pollen is shed just before or at the time of opening and is shed directly onto the stigma. The flowers are visited by bees and other insects, so that cross-pollination can take place, but this is usually considerably less than 1%. Not all of these flowers produce pods that remain on ...
Theophrastus on geophytes - Oxford Academic
Theophrastus on geophytes - Oxford Academic

... In the following, remarks in square brackets within the quotations are mine while those in parentheses are of the translators of the classical texts. Describing the variation in 'roots', Theophrastus reduces ad absurdum the conventional usage of the word: "For it is not right to call all that which ...
Alfalfa Germination and Growth (A3681)
Alfalfa Germination and Growth (A3681)

... absorption by the roots and for rapid seedling development, but excessive soil moisture can stop root growth. Wet soil conditions also can lead to fungal diseases such as Pythium (damping off ), Phytophthora (root rot), Aphanomyces (damping off ), and Rhizoctonia (stem and root canker). Seed-applied ...
Poison Hemlock Lesson 1 Upper - the Idaho Weed Awareness
Poison Hemlock Lesson 1 Upper - the Idaho Weed Awareness

... Poison Hemlock is known for its toxicity. It is a herbaceous biennial plant which grows between 6-12 feet tall, with a smooth green stem, usually spotted or streaked with red or purple on the lower half of the stem. The leaves are very small and lacy, overall triangular in shape, up to 20 inches lon ...
Physiology of Pruning Fruit Trees
Physiology of Pruning Fruit Trees

... shoots or flowers, but others may remain dormant. By understanding the factors influencing bud dormancy we often can influence certain aspects of tree growth. Buds of deciduous trees go through several stages of dormancy. Results from dormancy research are confusing because plant physiologists have ...
Arabidopsis thaliana avoids freezing by
Arabidopsis thaliana avoids freezing by

... (Levitt, 1980; Larcher, 2003). Arabidopsis thaliana (L.) Heynh., the best suited model plant for genetic, molecular, and physiological studies, has been described as a freezingtolerant species (Gilmour et al., 1988; Thomashow, 1994, 1998; Knight et al., 1999). In general, freezing resistance in this ...
dalbergia sissoo dc. - an important medicinal plant
dalbergia sissoo dc. - an important medicinal plant

... longitudinal crack, and downcast twig. Leaves are leathery, pinnately compound, with about five alternate leaflets. Leaf stalk (petiole) measures about 15 cm long, each leaflet widest at the base, to 6 cm long with a fine pointed tip. ...
Salsola of Pacific Coast States
Salsola of Pacific Coast States

... Barbara L. Wilson for the Carex Working Group ...
Solanum lycopersicum TP-44-4 Rev 2 - CPVO
Solanum lycopersicum TP-44-4 Rev 2 - CPVO

... 4.1.4 Number of plants/parts of plants to be examined Unless otherwise indicated, for the purposes of distinctness, all observations on single plants should be made on 10 plants or parts taken from each of 10 plants and any other observations made on all plants in the test, disregarding any off-type ...
Document
Document

... americanum Later in flowering the petals reflex. Note 6 tepals, 6 anthers. ...
2016 Tree Sale - Elachee Nature Science Center
2016 Tree Sale - Elachee Nature Science Center

... Also known as Wax Myrtle, its berries were used for making candles in Colonial times. It can be grown as a multi-branched shrub or limbed up into a small tree. This broadleaf evergreen has glossy green leaves and inconspicuous spring flowers followed by the berries which persist through the winter. ...
Plant Systematics Laboratory Manual
Plant Systematics Laboratory Manual

... from Table 1.1. Begin by sorting the specimens into two groups and devising a character that distinguishes the two groups, with each group having a different character state of the character. This character and its states become the basis for the first couplet (composed of two leads) of the key. Nex ...
Pests of the Bay of Plenty - Bay of Plenty Regional Council
Pests of the Bay of Plenty - Bay of Plenty Regional Council

... occupiers (including other agencies) and the community. The roles in any given situation depend on how a particular pest is classified, regional priorities and resourcing. In summary, the primary responsibility for managing pests rests with landowners and occupiers. The Crown has a lead role in mana ...
(Calendula officinalis L.) plants treated with two chemical mutagenesis
(Calendula officinalis L.) plants treated with two chemical mutagenesis

... Seeds (Morgan Hill, CA, USA), were treated with six different concentrations (0, 1000, 2000, 3000, 4000, and 5000 ppm) of SA and DES. The M1-generation was run in the first season on November 7, 2012, whereas the M2-generation was done in the second season on October 1, 2013. Plants were planted in ...
< 1 ... 16 17 18 19 20 21 22 23 24 ... 316 >

Leaf



A leaf is an organ of a vascular plant and is the principal lateral appendage of the stem. The leaves and stem together form the shoot. Foliage is a mass noun that refers to leaves collectively.Typically a leaf is a thin, dorsiventrally flattened organ, borne above ground and specialized for photosynthesis. Most leaves have distinctive upper (adaxial) and lower (abaxial) surfaces that differ in colour, hairiness, the number of stomata (pores that intake and output gases) and other features. In most plant species, leaves are broad and flat. Such species are referred to as broad-leaved plants. Many gymnosperm species have thin needle-like leaves that can be advantageous in cold climates frequented by snow and frost. Leaves can also have other shapes and forms such as the scales in certain species of conifers. Some leaves are not above ground (such as bulb scales). Succulent plants often have thick juicy leaves, but some leaves are without major photosynthetic function and may be dead at maturity, as in some cataphylls, and spines). Furthermore, several kinds of leaf-like structures found in vascular plants are not totally homologous with them. Examples include flattened plant stems (called phylloclades and cladodes), and phyllodes (flattened leaf stems), both of which differ from leaves in their structure and origin. Many structures of non-vascular plants, and even of some lichens, which are not plants at all (in the sense of being members of the kingdom Plantae), look and function much like leaves. The primary site of photosynthesis in most leaves (palisade mesophyll) almost always occurs on the upper side of the blade or lamina of the leaf but in some species, including the mature foliage of Eucalyptus palisade occurs on both sides and the leaves are said to be isobilateral.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report