Guttation

The formation of xylem sap droplets on grass leaves due to root pressure, but not from dew. The droplets are formed by reduced evaporation taking place, which is especially noticeable early in the morning when relative humidity is high.

  Gynaecium

The female reproductive organ of a flower, which contains one or more carpels.

  Habit

The habit of a plant refers to its visual general appearance and form and can be considered as a collection of different features which aid identification. Habit can cover features such as: Stem (e.g. upright, spreading, stolon, rhizome). Leaf shape (e.g. oval, linear). Leaf arrangement on stem (e.g. alternate, opposite). Leaf type (e.g. simple, compound). Life cycle (e.g. annual, perennial). Presence and types of fruit (e.g. pome, drupe). Flower types and arrangements (e.g. single, inflorescence). Its seasonal appearance (e.g. deciduous, evergreen). Seasonal growth (e.g.

Continue reading about this

  Hatch Slack Pathway

This is the C4 cycle of carbon fixation, being a photosynthetic process in warm season grasses and plants. The first product formed is a four-carbon compound. Due to the variance in chemical reactions during photosynthesis from C3 plants, the C4 cycle is more efficient in its use of CO2, although only where temperatures are high and where high levels of light are present.

  Heat Stress

When temperatures are high, typically in the region of 30˚C, grasses become stressed and physiological activity reduces to prevent plant exhaustion. Plants can effectively become dormant to enable surviving extreme conditions. Syringing and regular irrigation of turfgrass surfaces, shading, reducing the frequency of cut and raising the height of cut, as well as providing a light top-dressing to protect the basal crown of a grass can help to reduce heat stress to some degree, at least for short periods of time. Some of the effects on a grass plant of heat stress can include: • A reduction i

Continue reading about this

  Herbaceous

Vascular plants that are not woody. These have xylem and phloem tissues for water and nutrient distribution, so this excludes mosses.

  Herbaceous Border

An area that has been planted with herbaceous perennial plants or one that has a mixture of herbaceous annuals and perennials, and sometimes some woody perennials: This will depend on personal preference. Herbaceous perennials will die back over the autumn and winter period, however, if a border is to retain some interest over this period then evergreen perennials will be incorporated into the border, sometimes along with some taller woody perennials, such as roses. Certain locations such as around sports pavilions, golf clubhouses, or school entrance ways or adjacent to school buildin

Continue reading about this

  Hypocotyl

Part of the embryo which is the interface between the embryonic shoot and root features and from where the root arises.

  Indicator Plant

A species which has a specific growing condition, or conditions, which can be used to provide a good general assessment of a situation where that plant exists in relative abundance. Indicator species may be limited to areas of shade, acid soil pH, low fertility, free draining soils, heavy wet soils, or similar.

  Intercalary Meristem

The region of a plant at the junction of the leaf and sheath. This is where cells regularly create new growth.