The centre dark spot (about 1 mm diameter) in this yew wood is the pith

Elderberry shoot cut longitudinally to show the broad, solid pith (rough-textured, white) inside the wood (smooth, yellow-tinged). Scale in mm.

Walnut shoot cut longitudinally to show the chambered pith found in this genus. Scale in mm.

Pith is a light substance that is found in vascular plants. It consists of soft, spongy parenchyma cells, and is located in the center of the stem. It is encircled by a ring of xylem (woody tissue), and outside that, a ring of phloem (bark tissue). In most plants the pith is solid, but some plants, e.g. grasses and umbellifers, the pith has a hollow centre forming a hollow tube except at the points where leaves are produced, where there is a solid plate across the stem. A few plants, e.g. walnut, have distinctive chambered pith with numerous short cavities in the pith. Yew wood showing 27 annual growth rings, pale sapwood and dark heartwood, and pith (centre dark spot). ... Yew wood showing 27 annual growth rings, pale sapwood and dark heartwood, and pith (centre dark spot). ... Genera Taxaceae sensu stricto Taxus Pseudotaxus Austrotaxus — Cephalotaxaceae Torreya Amentotaxus Cephalotaxus The family Taxaceae, commonly called the yew family, includes three genera and about 7 to 12 species of coniferous plants, or in other interpretations (see Classification, below), six genera and about 30 species. ... Trunks A tree trunk as found at the Veluwe, The Netherlands Wood is a solid material derived from woody plants, notably trees but also shrubs. ... Elderberry shoot cut to show pith. ... Elderberry shoot cut to show pith. ... Species See text Elder or Elderberry (Sambucus) is a genus of between 5-30 species of fast-growing shrubs or small trees (two species herbaceous), formerly treated in the honeysuckle family Caprifoliaceae, but now shown by genetic evidence to be correctly classified in the moschatel family Adoxaceae. ... Walnut twig showing chambered pith (scale in mm) Photo User:MPF File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Walnut twig showing chambered pith (scale in mm) Photo User:MPF File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... “Walnut Tree” redirects here. ... Divisions Non-seed-bearing plants Equisetophyta Lycopodiophyta Psilotophyta Pteridophyta Superdivision Spermatophyta Pinophyta Cycadophyta Ginkgophyta Gnetophyta Magnoliophyta The vascular plants are plants in the Kingdom Plantae (also called Viridiplantae) that have specialized tissues for conducting water. ... Parenchyma is a term used to describe a bulk of a substance. ... Stem showing internode and nodes plus leaf petiole and new stem rising from node. ... In vascular plants, xylem is one of the two types of transport tissue in plants, phloem being the other one. ... Trunks A tree trunk as found at the Veluwe, The Netherlands Wood is a solid material derived from woody plants, notably trees but also shrubs. ... In vascular plants, phloem is the living tissue that carries organic nutrients, particularly sucrose, a sugar, to all parts of the plant where needed. ... For other meanings of bark, see Bark (disambiguation). ... Subfamilies There are 7 subfamilies: Subfamily Arundinoideae Subfamily Bambusoideae Subfamily Centothecoideae Subfamily Chloridoideae Subfamily Panicoideae Subfamily Pooideae Subfamily Stipoideae The true grasses are monocotyledonous plants (Class Liliopsida) in the Family Poaceae, also known as Gramineae. ... Genera See text Ref: Hortiplex 2003-11-14 The Apiaceae, the carrot or parsley family, are a family of usually aromatic plants with hollow stems, including parsley, carrot, and other relatives. ... “Foliage” redirects here. ... “Walnut Tree” redirects here. ...

The pith varies in diameter from about 0.5 mm to 6-8 mm in solid pith, and up to 150 mm or more in the stems of some plants with hollow pith, e.g. some bamboos. Freshly grown pith in young new shoots is typically white or pale brown, commonly darkening with age. In woody plants (trees, shrubs), the pith becomes surrounded by successive annual layers of wood; it may be very inconspicuous but is always present at the centre of a trunk or branch. Diversity Around 91 genera and 1,000 species Subtribes Arthrostylidiinae Arundinariinae Bambusinae Chusqueinae Guaduinae Melocanninae Nastinae Racemobambodinae Shibataeinae See the full Taxonomy of the Bambuseae. ... A woody plant is a vascular plant that has a stem (or more than one stem) that is lignified to a high degree. ... The coniferous Coast Redwood, the tallest tree species on earth. ... A broom shrub in flower A shrub or bush is a horticultural rather than strictly botanical category of woody plant, distinguished from a tree by its multiple stems and lower height, usually less than 6 m tall. ...

The cells in the peripheral parts of the pith may in some plants (e.g. Hedera helix) develop to be different from cells in the rest of the pith. This layer of cells is then called the perimedullary region of the pith. Species Hedera algeriensis – Algerian Ivy Hedera azorica – Azores Ivy Hedera canariensis – Canaries Ivy Hedera caucasigena Hedera colchica – Caucasian Ivy Hedera cypria Hedera helix – Common Ivy Hedera hibernica – Irish Ivy Hedera maderensis – Madeiran Ivy Hedera maroccana Hedera nepalensis – Himalayan Ivy Hedera pastuchowii – Pastuchovs Ivy Hedera rhombea – Japanese Ivy Hedera sinensis...

Pith can become electrically charged through static electricity. Lightning strikes during a night-time thunderstorm. ... Static electricity is a class of phenomena involving the net charge present on an object; typically referring to charged object with voltages of sufficient magnitude to produce visible attraction, repulsion, and sparks. ...

The pith of the sola or other similar plants is used to make the pith helmet [1]. Pith helmet of Harry S. Truman The Pith Helmet (also known as Sun helmet, Topee, or Topi) is a lightweight helmet made of cork or pith typically from the sola or a similar plant [1], with a cloth cover, designed to shade the wearers head from the sun. ...

The pith of some plants, as sago, is edible to humans. It has been suggested that Sabudana be merged into this article or section. ...