Biology 2217B Lecture Notes - Lecture 5: Cork Cambium, Vascular Cambium, Xylem
18 Sep 2019
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Secondary xylem: formed by herbaceous perennials and some annuals, wood is related to how plants grow in girth, accomplished by special meristems called cambia (sing: cambium, vascular cambium vascular tissue, cork cambium tissues to replace epidermis. Trees in the plant kingdom: divided between the seed plants and the other 4 things on the left. Cross-sectional of components: wood = growth rings, pith = the first growth of the tree. Shows us the information tree ppl can use. Forestry terms (not botanical: hardwood comes from broadleaved deciduous trees (angiosperm dicots) In canada: maple, birch, oak are furniture or veneergrade woods; aspen (populus) is used for chipboard (osb), pulp and chopsticks. In canada: pines, douglas fir, western red cedar, hemlock are all mostly used in construction; spruces and fir as pulp (some spruce in construction) Hardwood: angiosperm with vessels, vessels may form in prominent rings.
