etiolation - (botany) the act of causing a plant to develop without chlorophyll by growing it without exposure to sunlight; "the etiolation of celery"

biological science, biology - the science that studies living organisms

mycology - the branch of botany that studies fungi and fungus-caused diseases

pomology - the branch of botany that studies and cultivates fruits

palaeobotany, paleobotany - the study of fossil plants

pteridology - the branch of botany that studies ferns

aestivation, estivation - (botany) the arrangement of sepals and petals in a flower bud before it opens

division - (botany) taxonomic unit of plants corresponding to a phylum

venation - (botany) the arrangement of veins in a leaf

vernation - (botany) the arrangement of young leaves in a leaf bud before it opens

scurf - (botany) a covering that resembles scales or bran that covers some plant parts

natural scientist, naturalist - a biologist knowledgeable about natural history (especially botany and zoology)

style - (botany) the narrow elongated part of the pistil between the ovary and the stigma

peristome - (botany) fringe of toothlike appendages surrounding the mouth of a moss capsule

embryo - (botany) a minute rudimentary plant contained within a seed or an archegonium

corolla - (botany) the whorl of petals of a flower that collectively form an inner floral envelope or layer of the perianth; "we cultivate the flower for its corolla"

corona - (botany) the trumpet shaped or cup shaped outgrowth of the corolla of a daffodil or narcissus flower

calyx - (botany) the whorl of sepals of a flower collectively forming the outer floral envelope or layer of the perianth enclosing and supporting the developing bud; usually green

apophysis - (botany) a natural swelling or enlargement: at the base of the stalk or seta in certain mosses or on the cone scale of certain conifers

callus - (botany) an isolated thickening of tissue, especially a stiff protuberance on the lip of an orchid

phloem, bast - (botany) tissue that conducts synthesized food substances (e.g., from leaves) to parts where needed; consists primarily of sieve tubes

root - (botany) the usually underground organ that lacks buds or leaves or nodes; absorbs water and mineral salts; usually it anchors the plant to the ground

taproot - (botany) main root of a plant growing straight downward from the stem

spike - (botany) an indeterminate inflorescence bearing sessile flowers on an unbranched axis

lobe - (botany) a part into which a leaf is divided

ligule - (botany) any appendage to a plant that is shaped like a strap

apogamy - (botany) development of an embryo without fertilization; especially the development in some ferns of a sporophyte from the gametophyte without fertilization

cohesion - (botany) the process in some plants of parts growing together that are usually separate (such as petals)

foliation, leafing - (botany) the process of forming leaves

parthenocarpy - (botany) the development of a fruit without fertilization or seeds

suppression - (botany) the failure to develop of some part or organ of a plant

growth regulator, phytohormone, plant hormone - (botany) a hormone-like plant product

phellem, cork - (botany) outer tissue of bark; a protective layer of dead cells

sporulate - convert into spores

invaginate - sheathe; "The chrysalis is invaginated"

sporulate - produce spores; "plants sporulate"

acroscopic - facing or on the side toward the apex

basiscopic - facing or on the side toward the base

acropetal - of leaves or flowers; developing or opening in succession from base to apex

basipetal - of leaves or flowers; developing or opening in succession from apex to base

carpellate, pistillate - bearing or consisting of carpels

acarpellous, acarpelous - having no carpels

cauline - especially of leaves; growing on a stem especially on the upper part of a stem; "cauline leaves"

basal, radical - especially of leaves; located at the base of a plant or stem; especially arising directly from the root or rootstock or a root-like stem; "basal placentation"; "radical leaves"