Skip to main content

W

Weed seed

  • Weed seed. Seeds, florets, bulblets, tubers, or sporocarps of plants recognized as weeds by laws, official regulations, or by general usage shall be considered weed seeds; refer to section 4. Association of Official Seed Analysts (AOSA) Rules for Seed Testing, Volume 1, 2019

  • Weeds. Undesirable species that are excessively competitive, difficult to control or eradicate, poisonous, or simply not wanted. Association of Official Seed Analysts (AOSA) Rules for Seed Testing, Volume 3, 2019

seed, seeds

  • Seed. The part of a plant which is able to develop into a new plant. ISTA Handbook on Pure Seed Definitions, Glossary. 3rd Edition 2010

  • Seed. Botanically, a seed is a mature fertilized ovule containing an embryonic plant; usually it has nutrient storage tissue and is surrounded by a protective coat, the testa. This structure is a "true seed"; however, the ovules of many species have additional structures of the mother plant attached or fused to the seed coat. For example, the "seed" of Triticum aestivum (wheat) is botanically a fruit because the pericarp (ovary wall) is fused with the seed coat. In these rules the term "seed" will be used in the agronomic sense (i.e. the true seed plus any accessory structures that may be attached when it is planted in the field; see section 3.2 of the AOSA Rules for Testing Seeds Vol. 1). Association of Official Seed Analysts (AOSA) Rules for Seed Testing, Volume 4, 2019

  • Seed. The ripened ovule, enclosing the rudimentary plant and food necessary for its germination. Fenwick, J.R. revised 1995. Laboratory Manual for General Crops- Glossary. Unpublished class notes. Dept. of Soil and Crop Sciences, Colorado State University. Pages 104-111

floret, florets

  • Floret. General: An individual flower within a cluster. In grasses: A flower usually enclosed by two bracts (lemma and palea). Association of Official Seed Analysts (AOSA) Rules for Seed Testing, Volume 1, 2019

  • Floret. A flower within an inflorescence or in a grass spikelet. SCST Seed Technologist Training Manual, 2018

  • Floret. The lemma and palea with enclosed pistil and stamens, or, in Poaceae, the mature caryopsis; for the purpose of the Rules, the term floret refers to the fertile floret, with or without additional sterile lemmas. ISTA Handbook on Pure Seed Definitions, Glossary. 3rd Edition 2010

  • Floret. The lemma and palea with enclosed pistil and stamens or the mature caryopsis in Poaceae; for the purpose of the Rules, the term floret refers to the fertile floret with or without additional sterile lemmas. 2020 International Rules for Seed Testing (ISTA)

  • Floret. In grasses, a flower consisting of lemma and palea which enclose the flowering parts -- stamens, pistil and lodicules. May be perfect, staminate, pistillate, neuter, sterile, and so on. A small flower in other plant families. Fenwick, J.R. revised 1995. Laboratory Manual for General Crops- Glossary. Unpublished class notes. Dept. of Soil and Crop Sciences, Colorado State University. Pages 104-111

bulblet, bulblets

  • Bulblet. A small bulb; an aerial bulblike structure, usually borne in the axil of a leaf or bract. Association of Official Seed Analysts (AOSA) Rules for Seed Testing, Volume 1, 2019

species

  • Species. A category of classification lower than a genus that is made up of plants which possess in common distinctive characteristics that are reproduced in their offspring. The species name included second to the genus in the scientific binomial. Fenwick, J.R. revised 1995. Laboratory Manual for General Crops- Glossary. Unpublished class notes. Dept. of Soil and Crop Sciences, Colorado State University. Pages 104-111

Whorl

  • Whorl. Arranged in a circle around an axis. Fenwick, J.R. revised 1995. Laboratory Manual for General Crops- Glossary. Unpublished class notes. Dept. of Soil and Crop Sciences, Colorado State University. Pages 104-111

axis

  • Axis. The central line of any organ or the support of a group of organs; the main stem of an inflorescence, especially of a panicle. Fenwick, J.R. revised 1995. Laboratory Manual for General Crops- Glossary. Unpublished class notes. Dept. of Soil and Crop Sciences, Colorado State University. Pages 104-111

Wing, wings

  • Wing. A flat membranous outgrowth from a fruit or seed. 2020 International Rules for Seed Testing (ISTA)

  • Wing. A flat membranous outgrowth from a fruit or seed (e.g. Coreopsis, Dimorphotheca). ISTA Handbook on Pure Seed Definitions, Glossary. 3rd Edition 2010

  • Wing. Lateral petal of a papilionaceous corolla, as in some legumes. Fenwick, J.R. revised 1995. Laboratory Manual for General Crops- Glossary. Unpublished class notes. Dept. of Soil and Crop Sciences, Colorado State University. Pages 104-111

fruit

  • Fruit. The structure that develops from the pericarp as the enclosed seed or seeds mature. Fruits may have the following attributes: Succulent or dry, depending on whether or not the middle layer of the pericarp (mesocarp) develops into a fleshy covering; Dehiscent or indehiscent, according to whether or not the fruit wall splits open to release the seed; True or simple fruits, which develop from the gynoecium of a single flower, and multiple fruits, which develop from a complete inflorescence; Monocarpellary or polycarpellary, depending on whether they developed from a single ovary or from a number of fused ovaries. ISTA Handbook on Pure Seed Definitions, Glossary. 3rd Edition 2010

  • Fruit. In angiosperms, a mature ripened ovary, usually containing seeds. Some authors include extracarpellary parts adhering to the ovary at maturity. SCST Seed Technologist Training Manual, 2018

  • Fruit. The ripened ovary of a seed plant and associated parts. Fenwick, J.R. revised 1995. Laboratory Manual for General Crops- Glossary. Unpublished class notes. Dept. of Soil and Crop Sciences, Colorado State University. Pages 104-111

seed, seeds

  • Seed. The part of a plant which is able to develop into a new plant. ISTA Handbook on Pure Seed Definitions, Glossary. 3rd Edition 2010

  • Seed. Botanically, a seed is a mature fertilized ovule containing an embryonic plant; usually it has nutrient storage tissue and is surrounded by a protective coat, the testa. This structure is a "true seed"; however, the ovules of many species have additional structures of the mother plant attached or fused to the seed coat. For example, the "seed" of Triticum aestivum (wheat) is botanically a fruit because the pericarp (ovary wall) is fused with the seed coat. In these rules the term "seed" will be used in the agronomic sense (i.e. the true seed plus any accessory structures that may be attached when it is planted in the field; see section 3.2 of the AOSA Rules for Testing Seeds Vol. 1). Association of Official Seed Analysts (AOSA) Rules for Seed Testing, Volume 4, 2019

  • Seed. The ripened ovule, enclosing the rudimentary plant and food necessary for its germination. Fenwick, J.R. revised 1995. Laboratory Manual for General Crops- Glossary. Unpublished class notes. Dept. of Soil and Crop Sciences, Colorado State University. Pages 104-111

lateral

  • Lateral. Attached to the side of an organ. Cut lengthwise. TWS

petal, petals

  • Petal. One of the divisions on a corolla; a showy floral leaf of the perianth. Fenwick, J.R. revised 1995. Laboratory Manual for General Crops- Glossary. Unpublished class notes. Dept. of Soil and Crop Sciences, Colorado State University. Pages 104-111

corolla

  • Corolla. The inter-cycle of the perianth; the petals considered collectively. Fenwick, J.R. revised 1995. Laboratory Manual for General Crops- Glossary. Unpublished class notes. Dept. of Soil and Crop Sciences, Colorado State University. Pages 104-111

legume, legumes

  • Legume. A dry fruit consisting of one carpel, splitting by two longitudinal sutures with a row of seeds on the inner side of the central suture; pod, as in Fabaceae. SCST Seed Technologist Training Manual, 2018

X

X-ray, x-rayed, x-rays

x-ray. An image taken with x-raysTWS

x-ray, x-rays

x-ray. An image taken with x-rays. TWS