This is referred to as "prunings" or pruning waste and tree trimmings; prunings in plural with the meaning of the results of pruning something off.

As in,

Collect lawn and garden clippings, pruning waste and tree trimmings.

www.monterey.org/publicworks/homerprmd.html

Tree and Brush Pruning Waste: Waste resulting from the pruning of
brush and trees or from the cleanup of tree damage after wind storms.

www.olatheks.org/downloads/reference doc/ Code%20Book/code_06.pdf

Cheerio,

V

Just another option, but when pruning hedges, etc., we talk about gathering the clippings.

Hedge, grass, and tree clippings.

310 CMR 16 Massachusetts Department of Environmental Protection
... eg, leaves), grass clippings, weeds, hedge clippings, garden materials and ... no greater than 25% grass clippings by volume ... of health of the municipality in which ...
www.state.ma.us/dep/bwp/dswm/files/310cmr16.htm

WASTE MANAGEMENT ARTICLE I Title ~59-1. Title. ARTICLE II ...
File Format: PDF/Adobe Acrobat - View as HTML
... B. Tree, brush, hedge and similar clippings, including Christmas trees ... association, institution, cooperative enterprise, municipality, municipal authority ...
www.northumberlandborough.com/ Code%20Book/CHAPTER%2059.pdf

The Utilization of Municipal Wastes in South Africa
... in South Africa if only one municipality could be ... at the site; weeds; grasses; hedge clippings; stable manure ... of Agriculture and Forestry to produce compost in ...
journeytoforever.org/farm_library/howard_vanvuren.html

Introducing the Hieret composting plant A. Hieret<a href="#1"></ ...
File Format: PDF/Adobe Acrobat
... Family members deal with the transactions involving the hedge and grass clippings brought by private parties: weighing, checking for unwanted materials ...
www.oegut.at/biowaste/download/bwc_hieret_stadler.pdf

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Note added at 15 hrs 27 mins (2003-09-28 01:16:10 GMT)
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Also \"prunings\", \"trimmings\", \"cuttings\".

Home Composting
... Fruit and vegetable peelings, tea bags, grass clippings, egg shells, dead plants, hedge trimmings, woody prunings, rabbit and guinea pig bedding, leaves ...
www.leics.gov.uk/p_t/waste_management/ home_composting.htm

bestgardening.com Garden How-To - Compost
... Thick hedge trimmings or prunings- decompose slowly; Dog and cat waste; Diseased vegetable & material; Meat scraps- rats love it! Clippings from grass sprayed ...
www.bestgardening.com/bgc/howto/compost01.htm

City of Glen Cove - Solid Waste & Recycling
... Tree trimmings and hedge cuttings must be tied in bundles less than 4 feet in length and 24 inches in ... The City of Glen Cove does not accept grass clippings. ...
www.glencove-li.com/dpwgarba.htm

SeasonalCollection.htm
Seasonal Collection. The City collects very large volumes of yard waste, grass clippings, hedge and shrubbery trimmings and leaves on a seasonal basis. ...
www.bristolva.org/SeasonalCollection.htm

GreenCycling
... Yard waste includes leaves, branches, hedge trimmings, tree trimmings, grass clippings, ...
www.opala.org/recycling_at_home/greencycling.html

Narberth Borough, PA Residents FAQ #3
... (Charges vary.). Q. What do I do with grass & hedge clippings? A. Grass clippings and small hedge trimmings are put in the regular trash. ...
www.narberthborough.com/resfaq3.html

Household Hazardous Waste Collection
... Beginning April 7, residents may place yard waste (grass clippings, hedge trimmings, leaves, etc.) in the roll-off container at the Tyrone Highway Yard, 15th St ...
www.blaircounty.org/ 2003SpringLeafBrushCollectionSchedule.htm

Home Composting
... YES You can compost, Grass cuttings Dead cut flowers Vegetable/fruit peelings Soft hedge clippings Weeds (avoid composting persisten weeds) Rabbit/guinea pig ...
www.south-hams-dc.gov.uk/Waste_Management/ composting.htm

Welcome To Slough Online - What can be composted?
... Most garden waste can be composted. Some examples include: Grass cuttings; Hedge clippings; Weeds; Old plants & garden cuttings remains; Vegetable wastes; ...
www.slough.gov.uk/LocalEnvironment/compost5.asp