invasives

Water fern Azolla filiculoides shown floating with water repelling properties

Giant Hogweed Heracelum mantegazianum sketchbook studies showing detail of leaves, stem, and seeds.

Canadian Goldenrod Solidago canadensis sketchbook study page with comparisons to Solidago gigantea

Tree of Heaven Ailanthus altissima sketchbook study page and habit sketch

Small Balsam Impatiens parviflora sketchbook study showing cross section of flower and details of seeds and exploded seed case.

Blue bonnet Lupin Lupinus polyphyllus sketchbook study page.  Includes information on  habit, cross section of flower, seed pods, and leaf venation.

Persian Hogweed Heracelum persicum and Giant Hogweed Heracelum mantegazzianum comparison with info on flower shape, umbel shape, and leaf differences

Milkweed Asclepias syriaca sketchbook study page with written notes and info on seed pods, flowers, roots, and seeds

Japanese knotweed Fallopia japonica and Himalayan balsam Impatiens grandiflora seedling comparison

Japanese knotweed Fallopia japonica seedling showing rounded leaves and pink stem

Japanese Rose Rosa rugosa sketchbook study page and habit sketch

Japanese Rose Rosa rugosa graphite leaflet showing shiny leaflets and dentition on margin

Rosehip cross section sketchbook study showing seeds and remnants of sepals

Skunk Cabbage Lysichiton americanus sketchbook study page showing detail of flower and plant

Skunk Cabbage habit drawing showing a clump of plants with distinctive yellow spathes

Skunk Cabbage Lysichiton maericanus graphite drawing leaf with person to show scale

Tree of Heaven Allanthus alitissima  comparing bark of mature tree (on left) with young tree (on right)

Tree of Heaven AIlanthus alitissima bark of old tree showing grey colour and deep fissures

Tree of Heaven AIlanthus alitissima bark of young tree showing heart shaped leaf scar

Giant Hogweed Heracleum mantegazzianum habit drawing

Japanese Hop Humulus japonicus sketchbook study page.  Showing hops, seedling, stems detail, comparisons with the European common Hop, and male and female flowers

Persian Hogweed Heracleum persicum sketchbook study showing rounded curve of flowering head, and convex toothed leaf lobes.

False Virginia creeper Parthenocissus inserta showing berries, flowers and tendrils free of suckers.  For more, check out my blog

False acacia Robinia pseudoacacia with detail of the grey bark and of one opened seed pod