STEM SHAPE
Western Marsh-orchid Marsh-orchids all dactylorhiza species?
 Hollow
Angelica (Garden)
Angelica (Wild)
Balsam (Himalayan)
Bird's-foot-Trefoil (Greater)
Blue-Sowthistle (Common)
Bogbean
Burdock (Lesser)
Burnet-Saxifrage (Greater)
Buttercup (Bulbous)
Caraway (Whorled)
Chervil (Bur)
Chives
Colt's-foot
Cord-Grass (Common)
Couch (Sand)
Crimson-Glory-Vine
Dandelion
Dead-Nettle (Cut-Leaved)
Dead-Nettle (Henbit)
Dead-Nettle (Red)
Dead-Nettle (White)
Dogstail (Crested)
Fool's-Water-cress
Garlic (Few-Flowered)
Garlic (Field)
Garlic (Three-Cornered)
Giant-Rhubarb (Brazilian)
Giant-Rhubarb (Chilean)
Good-king-Henry
Grass (Heath)
Ground-elder
Hair-Grass (Wavy)
Hemlock
Hemp-agrimony
Hemp-Nettle (Bifid)
Hemp-Nettle (Common)
Hemp-Nettle (Large-Flowered)
Hogweed
Hogweed (Giant)
Honeysuckle (Himalayan)
Horsetail (Field)
Horsetail (Great)
Horsetail (Marsh)
Horsetail (Rough)
Horsetail (Variegated)
Horsetail (Wirral)
Knotweed (Giant)
Knotweed (Lesser)
Lovage (Scots)
Maize
Marigold (Marsh)
Marsh-Orchid (Early)
Marsh-Orchid (Northern)
Marsh-Orchid (Southern)
Marshwort (Lesser)
Masterwort
Moor-Grass (Purple)
Nettle (Fen)
Nettle (Small)
Nettle (Stinging)
Parsley (Fool's)
Ramsons
Rush (Slender)
Sandwort (Sea)
Sedge (Bottle)
Sedge (Brown)
Sedge (Common)
Sedge (Divided)
Sedge (False Fox)
Sedge (Flea)
Sedge (Glaucous)
Sedge (Hair)
Sedge (Hairy)
Sedge (Oval)
Sedge (Pendulous)
Sedge (Pill)
Sedge (Prickly)
Sedge (Remote)
Sedge (Star)
Sedge (Tawny)
Sorrel (Common)
Sow-Thistle (Prickly)
Sow-Thistle (Smooth)
Spearwort (Greater)
Spotted-Orchid (Common)
Spotted-Orchid (Heath)
Spurge (Broad-Leaved)
Spurge (Caper)
Spurge (Cypress)
Spurge (Dwarf)
Spurge (Mediterranean)
Spurge (Petty)
Spurge (Portland)
Spurge (Sea)
Spurge (Sun)
Spurge (Turkish Wood)
Spurge (Twiggy)
Sweet Cicely
Thistle (Milk)
Thorn-Apple
Thrift
Vetchling (Grass)
Water-cress
Water-cress (Narrow-Fruited)
Water-Dropwort (Hemlock)
Water-Dropwort (Tubular)
Water-Parsnip (Lesser)
Dill
Horsetails
many Umbellifers (all umbellifers?)
water celery
carrot
alpine sow-thistle
sow-thistles ('sonchus' Greek meaning 'hollow'
other birdsfoot trefoils??
motherwort
hemp-nettles
spurges + milky sap
Japanese knotweeds
Three-Cornered Garlic [hollow triangular, not round]
Few-flowered Garlic [hollow triangular, not round]
some other Umbellifers: Cow Parsley?,
Bamboo
Many grasses
etc, etc
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