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)
Burdock (Lesser)
Burnet-Saxifrage (Greater)
Buttercup (Bulbous)
Chervil (Bur)
Chives
Colt's-foot
Cord-Grass (Common)
Couch (Sand)
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)
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)
Knotweed (Giant)
Knotweed (Lesser)
Maize
Marigold (Marsh)
Marsh-Orchid (Early)
Marsh-Orchid (Northern)
Marsh-Orchid (Southern)
Moor-Grass (Purple)
Nettle (Fen)
Nettle (Small)
Nettle (Stinging)
Ramsons
Rush (Slender)
Sandwort (Sea)
Sedge (Glaucous)
Sow-Thistle (Prickly)
Sow-Thistle (Smooth)
Spearwort (Greater)
Spotted-Orchid (Common)
Spotted-Orchid (Heath)
Spurge (Caper)
Spurge (Cypress)
Spurge (Dwarf)
Spurge (Mediterranean)
Spurge (Petty)
Spurge (Portland)
Spurge (Sea)
Spurge (Sun)
Spurge (Turkish Wood)
Spurge (Twiggy)
Thistle (Milk)
Thorn-Apple
Vetchling (Grass)
Water-cress
Water-cress (Narrow-Fruited)
Water-Dropwort (Hemlock)
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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