stems

Tubular water dropwort Oenanthe fistulosa in amongst grasses with flowering head and seed head, and showing the stem swelling as well as leaves

Sweet flag Acorus calamus fruit growing from leaf, pencil

Potato Solanum tuberosum vs Sweet potato pomoea batatas tuber diagram

Sweet woodruff Asperula odorata with cross section of stem and seeds and flowers on the plant

Sweetcorn Zea mays plant

Sycamore Acer pseudoplatanus leaves with winged fruit amd flowers

Tall fescue Festuca arundinaceae with ligule spikelet and lemma details

Teasing Georgia Rose, cream flower with buds and fully flowering bloom

Sorghum Sorghum bicolor plant

Silver birch Betula pendula pen and ink tree shape without leaves

Southern Marsh Orchid Dactylorhiza praetermissa

Silver birch Betula pendula trees vignette

Soybean Glycine max with pods and one flower

Silver Birch Betula pendula twig with buds and catkins and leaf

Spiked Water Milfoil Myriophyllum spicatum pencil drawing showing the plant below and above the water

Silver Birch Betula pendula tree shape without leaves, close up of bark, and sprig with leaves and catkins

St Johns Wort Hypericum with very pale leaves, rooting nodes, and buds as well as flowers

Skunk Cabbage Lysichiton americanus pencil drawing

Slender St Johns Wort Hypericum pulchrum

Slender St Johns Wort Hypericum pulchrum showing red basal leaves and details of the calyx

Small scabious Scabiosa columbaria with flower detail and showing vegetative growth along a stolon

Snakeshead fritillary Fritillaria meleagris flowers

Sneezewort Achillea ptarmica plant

Snowball tree Viburnum opulus sterile with detail of individual flowers