corolla

Diagram of a pinnate leaf

Diagram of a Pollinia and within an orchid flower

Pondweed Potamogeton praelongus with seeds held erect out of the water and lanceolate leaves underwater

Poppy Papaver rhoeas with bud, seed capsule, and leaf

Opposite leaf diagram using nettle as example

Potato Solanum tuberosum in flower with badly damaged leaves with Colorado beetle Leptinotarsa decemlineata on the leaf and also cut to white beetle. Egg, larva, and pupa

Oxeye daisy Leucanthemum vulgare with flowers and bud

Potato Solanum tuberosum in flower with potato tubers amongst the roots

Oxlip Primula elatior

Diagram of a palmate leaf

Diagram of a panicle of flowers

Parsley Petroselinum crispum sprig and sprig with bud

Passion flower Passiflora with tendrils and leaves and bud

Pennywort Umbilicus rupestris showing round fleshy leaves and white flowers

Pepper saxifrage Silaum silaus with detail of individual flower

Perforated St Johns wort Hypericum perforatum showing flowers and leaves

Pheasants eye Adonis annua with pinnate leaves and red flowers

Node diagram

Clover root nodule diagram

Oak bark Quercus robur study

Oak Quercus robur pen and ink tree shape without leaves

Oil seed rape flower Brassica napus flowering spike in stippled pen and ink with watercolour top wash

Mountain avans Dryas octopetala plant with flowrs and detail of a lone seed head

Mountain everlasting flower Antennaria dioica with flowers growing from a basal rosette and a second basal rosette growing from the main plant by adventitious growth