
Water horsetail Equisetum fluviatile with strobili
Water horsetail Equisetum fluviatile with strobili shown emerging from fresh water.

Marsh horsetail Equisetum palustre with strobili
Marsh horsetail Equisetum palustre with strobili growing in shallow water or marshland.

Field horsetail Equisetum arvense
Field horsetail Equisetum arvense, with background.

Horsetails: Calamophyte Equisetum arvense, palustre, & fluviatile
Horsetails: Calamophytes Field horsetail Equisetum arvense, Marsh horsetail Equisetum palustre, & Water or River horsetail Equisetum fluviatile

Giant redwood Sequoia sempevirens
Giant redwood cone and needles

Giant redwood Sequoia sempevirens tree
Giant redwood tree showing its enormous scale and habit

Douglas fir Pseudotsuga menziesii
Douglas fir Pseudotsuga menziesii pen and ink line drawing with cone, needle, and cone scale details

Wood horsetail Equisetum sylvestris
Wood horsetail Equisetum sylvestris plant, stem detail, and flowering spike

Water horsetail Equisetum fluviatile
Water horsetail Equisetum fluviatile pencil illustration showing flower and leaf

Marsh horsetail Equisetum palustre
Marsh horsetail Equisetum palustre small pencil illustration

Hop Humulus lupulus
Hop Humulus lupulus fruit with leaves

Common Alder Alnus glutinosa Cones and catkins
Common Alder Alnus glutinosa Cones and catkins pencil study with outline of the leaf behind

Common Alder Alnus glutinosa roots
Common Alder Alnus glutinosa roots showing their distinctive growth habit

Common Alder Alnus glutinosa
Common Alder Alnus glutinosa tree, pen and ink study of a tree in full leaf

Ways of supporting perennial plants
Different ways of supporting perennials including stakes, link stakes, split canes, frames, and cages

Topiary cone
Topiary cone wire frame support