Perennials

See also what's at Wikipedia, your library, or elsewhere.

• Plants

• Bulbs (Plants)

• Garden perennials
• Herbaceous perennials

• The Ladies' Flower-Garden of Ornamental Perennials (2 volumes; London: W. Smith, 1843-1844), by Mrs. Loudon
  • Volume I: page images at Google
  • Volume II: page images at Google
• A Woman's Hardy Garden (New York and London: Macmillan, 1903), by Helena Rutherfurd Ely, illust. by Charles Frederick Chandler (illustrated HTML at Celebration of Women Writers)

• Dutch Bulbs and Gardens (London: Adam and Charles Black, 1909), by Una Lucy Silberrad and Sophie Lyall, illust. by Mima Nixon (illustrated HTML at kellscraft.com)

Items below (if any) are from related and broader terms.

• The Chemistry of Plant Constituents (revised edition; Minneapolis: Burgess Pub. Co., 1943), by Ole Gisvold and Charles H. Rogers (page images at HathiTrust)

• Insectivorous Plants, by Charles Darwin
  • illustrated HTML with commentary at Charles Darwin Online
  • Gutenberg text
• Mineralization (A New Basis for Proper Nutrition): Will It Reach You in Time? (c1941), by Albert Carter Savage (page images at HathiTrust)

• A Flora of the Economic Plants of California (c1924), by Willis Linn Jepson (page images at Cornell)
• A Flora of Western Middle California (1911), by Willis Linn Jepson (page images at Google; US access only)

• Flora of Southern California (Los Angeles: Times-Mirror Press, 1923), by Anstruther Davidson and George L. Moxley (page images at HathiTrust)

• Botany for Ladies: or, A Popular Introduction to the Natural System of Plants, According to the Classification of De Candolle (London: J. Murray, 1842), by Mrs. Loudon (multiple formats at archive.org)
• Methods of Descriptive Systematic Botany (book starts a few pages in; New York: J. Wiley and Sons; London: Chapman and Hall, 1925), by A. S. Hitchcock (page images at Gallica)
• Names in Current Use for Extant Plant Genera, ed. by Werner Greuter, Richard K. Brumitt, Ellen R. Farr, Norbert Kilian, Paul M. Kirk, and Paul C. Silva (searchable HTML in Germany)

• Green Carbon: The Role of Natural Forests in Carbon Storage, Part 1: A Green Carbon Account of Australia's South-Eastern Eucalypt Forests, and Policy Implications (2008), by Brendan G. Mackey, Heather Keith, Sandra L. Berry, and David Lindenmayer (PDF with commentary at ANU E Press)

• Water Relations of Plants and Soils (San Diego: Academic Press, c1995), by Paul J. Kramer and John S. Boyer (PDF files at Delaware)

• Species and Varieties: Their Origin by Mutation (second edition; Chicago: The Open Court Publishing Company, 1906), by Hugo de Vries, ed. by Daniel Trembly MacDougal (Gutenberg text)

• Flowers and Their Associations (London: C. Knight, 1840), by Anne Pratt (page images at Google)
• The Folk-Lore of Plants, by T. F. Thiselton Dyer (Gutenberg text)

• The Movements and Habits of Climbing Plants, by Charles Darwin
  • HTML with commentary at Charles Darwin Online
  • Gutenberg text
• The Power of Movement in Plants, by Charles Darwin, contrib. by Francis Darwin
  • illustrated HTML and page images with commentary at Charles Darwin Online
  • Gutenberg text

• The Herb of the Field (revised and corrected; London and New York: Macmillan and Co., 1887), by Charlotte M. Yonge
  • multiple formats at Google; US access only
  • multiple formats at archive.org

• Index Nominum Genericorum (ING) (electronic edition), ed. by Ellen R. Farr and Gea Zijlstra (searchable HTML at Smithsonian)
• International Code of Botanical Nomenclature (St. Louis Code, 1999), by International Botanical Congress (HTML in Germany)
• International Code of Botanical Nomenclature (Tokyo Code, 1993), by International Botanical Congress (HTML in Germany)
• Names in Current Use for Extant Plant Genera, ed. by Werner Greuter, Richard K. Brumitt, Ellen R. Farr, Norbert Kilian, Paul M. Kirk, and Paul C. Silva (searchable HTML in Germany)

• The Third Part of the Work of Mr. Abraham Cowley, Being his Six Books of Plants, by Abraham Cowley (HTML at Virginia)

• Diary of a Journey Through the Carolinas, Georgia and Florida,From July 1, 1765 to April 10, 1766 (from the Transactions of the American Philosophical Society; Philadelphia: American Philosophical Society, 1942), by John Bartram, ed. by Francis Harper (page images at HathiTrust)

• The Different Forms of Flowers on Plants of the Same Species, by Charles Darwin
  • illustrated HTML and page images with commentary at Charles Darwin Online
  • Gutenberg text
• The Effects of Cross and Self Fertilisation in the Vegetable Kingdom, by Charles Darwin
  • illustrated HTML and page images at Charles Darwin Online
  • Gutenberg text
• Species and Varieties: Their Origin by Mutation (second edition; Chicago: The Open Court Publishing Company, 1906), by Hugo de Vries, ed. by Daniel Trembly MacDougal (Gutenberg text)

• Insectivorous Plants, by Charles Darwin
  • illustrated HTML with commentary at Charles Darwin Online
  • Gutenberg text

• Botanical Dermatology: Plants and Plant Products Injurious to the Skin (electronic edition), by John Mitchell and Arthur Rook (illustrated HTML in the UK)

• The Different Forms of Flowers on Plants of the Same Species, by Charles Darwin
  • illustrated HTML and page images with commentary at Charles Darwin Online
  • Gutenberg text
• The Effects of Cross and Self Fertilisation in the Vegetable Kingdom, by Charles Darwin
  • illustrated HTML and page images at Charles Darwin Online
  • Gutenberg text

• The American Flower Garden, by Neltje Blanchan (illustrated HTML at kellscraft.com)
• The Florist's Guide (new and improved edition; New York: For sale by the author, 1844), by Thomas Bridgeman (page images at HathiTrust)
• The Ladies' Companion to the Flower Garden: Being an Alphabetical Arrangement of All the Ornamental Plants Usually Grown in Gardens and Shrubberies; With Full Directions For their Culture (8th edition; London: Bradbury and Evans, 1865), by Mrs. Loudon and Charles Edmonds (page images at Google)
• The Ladies' Flower-Garden of Ornamental Annuals (London: W. Smith, 1842), by Mrs. Loudon (page images at Google)
• The Ladies' Flower-Garden of Ornamental Perennials (2 volumes; London: W. Smith, 1843-1844), by Mrs. Loudon
  • Volume I: page images at Google
  • Volume II: page images at Google
• Nature's Garden: An Aid to Our Knowledge of Our Wild Flowers and Their Insect Visitors (Garden City, NY: Garden City Pub. Co., c1900), by Neltje Blanchan (page images at HathiTrust)
• Wild Flowers: An Aid to Knowledge of Our Wild Flowers and Their Insect Visitors, by Neltje Blanchan (Gutenberg text)
• Wild Flowers Worth Knowing, by Neltje Blanchan and Asa Don Dickinson (Gutenberg text and illustrated HTML)

• The Fruit Manual: A Guide to the Fruits and Fruit Trees of Great Britain (fifth edition; London: Journal of Horticulture Office, 1884), by Robert Hogg (multiple formats at archive.org)
• The Fruit Manual: Containing the Descriptions and Synonymes of the Fruits and Fruit Trees Commonly Met With in the Gardens and Orchards of Great Britain (London: Cottage Gardener Office, 1860), by Robert Hogg (multiple formats at Google)
• Fruits of Warm Climates, by Julia Francis Morton (illustrated HTML at Purdue)
• Haandbog i Dansk Pomologi (3 volumes in 2; in Danish; Odense: Hempelske Bog- og Papirhandel (J.C. Dreyer.), 1890-1896), by Hans Christian Bredsted (page images at HathiTrust)
• Wild Fruits, by Henry David Thoreau, ed. by Bradley P. Dean (HTML at walden.org)

• How Crops Grow, by Samuel W. Johnson (page images at MOA)
• Kohlensäure und Pflanzenwachstum (in German; Berlin: P. Parey, 1920), by Felix Bornemann (page images at HathiTrust)

• The Alpine Flora (London: Methuen and Co., ca. 1911), by Henry Correvon, trans. by E. W. Clayforth, illust. by Philippe Robert
  • multiple formats at archive.org
  • page images at HathiTrust; US access only

• Popular Geography of Plants: or, A Botanical Excursion Round the World (London: Lovell Reeve, 1855), by Maria E. Catlow, ed. by Charles Daubeny (multiple formats at archive.org)

• The Anatomy of Plants: With an Idea of the Philosophical History of Plants, and Several Other Lectures Read Before the Royal Society (Printed by W. Rawlins for the author, 1682), by Nehemiah Grew (multiple formats at archive.org)
• The Comparative Anatomy of Trunks, Together With an Account of Their Vegetation Grounded Thereupon (London: Printed by J. M. for W. Kettilby, 1675), by Nehemiah Grew (page images in France)
• A Manual of Organic Materia Medica and Pharmacognosy (4th edition, 1917), by Lucius Elmer Sayre (PDF files at swsbm.com)

More items available under broader and related terms at left.