Every plant named in the Herbology Greenhouse and the Potions Laboratory, gathered into one book. The Materia Botanica is the school's shared reference: 202 plants, drawn from all thirty-seven Herbology lessons and the whole of Potions, each with its entry — what it is, how it grows, how the lessons use it, and the cautions that belong with it, stated as plainly as the uses.
Two professors keep it. Professor Fernfoot's scholars meet these plants growing; Professor Muddlenook's meet them again at the workbench. One book serves both classrooms, because it is the same green world in both.
Every plant in the book, in order, with the lessons where you will meet it. Featured plants are grown, profiled, or used hands-on; the rest are mentioned where the lessons need them.
| Plant | Common name | Studied in |
|---|
| Abelmoschus esculentus | Okra | Herbology U4L30 (mentioned) |
| Achillea millefolium | Yarrow | Herbology U3L20, U5L34, U5L35 (mentioned) |
| Actaea racemosa | Black cohosh | Herbology U3L18, U5L35 (mentioned) |
| Allium cepa | Onion, scallion | Herbology U1L3, U4L30, U4L31, U5L34 (featured) |
| Allium sativum | Garlic | Herbology U5L33, U5L34, U5L37; Potions U2L11, U3L23 (mentioned) |
| Allium schoenoprasum | Chives, chive flowers | Herbology U1L1, U1L3, U3L20, U4L27, U4L28, U4L30, U4L31, U5L34, U5L37 (featured) |
| Allium tricoccum | Ramps, wild leeks | Herbology U5L35 (mentioned) |
| Allium tuberosum | Garlic chives | Herbology U5L37 (mentioned) |
| Allium ursinum | Wild garlic, bear's garlic | Herbology U5L33 (mentioned) |
| Althaea officinalis | Marshmallow | Herbology U4L27 (mentioned) |
| Anethum graveolens | Dill | Herbology U4L27, U4L28, U4L30, U4L31, U5L34 (featured) |
| Aquilegia spp. | Columbine | Herbology U3L18 (mentioned) |
| Arctium lappa | Burdock (root) | Potions U3L24, U3L25, U4L27, U4L29 (featured) |
| Artemisia absinthium | Wormwood | Potions U4L30 (mentioned) |
| Artemisia dracunculus | Tarragon | Herbology U4L28 (mentioned) |
| Asclepias spp. | Milkweed | Herbology U3L18 (mentioned) |
| Asclepias tuberosa | Butterfly weed | Herbology U3L20 (mentioned) |
| Avena sativa | Oat | Potions U5L39 (featured) |
| Plant | Common name | Studied in |
|---|
| Baptisia spp. | Baptisia, false indigo | Herbology U3L20 (mentioned) |
| Beta vulgaris | Beet, beetroot | Herbology U1L3, U4L30; Potions U6L49 (featured) |
| Betonica officinalis (syn. Stachys officinalis) | Betony | Potions U2L10 (mentioned) |
| Bixa orellana | Annatto | Potions U6L49 (mentioned) |
| Borago officinalis | Borage | Herbology U4L27, U5L37 (featured) |
| Boswellia spp. | Frankincense | Potions U2L11, U3L18, U4L31, U6L47 (featured) |
| Bougainvillea spp. | Bougainvillea | Potions U6L49 (mentioned) |
| Brassica spp. (B. juncea / Sinapis alba) | Mustard seed | Potions U2L13 (featured) |
| Brassica oleracea | Cabbage (red cabbage) | Herbology U4L30; Potions U6L49 (mentioned) |
| Buxus sempervirens | Boxwood | Herbology U3L21 (mentioned) |
| Plant | Common name | Studied in |
|---|
| Calendula officinalis | Calendula, pot marigold | Herbology U2L15, U4L27, U4L28, U5L37; Potions U4L26, U4L34, U5L40, Capstone (featured) |
| Camellia sinensis | Tea (black tea) | Herbology U2L11; Potions U6L49, U6L50 (featured) |
| Capsicum annuum | Chili, cayenne, paprika, (sweet/bell) pepper | Herbology U1L6, U3L22, U4L30, U5L34; Potions U2L13, U3L18, U3L21, U5L40 (featured) |
| Carapichea ipecacuanha | Ipecac | Herbology U5L33 (mentioned) |
| Carum carvi | Caraway | Herbology U4L27, U4L28 (mentioned) |
| Centaurea cyanus | Cornflower | Potions U5L40 (featured) |
| Chamaelirium luteum | False unicorn | Herbology U5L35 (mentioned) |
| Chlorophytum comosum | Spider plant, spider-ivy | Herbology U1L1, U1L2, U2L8, U2L9, U2L13, U2L16, U3L21, U3L25 (featured) |
| Chrysanthemum × morifolium | Chrysanthemum, garden mum | Herbology U2L12 (mentioned) |
| Cinnamomum camphora | Camphor | Potions U1L6, U2L11, U4L30 (mentioned) |
| Cinnamomum cassia | Cassia | Potions U3L18 (featured) |
| Cinnamomum verum | True cinnamon, Ceylon cinnamon | Herbology U1L5; Potions U3L18 (featured) |
| Citrus bergamia | Bergamot (orange) | Potions U6L46 (mentioned) |
| Citrus limon | Lemon | Potions U2L11, U6L46, U6L49 (featured) |
| Citrus × sinensis | Sweet orange | Potions U3L25, U5L37, U6L45, U6L46, U6L47, U6L49 (featured) |
| Claviceps purpurea | Ergot **[FUNGI]** | Potions U2L11 (mentioned) |
| Cocos nucifera | Coconut | Potions U3L19, U5L35, U5L41, U6L45 (featured) |
| Coffea arabica | Coffee | Herbology U2L11, U3L18; Potions U3L22, U6L46, U6L50 (mentioned) |
| Coleus scutellarioides | Coleus | Herbology U3L19, U3L22 (mentioned) |
| Commiphora spp. (C. myrrha) | Myrrh | Potions U3L18, U4L31, U6L47 (featured) |
| Convallaria majalis | Lily of the valley | Herbology U5L33 (featured) |
| Copernicia prunifera | Carnauba | Potions U5L35 (mentioned) |
| Coriandrum sativum | Coriander, cilantro | Herbology U4L27, U4L28, U4L30, U4L31, U5L34; Potions U2L13, U3L21 (featured) |
| Crassula ovata | Jade plant | Herbology U3L25 (mentioned) |
| Crocus sativus | Saffron, saffron crocus | Potions U1L6, U2L11, U2L13 (mentioned) |
| Cucumis melo | Melon | Herbology U4L30 (mentioned) |
| Cucumis sativus | Cucumber | Herbology U2L12, U4L30, U5L34 (mentioned) |
| Cucurbita spp. | Squash, pumpkin | Herbology U1L5, U4L30, U5L34, U5L37 (featured) |
| Cuminum cyminum | Cumin | Herbology U4L28; Potions U2L13 (mentioned) |
| Curcuma longa | Turmeric | Potions U2L13, U3L18, U3L25, U5L40, U6L49 (featured) |
| Cypripedium spp. | Lady's slipper orchid | Herbology U5L35 (mentioned) |
| Plant | Common name | Studied in |
|---|
| Dahlia spp. | Dahlia | Herbology U3L20 (mentioned) |
| Daucus carota | Wild carrot, Queen Anne's lace; carrot (subsp. *sativus*) | Herbology U1L3, U1L4, U1L6, U2L15, U4L30, U5L33, U5L34, U5L35, U5L37 (featured) |
| Dianthus barbatus | Sweet william | Herbology U2L15 (mentioned) |
| Dicentra spectabilis | Bleeding heart | Herbology U3L20 (mentioned) |
| Dieffenbachia spp. | Dieffenbachia, dumb cane | Herbology U1L6 (mentioned) |
| Digitalis purpurea | Foxglove | Herbology U1L6, U2L15, U3L17, U4L30, U5L33 (featured) |
| Dionaea muscipula | Venus flytrap | Herbology U5L35 (mentioned) |
| Dioscorea spp. (D. villosa) | Yam, wild yam | Herbology U1L5, U5L35 (mentioned) |
| Drosera spp. | Sundew | Herbology U5L35 (mentioned) |
| Plant | Common name | Studied in |
|---|
| Lactuca sativa | Lettuce | Herbology U2L12, U2L14, U3L17, U4L30, U5L34, U5L37 (featured) |
| Lathyrus odoratus | Sweet pea | Herbology U2L15, U3L18 (mentioned) |
| Laurus nobilis | Bay laurel | Herbology U4L28; Potions U1L8, U2L10, U2L11, U2L13, U2L15, U3L18, U5L41 (featured) |
| Lavandula angustifolia | Lavender | Herbology U1L2, U1L4, U2L9, U2L14, U2L15, U3L18, U3L21, U4L27, U4L28, U4L29, U5L37; Potions U2L10, U2L14, U2L15, U3L25, U4L27, U4L30, U4L33, U5L36, U5L37, U5L40, U6L45 (featured) |
| Lens culinaris | Lentil | Herbology U1L5 (mentioned) |
| Ligusticum porteri | Osha | Herbology U5L35 (mentioned) |
| Lobularia maritima | Alyssum, sweet alyssum | Herbology U5L34 (mentioned) |
| Lonicera spp. | Honeysuckle | Herbology U3L21 (mentioned) |
| Lophophora williamsii | Peyote | Herbology U5L35 (mentioned) |
| Lupinus spp. | Lupine | Herbology U3L18 (mentioned) |
| Lycopodium spp. | Club moss | Potions U2L11 (mentioned) |
| Plant | Common name | Studied in |
|---|
| Marine macroalgae (kelp et al.) | Seaweed **[ALGA — not a true plant]** | Herbology U2L10 (mentioned) |
| Magnolia spp. | Magnolia | Herbology U3L21 (mentioned) |
| Mandragora officinarum | Mandrake | Herbology U1L5 (mentioned) |
| Matricaria chamomilla | Chamomile | Herbology U4L27, U4L28, U5L34; Potions U2L10, U2L12, U2L15, U2L17, U3L23, U3L25, U4L26, U4L27, U4L28, U4L29, U4L32, U5L37, U5L40 (featured) |
| Melissa officinalis | Lemon balm | Herbology U1L4; Potions U2L14, U4L27, U5L37 (featured) |
| Mentha × piperita | Peppermint (natural hybrid) | Herbology U1L4, U1L7, U2L16, U5L37; Potions U2L10, U2L14, U2L15, U4L27, U4L32 (featured) |
| Mentha aquatica | Water mint | Herbology U1L7 (mentioned) |
| Mentha pulegium | Pennyroyal | Herbology U5L36 (mentioned) |
| Mentha spicata | Spearmint | Herbology U1L4, U1L7, U4L31, U5L36 (featured) |
| Mentha spp. | Mint (unspecified) | Potions U1L5, U2L10, U2L11, U2L12, U2L14, U2L15, U4L27, U5L37 (featured) |
| Monarda didyma | Bee balm | Herbology U3L20 (mentioned) |
| Musa spp. | Banana | Herbology U1L5, U2L11 (mentioned) |
| Myristica fragrans | Nutmeg | Herbology U1L5; Potions U2L13, U3L18, U6L45 (mentioned) |
| Plant | Common name | Studied in |
|---|
| Ocimum basilicum | Basil | Herbology U1L1, U1L2, U1L4, U2L8, U2L9, U2L10, U2L14, U2L15, U2L16, U3L17, U3L19, U3L22, U3L23, U4L27, U4L28, U4L30, U4L31, U4L32, U5L34, U5L35, U5L37; Potions U2L11, U2L12, U2L14 (featured) |
| Olea europaea | Olive | Potions U2L15, U3L19, U4L26, U4L28, U4L31, U4L34, U5L35, U5L38, U5L39, U5L41, U5L42, U5L44, U6L46, U6L49 (featured) |
| Origanum majorana | Marjoram, sweet marjoram | Herbology U4L28; Potions U4L30 (mentioned) |
| Origanum vulgare | Oregano | Herbology U1L2, U1L4, U3L22, U4L27, U4L28, U4L31, U4L32, U5L37; Potions U1L7, U1L8, U2L10, U2L11, U2L14, U2L15, U3L21 (featured) |
| Oryza sativa | Rice | Herbology U1L5; Potions U3L21 (mentioned) |
| Plant | Common name | Studied in |
|---|
| Paeonia spp. | Peony | Herbology U3L20 (mentioned) |
| Panax quinquefolius | American ginseng | Herbology U5L35 (mentioned) |
| Papaver orientale | Oriental poppy | Herbology U3L20 (mentioned) |
| Pastinaca sativa | Parsnip | Herbology U4L30 (mentioned) |
| Pelargonium spp. | Geranium (scented) | Herbology U2L15; Potions U2L14 (mentioned) |
| Petroselinum crispum | Parsley | Herbology U1L1, U1L4, U2L15, U3L18, U4L27, U4L28, U4L30, U4L31, U5L37; Potions U2L12 (featured) |
| Petunia spp. | Petunia | Herbology U2L15 (mentioned) |
| Philodendron spp. | Philodendron | Herbology U1L6 (mentioned) |
| Pimenta dioica | Allspice | Potions U3L21 (featured) |
| Pimpinella anisum | Anise | Herbology U4L27, U4L28; Potions U2L13 (mentioned) |
| Pinus spp. | Pine (rosin, colophony, turpentine, pine soot, pine resin) | Herbology U2L9, U2L15; Potions U3L18, U4L31, U4L33, U6L48, U6L51 (featured) |
| Piper nigrum | Black pepper | Herbology U1L5; Potions U2L13 (featured) |
| Pistacia lentiscus | Mastic | Potions U4L31 (featured) |
| Pisum sativum | Pea (garden pea) | Herbology U1L5, U2L15, U3L17, U3L18, U4L30, U5L34 (mentioned) |
| Plantago spp. (P. media, P. major) | Plantain (hoary plantain) | Herbology U1L4, U5L35 (mentioned) |
| Polianthes tuberosa | Tuberose | Potions U2L14 (mentioned) |
| Prunus dulcis | Almond (sweet almond oil) | Potions U3L19, U3L25, U6L46 (featured) |
| Plant | Common name | Studied in |
|---|
| Raphanus sativus | Radish | Herbology U1L3, U2L11, U3L17, U4L30 (featured) |
| Reseda luteola | Weld, dyer's rocket | Potions U6L49 (mentioned) |
| Rhododendron spp. | Rhododendron, azalea | Herbology U3L21 (mentioned) |
| Ricinus communis | Castor bean, castor oil | Herbology U4L30, U5L33; Potions U3L19 (featured) |
| Rosa spp. (R. canina hips; R. damascena water) | Rose, rosehip, rosewater | Herbology U1L4, U2L8, U2L12, U3L17, U3L19, U3L21, U3L22, U3L23, U3L24; Potions U2L12, U2L14, U3L19, U3L21, U4L26, U4L27, U4L28, U4L33, U5L37, U5L40, U6L45, U6L46, U6L49 (featured) |
| Rubia tinctorum | Madder | Potions U5L40, U6L49 (featured) |
| Rubus fruticosus agg. | Blackberry | Herbology U3L21; Potions U6L49 (mentioned) |
| Rudbeckia hirta | Black-eyed Susan | Herbology U3L20 (mentioned) |
| Ruta graveolens | Rue | Herbology U1L6 (mentioned) |
| Plant | Common name | Studied in |
|---|
| Salvia officinalis | Sage, garden sage | Herbology U1L2, U1L4, U3L22, U4L27, U4L28, U4L30, U4L31; Potions U2L14, U4L30, U6L49 (featured) |
| Salvia rosmarinus (syn. Rosmarinus officinalis) | Rosemary | Herbology U1L2, U1L4, U1L5, U2L14, U2L15, U2L16, U3L19, U3L21, U4L27, U4L28, U4L30, U4L31, U5L37; Potions U2L11, U2L14, U3L21, U3L23, U3L25, U4L30, U4L32, U4L33, U5L37, U6L45, U6L46 (featured) |
| Sanguinaria canadensis | Bloodroot | Herbology U5L35 (mentioned) |
| Santalum album | Sandalwood | Potions U6L47 (mentioned) |
| Schlumbergera spp. | Christmas cactus, holiday cactus | Herbology U2L12 (mentioned) |
| Secale cereale | Rye | Herbology U2L13 (mentioned) |
| Senegalia senegal (syn. Acacia senegal) | Gum arabic (acacia) | Potions U6L48 (featured) |
| Setaria italica (millet spp.) | Millet | Herbology U1L5 (mentioned) |
| Simmondsia chinensis | Jojoba | Potions U6L45 (featured) |
| Solanum lycopersicum | Tomato | Herbology U1L5, U1L6, U2L12, U2L14, U3L25, U4L30, U5L34, U5L37 (featured) |
| Solanum melongena | Eggplant | Herbology U1L6 (mentioned) |
| Solanum tuberosum | Potato | Herbology U1L3, U1L5, U1L6 (featured) |
| Sorghum bicolor | Sorghum | Herbology U1L5 (mentioned) |
| Spathiphyllum spp. | Peace lily | Herbology U3L25 (mentioned) |
| Sphagnum spp. | Sphagnum moss | Herbology U3L21 (featured) |
| Spinacia oleracea | Spinach | Herbology U2L12 (mentioned) |
| Stachys byzantina | Lamb's ear | Herbology U3L20 (mentioned) |
| Stellaria media | Chickweed | Herbology U2L15 (mentioned) |
| Styrax spp. (S. benzoin) | Benzoin, gum benjamin | Potions U3L19, U6L47 (featured) |
| Symphytum officinale | Comfrey | Herbology U1L6, U4L27, U5L37 (mentioned) |
| Symphyotrichum spp. | Aster | Herbology U2L12, U3L20 (mentioned) |
| Syringa vulgaris | Lilac | Herbology U2L15 (mentioned) |
| Syzygium aromaticum | Clove | Herbology U1L5; Potions U2L10, U2L11, U2L13, U2L15, U3L18, U3L23, U4L30, U5L37, U6L45, U6L47 (featured) |
| Plant | Common name | Studied in |
|---|
| Tagetes spp. (T. patula featured) | Marigold (French marigold) | Herbology U2L15, U4L30, U5L34, U5L37; Potions U6L49 (featured) |
| Tanacetum vulgare | Tansy | Potions U5L37 (mentioned) |
| Taraxacum officinale | Dandelion | Herbology U1L3, U1L4, U5L35, U5L37; Potions U3L18 (mentioned) |
| Taxus baccata | Yew | Herbology U5L33 (featured) |
| Tectona grandis | Teak | Herbology U1L4 (mentioned) |
| Theobroma cacao | Cacao, cocoa (butter) | Potions U3L19, U4L29, U5L40 (featured) |
| Thymus vulgaris | Thyme, common thyme | Herbology U1L2, U1L4, U3L19, U3L21, U3L22, U4L27, U4L28, U4L30, U4L31, U5L37; Potions U1L7, U2L11, U2L14, U2L15, U4L28, U4L30 (featured) |
| Trigonella foenum-graecum | Fenugreek (blue fenugreek) | Potions U2L16 (mentioned) |
| Trillium spp. | Trillium, beth root, wake-robin | Herbology U5L35 (mentioned) |
| Triticum aestivum | Wheat | Herbology U1L3, U1L5, U2L15 (mentioned) |
| Tropaeolum majus | Nasturtium | Herbology U3L18, U5L34 (mentioned) |
Safety lives in the entries themselves: any plant that can harm is marked in its entry, and the book follows the school's standing rule — identification is done with eyes and fingertips, never with the mouth.