Materia Medica

Rose (Rosa × damascena) — Damask Rose, Rose Petals

September 30, 2026

Rose flowers and petals—especially Damask rose (Rosa × damascena)—have a long history in tea, rose water, syrups, preserves, skin care and traditional herbalism. This full guide covers practical preparations, petal chemistry, human research, harvesting, drying, growing, folklore, safety and the important differences among petals, rose hips, rose water and essential oil.

September 30, 2026

Rowan / European mountain ash (Sorbus aucuparia) is a traditional cooked wild fruit, wildlife tree and protective folklore plant. This full guide covers jelly, syrup, tea, raw-fruit and seed safety, parasorbic acid, polyphenols, cultivation, harvesting, Illinois growing conditions, wildlife value and European folklore.

September 30, 2026

Rue / Herb of Grace (Ruta graveolens) is a historically important Mediterranean herb used in food, household medicine, ritual, and protection traditions. This full guide covers botanical identity, traditional uses, furanocoumarins, essential oil, phototoxicity, growing, harvesting, folklore, and modern safety.

September 30, 2026

Safflower (Carthamus tinctorius) supplies both colorful flowers and an edible seed oil, but the two materials are not interchangeable. This evidence-aware guide covers Hong Hua tradition, human research on safflower oil and specialized extracts, pregnancy and bleeding cautions, and practical safety.

September 30, 2026

True saffron is the dried stigma of Crocus sativus, not safflower or turmeric. This evidence-aware guide reviews human research on mood, PMS and cognition; explains crocin, picrocrocin and safranal; covers adulteration and quality standards; and separates ordinary culinary use from concentrated medicinal use and pregnancy safety.

September 30, 2026

Indian sandalwood (Santalum album) is prized for aromatic heartwood and an essential oil rich in α- and β-santalol. This evidence-aware guide separates S. album from Australian sandalwood, red sandalwood, and Amyris; reviews traditional and modern research; and covers adulteration, traceable sourcing, topical safety, and why essential oil is not a casual oral remedy.

September 30, 2026

Sarsaparilla is a herbal trade name applied to the roots and rhizomes of several Smilax species rather than one universally defined botanical. This evidence-aware guide explains the species problem, steroidal saponins, historical uses, limited human evidence, common marketing myths, safety, and how to buy accurately labeled root.

September 30, 2026

Sassafras is an aromatic eastern North American tree with a long food, cultural, and herbal history. This guide separates traditional uses from modern evidence and explains the crucial distinction between safrole-containing root bark and oil versus regulated safrole-free food flavorings.

September 30, 2026

Savory is not one single plant. Summer savory (Satureja hortensis) and winter savory (Satureja montana) are closely related culinary and traditional medicinal herbs with different growth habits, flavor profiles, and chemistry. This guide separates food use from concentrated extracts and essential-oil research, and reviews what human evidence actually exists.

September 30, 2026

Self-heal, also called heal-all, all-heal and Xia Ku Cao, is a widespread perennial mint-family herb with a centuries-long wound, throat, food and traditional medicine history. This guide separates folklore from current human evidence, including a recent randomized trial, while keeping antiviral and anticancer laboratory findings in their proper context.

September 30, 2026

Senna is a well-established stimulant laxative herb, not a detox or weight-loss remedy. This guide explains modern taxonomy, leaf versus pod preparations, how sennosides work, what regulators recognize, short-term use, interactions, melanosis coli, and the risks of chronic or excessive use.

September 30, 2026

Shepherd’s purse is an edible mustard-family weed with a long traditional reputation for bleeding. This guide reviews modern taxonomy, identification, menstrual and postpartum clinical studies, the limits of hemostatic claims, pregnancy safety, and practical sourcing.