Flowers - Very small, bluish purple, clustered in axils of upper leaves. Calyx tubular, unequally 5-cleft; teeth of upper lip triangular, hairy in throat. Corolla 2-lipped, upper lip erect, notched; lower one 3-cleft, spreading; 2 anther-bearing stamens under upper lip; 2 sterile but apparent; 1 pistil with 2-cleft style. Stem: Low, erect, branched, square, hairy, 6 to 18 in. high. Leaves: Small, opposite, ovate to oblong, scantily toothed, strongly aromatic, pungent. Preferred Habitat - Dry fields, open woodland. Flowering Season - July-September. Distribution - Cape Breton Island westward to Nebraska, south to Florida.
However insignificant its flower, this common little plant unmistakably proclaims its presence throughout the neighborhood. So powerful is the pungent aroma of its leaves that dog doctors sprinkle them about freely in the kennels to kill fleas, a pest by no means exterminated in Southern Europe, however, where the true pennyroyal of commerce (Mentha Pulegium) is native. Herb gatherers who collect our pennyroyal, that is so similar to the European species it is similarly employed in medicine, say they can scent it from a greater distance than any other plant.
BASTARD PENNYROYAL, which, like the Self-heal, is sometimes called BLUE CURLS (Trichostema dichotomum), chooses dry fields, but preferably sandy ones, where we find its abundant, tiny blue flowers, that later change to purple, from July to October. Its balsam-like odor is not agreeable, neither has the plant beauty to recommend it; yet where it grows, from Maine to Florida, and west to Texas, it is likely to be so common we cannot well pass it unnoticed. The low, stiff, slender, much-branched, and rather clammy stem bears opposite, oblong, smooth-edged leaves narrowed into petioles. One, two, or three flowers, borne at the tips of the branches, soon fall off, leaving the 5-cleft calyx to cradle four exposed nutlets.
>From the five-lobed tubular corolla protrude four very long, curling, blue or violet stamens - hair stamens the Greek generic title signifies - and the pretty popular name of blue curls also has reference to these conspicuous filaments that are spirally coiled in the bud.
In general habit like the two preceding plants, the FALSE PENNYROYAL (Isanthus brachiatus) nevertheless prefers that its sandy home should be near streams. From Quebec to Georgia, westward to Minnesota and Texas, it blooms in midsummer, lifting its small, tubular, pale blue flowers from the axils of pointed, opposite leaves. An unusual characteristic in one of the mint tribe is that the five sharp lobes of its bell-shaped calyx, and the five rounded, spreading lobes of the corolla, are of equal length, hence its Greek name signifying an equal flower.
WILD or CREEPING THYME
(Thymus Serpyllum) Mint family
Flowers - Very small purple or pink purple, fragrant, clustered at ends of branches or in leaf axils. Hairy calyx and corolla 2-lipped, the latter with lower lip 3-cleft; stamens 4; style 2-cleft. Leaves: Oblong, opposite, aromatic. Stem: 4 to 12 in. long) creeping, woody, branched, forming dense cushions. Preferred Habitat - Roadsides, dry banks, and waste places. Flowering Season - June-September. Distribution - Naturalized from Europe. Nova Scotia to Middle States.
"I know a bank where the wild thyme blows,
Where oxlips and the nodding violet grows;
Quite over-canopied with luscious woodbine,
With sweet musk-roses, and with eglantine."
- A Midsummer Night's Dream.
According to Danish tradition, anyone waiting by an elder-bush on Midsummer Night at twelve o'clock will see the king of fairyland and all his retinue pass by and disport themselves in favorite haunts, among others the mounds of fragrant wild thyme. How well Shakespeare knew his folklore!
Thyme is said to have been one of the three plants which made the Virgin Mary's bed. Indeed, the European peasants have as many myths as there are quotations from the poets about this classic plant. Its very name denotes that it was used as an incense in Greek temples. No doubt it was the Common Thyme (T. vulgaris), an erect, tall plant cultivated in gardens here as a savory, that Horace says the Romans used so extensively for bee culture.