Flowers - Light bluish purple, dotted with small specks of reddish violet; growing singly or in clusters along stem, seated in leaf axils; calyx hairy, with 5 sharp teeth; corolla tubular, over 1/2 in. long, 2-lipped, the upper lip 2-lobed, lower lip with 3 spreading lobes, middle one largest; 4 stamens in pairs under upper lip; the anther sacs spreading; pistil with 2-lobed style. Stem: Trailing, rooting at intervals, sometimes 18 in. long, leafy, the branches ascending. Leaves: From 1/2 to 1 1/2 in. across; smooth, rounded, kidney-shaped, scallop-edged. Preferred Habitat - Waste places, shady ground. Flowering Season - March-May. Distribution - Eastern half of Canada and the United States, from Georgia and Kansas northward.
Besides the larger flowers, containing both stamens and pistils, borne on this little immigrant, smaller female flowers, containing a pistil only, occur just as they do in thyme, mint, marjoram, and doubtless other members of the great family to which all belong. Muller attempted to prove that these small flowers, being the least showy, are the last to be visited by insects, which, having previously dusted themselves with pollen from the stamens of the larger flowers when they first open, are in a condition to make cross-fertilization certain. So much for the small flower's method of making insects serve its end; the larger flowers have another way. At first they are male; that is, the pistil is as yet undeveloped and the four stamens are mature, ready to shed pollen on any insect alighting on the lip. Later, when the stamens are past maturity, the pistil elongates itself and is ready for the reception of pollen brought from younger flowers. Many blossoms are male on the first day of opening, and female later, to protect themselves against self-fertilization.
In Europe, where the aromatic leaves of this little creeper were long ago used for fermenting and clarifying beer, it is known by such names as ale-hoof and gill ale-gill, it is said, being derived from the old French word, guiller, to ferment or make merry. Having trailed across Europe, the persistent hardy plant is now creeping its way over our continent, much to the disgust of cattle, which show unmistakable dislike for a single leaf caught up in a mouthful of herbage.
Very closely allied to the ground ivy is the CATMINT or CATNIP (Nepela Cataria) ,whose pale-purple, or nearly white flowers, dark-spotted, may be most easily named by crushing the coarsely toothed leaves in one's hand. It is curious how cats will seek out this hoary-hairy plant in the waste places where it grows and become half-crazed with delight over its aromatic odor.
SELF-HEAL; HEAL-ALL; BLUE CURLS; HEART-OF-THE-EARTH; BRUNELLA
(Prunella vulgaris) Mint family
Flowers - Purple and violet, in dense spikes, somewhat resembling a clover head; from 1/2 to 1 in. long in flower, becoming 4 times the length in fruit. Corolla tubular, irregularly 2-lipped, the upper lip darker and hood-like; the lower one 3-lobed, spreading, the middle and largest lobe fringed; 4 twin-like stamens ascending under upper lip; filaments ofthe lower and longer pair 2-toothed at summit, one of the teeth bearing an anther, the other tooth sterile; style thread-like, shorter than stamens, and terminating in a 2-cleft stigma. Calyx 2-parted, half the length of corolla, its teeth often hairy on edges. Stem: 2 in. to 2 ft. high, erect or reclining, simple or branched. Leaves: Opposite, oblong. Fruit: 4 nutlets, round and smooth. Preferred Habitat - Fields, roadsides, waste places. Flowering Season - May-October. Distribution - North America, Europe, Asia.
This humble, rusty green plant, weakly lopping over the surrounding grass, so that often only its insignificant purple, clover-like flower heads are visible, is another of those immigrants from the old countries which, having proved fittest in the fiercer struggle for existence there, has soon after its introduction here exceeded most of our more favored native flowers in numbers. Everywhere we find the heal-all, sometimes dusty and stunted by the roadside, sometimes truly beautiful in its fresh purple, violet, and white when perfectly developed under happy conditions. In England, where most flowers are deeper hued than with us, the heal-all is rich purple. What is the secret of this flower's successful march across three continents? As usual, the chief reason is to be found in the facility it offers insects to secure food; and the quantity of fertile seed it is therefore able to ripen as the result of their visits is its reward. Also, its flowering season is unusually long, and it is a tireless bloomer. It is finical in no respect; its sprawling stems root easily at the joints, and it is very hardy.
Several species of bumblebees enter the flower, which being set in dense clusters enables them to suck the nectar from each with the minimum loss of time, the smaller bee spending about two seconds to each. After allowing for the fraction of time it takes him to sweep his eyes and the top of his head with his forelegs to free them from the pollen which must inevitably be shaken from the stamen in the arch of the corolla as he dives deeply after the nectar in the bottom of the throat, and to pass the pollen, just as honeybees do, with the most amazing quickness, from the forelegs to the middle ones, and thence to the hairy "basket" on the hind ones - after making all allowances for such delays, this small worker is able to fertilize all the flowers in the fullest cluster in half a minute! When the contents of the baskets of two different species of bumblebees caught on this blossom were examined under the microscope, the pollen in one case proved to be heal-all, with some from the goldenrod, and a few grains of a third kind not identified; and in the other case; heal-all pollen and a small proportion of some unknown kind. Bees that are evidently out for both nectar and pollen on the same trip have been detected visiting white and yellow flowers on their way from one heal-all cluster to another; and this fact, together with the presence of more than one kind of pollen in the basket, shows that the generally accepted statement that bees confine themselves to flowers of one kind or color during a trip is not always according to fact.
The older name of the plant, Brunella, and the significant one, altered by Linnaeus into the softer sound it now bears, is doubtless derived from the German word, braune, the quinsy. Quaint old Parkinson reads: "This is generally called prunella and brunella from the Germans who called it brunellen, because it cureth that disease which they call die bruen, common to soldiers in campe, but especially in garrison, which is an inflammation of the mouth, throat, and tongue." Among the old herbalists who pretended to cure every ill that flesh is heir to with it, it was variously known as carpenter's herb, sicklewort, hook-heal, slough-heal, and brownwort.
AMERICAN or MOCK PENNYROYAL; TICKWEED; SQUAW MINT
(Hedeoma pulegioides) Mint family