The Sundew (Ros solis, or Drosera rotundifolia) is a little plant
always eagerly recognised in marshy and heathy grounds by ardent
young botanists. In the sun its leaves seem tipped with dew
(drosos). It grows plentifully in Hampshire and the New Forest,
bearing a cluster of hairy leaves in a stellate form, at the top of a
slender stem. These leaves either from lack of other sustenance in so
barren a soil, or more prob
bly as an advance in plant evolution to a
higher grade of development, excrete a sticky moisture or dew,
which entangles unwary flies settling on the plant, and which serves
to digest these victims therewith. Each of the long red  hairs on
the leaves is viscid, and possesses a small secreting gland at its top.
Some writers say the word Sundew means sin ever, moist (dew).
The plant is also called Redrot, and Moor Grass, because the soil in
which it grows is unwholesome for sheep.
It goes further by the additional names of Youthwort, and
Lustwort--quia acrimonia sua sopitum veneris desiderium excitat
(Dodoeus). The fresh juice of the herb contains malic acid in a free
state, various salts, and a red colouring matter; also glucose, and a
peculiar crystallisable acid. Cattle of the female gender are said to
have their copulative instincts excited by eating even a small
quantity of the plant. Throughout Europe it has long been esteemed
a remedy of repute for chronic bronchitis and asthma; and more
recently, in the hands of homoeopathic practitioners, it has acquired
a fame for specifically curing whooping cough in its spasmodic
stages, after the first feverishness of this malady has become
subdued. It signally lessens the frequency and force of the
spasmodic attacks, besides diminishing the sickness.
Provers who have pushed on themselves the administration of the
Sundew in toxical quantities, developed hoarseness, with
expectoration of yellow mucus from the throat and upper lungs, as
well as a hacking cough, and loss of flesh, this combination of
symptoms closely resembling the form of tubercular consumption
which begins in the throat, and extends mischievously to the lungs.
Regarded from such point the Sundew may be justly pronounced a
homoeopathic antidote to consumptive disease of the nature here
indicated, when attacking spontaneously from constitutional causes.
 Moreover, country folk notice that sheep who eat the Sundew
in their pasturage have often a violent cough, and waste away. Dr.
Curie, of Paris, fed cats with this plant, and they died subsequently
with all the symptoms of lung consumption, their chest organs being
afterwards found studded with tubercular deposit though cats are not
ordinarily liable to tubercle.
So the Sundew may fairly be accepted as a medicinal Simple for
laryngeal and pulmonary consumption in its early stages, as well as
for whooping-cough, after the manner already explained. A tincture
is made (H.) from the entire fresh plant, with spirit of wine, of
which a couple of drops may be given in water several times a day,
to a child of from four to eight years old, for confirmed
whooping-cough; and if this dose seems to aggravate the paroxysms,
or to provoke sickness, it must be reduced in strength, and dilution.
Also from four to ten drops of the tincture may be administered with
a tablespoonful of cold water, two or three times a day, for several
consecutive weeks, to a consumptive adult, in the early stages of
this disease. Dr. Hughes (Brighton) has employed a diluted tincture
of the Sundew (one part of this tincture admixed with nine parts of
spirit of wine) in doses of from three to five drops with water,
to a child of from three to eight years of age, for spasmodic
whooping-cough, several times in the day, with marked success; whilst
a larger dose or the stronger tincture served only to increase the
cough in violence and frequency. The same results may perhaps follow
too strong or full a dose to a consumptive patient, so that it must be
regulated by the effects produced. Externally, the juice  of the
fresh Sundew has been used for destroying warts.