sband. Her physician Eudemus prepared and the eunuch
Lygdus administered a slow poison, from the effects of which Drusus died
after a lingering illness. Although Tiberius is said to have received
the news of his death with indifference, there is no reason to suppose
that he had any hand in it; indeed, he seems to have entertained a
genuine affection for his son. Drusus was a man of violent passions, a
drunkard and a debauchee, but not entirely devoid of better feelings, as
is shown by his undoubtedly sincere grief at the death of Germanicus.
The cunning and reserve which he exhibited on occasion were probably due
to the instructions or influence of Tiberius (_Annals_, iii. 8), since
he was himself naturally frank and open, and for this reason,
notwithstanding his vices, more popular than his father. He revelled in
bloody gladiatorial displays, and the sharpest swords used on such
occasions were called "Drusine."

See Tacitus, _Annals_, i. 76, iv. 8-11; Dio Cassius lvii. 13, 14;
Suetonius, _Tiberius_, 62; J. C. Tarver, _Tiberius the Tyrant_ (1902).

DRYADES, or HAMADRYADES, in Greek mythology, nymphs of trees and woods.
Each particular tree ([Greek: drus]) was the home of its own special
Dryad, who was supposed to be born and to die with it ([Greek: hama]).

DRYANDER, JONAS (1748-1810), Swedish botanist, was born in 1748. By his
uncle, Dr Lars Montin, to whom his education was entrusted, he was sent
to the university of Gothenburg, whence he removed to Lund. After taking
his degree there in 1776, he studied at Upsala under Linnaeus, and then
became for a time tutor to a young Swedish nobleman. He next visited
England, and, on the death of his friend Dr Daniel Charles Solander
(1736-1782), succeeded him as librarian to Sir Joseph Banks. He was
librarian to the Royal Society and also to the Linnean Society. Of the
latter, in 1788, he was one of the founders, and, when it was
incorporated by royal charter in 1802, he took a leading part in drawing
up its laws and regulations. He was vice-president of the society till
his death, which took place in London on the 19th of October 1810.
Besides papers in the Transactions of the Linnean and other societies,
Dryander published _Dissertatio gradualis fungos regno vegetabili
vindicans_ (Lund, 1776), and _Catalogus bibliothecae historico-naturalis
Josephi Banks, Bart._ (London, 1796-1800, 5 vols.). He also edited the
first and part of the second edition of W. Aiton'