3. _A. brachycalyx_ Fisch., a shrub of 3 feet high, growing on the
mountains of Persian Kurdistan, likewise affords tragacanth.
4. _A. gummifer_ Labill., a small shrub of wide distribution occurring
on the Lebanon and Mount Hermon in Syria, the Beryt Dagh in Cataonia,
the Arjish Dagh (Mount Argæus) near Kaisariyeh in Central Asia Minor,
and in Armenia and Northern Kurdistan.
5. _A. microcephalus_ Willd., like the preceding a widely distributed
species, extending from the south-west of Asia Minor to the north-east
coast, and to Turkish and Russian Armenia. A specimen of this
plant with incisions in the stem, was sent some years ago to the
Pharmaceutical Society by Mr. Maltass of Smyrna. We received a large
example of the same species, the stem of which is marked by old
incisions, from the Rev. W. A. Farnsworth of Kaisariyeh, who states
that tragacanth is collected from it on Mount Argæus.
6. _A. pycnocladus_ Boiss. et Haussk., nearly related to _A.
microcephalus_; it was discovered on the high mountains of Avroman and
Shahu in Persia by Professor Haussknecht, who states that it exudes
tragacanth in abundance.
7. _A. stromatodes_ Bunge, growing at an elevation of 5,000 feet on the
Akker Dagh range, near Marash in Northern Syria.
8. _A. kurdicus_ Boiss., a shrub 3 to 4 feet high, native of the
mountains of Cilicia and Cappadocia, extending thence to Kurdistan.
Haussknecht has informed us that from this and the last named species,
the so-called _Aintab Tragacanth_ is chiefly obtained.
[704] As described in Boissier’s _Flora Orientalis_, ii. (1872). We
have to thank Professor Haussknecht of Weimar for revising our list
of species, and for some valuable information as to the localities in
which the drug is produced.