[708] Botanische Zeitung, 1857. 33; Pharm. Journ. xviii. (1859) 370.
[709] Pringsheim’s Jahrbücher f. wissenchaftl. Botanik, iii. (1861) 117.
[710] Hanbury, Science Papers, 29.
[711] Pharm. Journ. xv. (1856) 18.
[712] Researches in Asia Minor, Pontus and Armenia, i. (1842) 492.
[713] In the Museum of the Pharmaceutical Society in London, there is some Flake Tragacanth remarkable for its enormous size, but in other respects precisely like the ordinary kind. The ribbon-like strips are as much as 2 inches wide and ³/₁₀ of an inch thick, and the largest which is several inches long weighs 2¾ ounces. Professor Haussknecht has informed us that he has seen in Luristan stems of Astragalus eriostylus Boiss. et Haussk. more than 6 feet in height and 5 inches in diameter, and bearing tragacanth. It is probable that the specimen of gum we have described was produced by some species attaining these extraordinary dimensions. Among the Kurdistan tragacanth, there occur curious cylindrical vermiform pieces, about ⅕ of an inch in diameter, coated with a network of woody fibre. We are told by Professor H. that they are picked out of the centre of cut off pieces of stem, split open by rapid drying in the sun.
[714] C. von Scherzer, Smyrna, Wien, 1873. 143.
[715] It is sometimes shipped from Bussorah.
[716] We accept those adopted by Boissier in his Flora Orientalis, ii. (1872) 202.
[717] Hist. Plant. lib. ix. c. 13.