Ai'H. 1900.] r.OTANICAL SOCIETY OF EDINBURGH 307 



the Krst rudiments of the vegetative tissue of a sporophyte, 

 has the full number, and the reduction occurs in the spore 

 mother-cells as in those higher Hepaticm investigated. 



Such information would further be of some value in 

 working out the theories of the rise of the sporophyte. 



REFERENCES. 



(1) Mebnert. — Biomeclianik. — Fischer Jena. 1898. 



(2) Thomson, J. A. — Mehnert's Principles of Development. — Proc. 



of Scot. Micr. Soc, 1898-99. 



(3) Pringsheini. — Jabrb, Bd. ix., 187S. 



(4) Treub.— Ann. d. Jard Bot. d. Buitenzorg, iv., 1884. 



(5) Lanir. — Apooamyaiid Sporangia on Fern Protballi. — Phil. Trans. 



Roy. Soc.,\-ol. 190, 1898 B. ; also Annals of Bot. vol. xii. 



(6) Bower. — Antithetic Alternation. — Annals of Bot., iv. 



(7) Do. — Studies on Sjwre-Producing Members. — Phil. Trans. 



Roy. Soc, vol. 185, 1894. 



(8) Do. —Theory of Strobilus. — Annals of Bot., vol. viii. 



(9) Klebs. — Alternation of Generations. — Annals of Bot., vol. xii. 



(10) Yaizey. — Splachnum Intens. — Annals of Bot., vol. v. 



(11) Strasbiirger. — Periodic Reduction of Chromosomes. — Annals of 



Bot., vol. viii. 



(12) Hartoir. — Alternation of Generations. — Annals of Bot., vol. xii. 



(13) Hertwig.— The Cell.— Engl. Transl. 



(14") Farmer and Williams. — Fucacefe. — Phil. Trans. Roy. Soc, vol. 



190, 1898 : also Annals of Bot.. vol. ix. 

 (l.'j) Beard and Murray. — Repi'oduction in Animals and Plants. — 



Annals of Bot., vol. ix. 

 (16) Campbell. — Mosses and Ferns. 



Artemisia stellekiaxa, Boss., in Scotland. By G. 

 Clakidge Druce, M.A., F.L.S. Communicated by Dr. E. 

 Stewart MacDougall, M.A. 



(Read 12th April 1900.) 



Artemisia stellcriana, Besser Abrotan. No. 66, t. 5, 

 1835. " Herba perennis, albido-incana, caulibus validis 

 erectis, foliis oblongis profundo pinnatifidis segmentis 

 plerisque simplicibus obtusus vel subobtusis Capitulis 

 in paniculam anguste thyrsoideam ramis inferioribus 

 distantibus racemosis dispositis, pedicellis brevibus vel 

 subuullis, involvocris globoso-campanulatis dense incanis, 

 squamis lanceolatis floi^ibus subiequantibus " (DC. Prod. 

 VI., 119). — " Eefugium Botanicum," W. Wilson Saunders, 

 April 1870, t. 203. 



The description in the " Eefugium " is from the pen of 

 Mr. J. G. Baker. 



