608 Angewandte Botanik 



&' 



versed in all directions by Strands of stereome. There is in the 

 stem a continuous sheath of pericyclic stereome mixed with sclere'i'ds. 

 Three types of hairs were observed on the leaves: stellate and 

 glandulär, the latter varying from almost sessile to long-stalked 

 with a pluricellular stalk. The midrib consists of an arch-shaped 

 mestome-strand with no endodermis, and without pericyclic stereome, 

 a structure that recurs in the petiole. Theo Holm. 



Holm, T., Medicinal plants of North America. 61. Lycopus 

 Virginicus L. (Merck's Report. XXI. p. 68—70. fig. 1 — 13. March 

 1912.) 



The whole herb is used, and it has a peculiar, balsamic odor, 

 and slightly bitter, nauseous taste; it is used as a mild narcotic, and 

 astringent in pulmonary and other hemorrhages. In New England 

 this species was used to dye wool, linen, and silk a black color. 

 The plant is figured, and the rhizome shows long tuberiferous 

 stolons. In regard to the anatomical structure a comparison is given 

 so as to show the structural distinctions observed in the other La- 

 biatae described in Merck's Report, and the following summary 

 may be of interest. The roots: Exodermis contractile in Cunila, 

 Glechoma; not contractile in Hedeoma, Collinsonia, Monarda, no 

 exodermis in Scutellaria, Lycopus. Pith developed only in Collinsonia. 

 The stem: Collenchyma in the four angles only Cunila, Lycopus, 

 Glechoma, Monarda, Scutellaria; as a closed sheath in Hedeoma, 

 Collinsonia, also in the stolons of Scutellaria. Pericycle a closed 

 stereomatic sheath in Monarda, Collinsonia, Cunila; pericycle paren- 

 chymatic in Hedeoma, Glechoma. Secondary leptoma contains sterei'ds 

 in Monarda. The leaf: Stomata on both faces in Collinsonia , Monarda; 

 on the dorsal face only in all the others. Stomata with subsidiary 

 cells in Lycopus, Hedeoma. Midrib a Stele of five mestome-strands 

 in Collinsonia; of two Strands in Cunila, Glechoma; of a Single 

 mestome-strand in all the others. Theo Holm. 



Holm, T., Medicinal plants of North America. 62. Epiphe- 

 gus Virginiana Bart. (Merck's Report. XXI. p. 129— 130. fig. 1-17. 

 May 1912.) 



Only a very few species of the family Orobancheae have been 

 used in medicine, and of these Epiphegus is undoubtedly the best 

 known. The fresh plant has a bitter, nauseous, astringent taste, and 

 has been given internally in bowel affections. The plant is figured 

 and described, and among the anatomical features may be mentioned 

 that the roots lack hairs and haustoria; they have no distinct endo- 

 dermis, and no pericambium; the root-stele is merely represented 

 by small Strands of leptome and Short rays of hadrome enclosing 

 a pith. In the basal, tuberous part of the stem the mestome-strands 

 have fused together so as to form concentric Strands, in which the 

 hadrome is surrounded by leptome. The scale-like leaves lack pali- 

 sade-cells and possess no mechanical tissues either. 



Theo Holm. 



Ausgegeben: 3 December 1912. 



Verlag von Gustav Fischer in Jena. 

 Buchdruckerei A. W. Si.ithoff in Leiden. 



