506 Floristik, Geographie, Systematik etc. 



l'existence de la foret Litana des anciens dans l'Apennin emilien, 

 foret que l'exploitation des siecles passes a detruite. 



Cette etude montre que la disparition du Sapin blanc de 

 l'Apennin emilien est due non ä un changement des conditions 

 physiques du milieu ambiant, comme on pourrait le croire, mais ä 

 Taction de l'homme. Toutes les autres discontinuites que le Sapin 

 blanc presente dans sa distribution dans la Peninsule italienne et 

 sa rarete dans ce territoire sont dues sans doute aussi ä l'action 

 destructrice de l'Jiomme. R. Pampanini. 



Coiozza, A., La ,,Scaevola montana Labill." novi e la „Scae- 

 vola Koenigii Vahl." (Malpighia. Vol. XX. p. 29—36. 1906.) 



Contrairement ä l'opinion des auteurs precedents, Bentham et 

 Mueller ont identifie le Scaevola Koenigii Vahl au Sc. montana 

 Labill. Mais la comparaison soignee des caracteres morphologiques 

 et anatomiques de ces deux plantes montre qu'elles different par 

 de nombreux caracteres qui autorisent ä les considerer corame des 

 especes distinctes. Au point de vue de la structure anatomique de 

 la tige et de* la feuille, le Sc. montana se rapproche du Sc. chamis- 

 soniana Gaudich plutöt que du Sc. Koenigii. 



On peut considerer le 5. Chamissoniana comme intermediaire 

 entre les deux autrss. R. Pampanini. 



Holm, Theo, Medicinal plants of North America. 3. Jeffer- 

 sonia diphylla (L.) Pers. (Merck's Report. XVI. p. 125—127. f. 1—12. 

 1907.) 



Mentions the medicinal properties and describes the structure 

 of the plant. Attention is called to the fact that the petals are nec- 

 tariferous as already described by Calloni (1887). Some of the roots 

 are mycorhizae besides being storage-roots; the scape and the rhizome 

 have no endodermis; the leaf is bifacial, and the stomata lack subsi- 

 diary cells; small round papillae abound on the dorsal face of the 

 blade; the midrib and the stronger lateral contain two mestome- 

 strands, which are collaieral and surrounded by a closed sheath of 

 stereome. Theo Holm. 



Hoim, Theo, Medicinal plants of North America. 4. Polygala 

 Senega L. (Merck's Report. XVI. p. 155-157. f. 1 — 11. 1907.) 



Discusses the history and the structure of the plant. Among the 

 anatomical characters may be mentioned the excentric development 

 of the secondary tissues in the root; some peculiar, short, unicellular 

 hairs with the apex very thickwalled and covered by cuticular gra- 

 nulations, a type known from Monnina; furthermore the presence 

 of an endodermis and stereomatic sheath in the stem; the presence 

 of collenchyma but lack of stereome in the leaves, and finally that 

 the smaller veins possess parenchyma-sheaths. Theo Holm. 



Holm, Theo, Medicinal plants öf North America. 5. Cunila 

 Maviana L. (Merck's Report. XVI. p. 188—189. f. 1—10. 1907.) 



Mentions the medicinal properties and describes the structure. 

 The rhizome consists of scaly shoots, which develop in the axils 

 of the basal leaves, and winter over. The leaves are covered with 

 roundish glandulär hairs of which the head is divided into several 

 cells by not only radial, but also by tangential divisions; the}»- are 

 located in cavities on both faces of the blade and are readily obser- 



