Floristik und Systematik der Phanerogamen 429 



fectly wooden and winter in their whole extent, so that these 

 species are to be named (dwarfish) shrubs. 



All species have long and deep striking prime roots, the 

 root-hairs are long persistent, no Mycorrhizas. Root-tubers are 

 more common in heaths with a better soil. 



The transverse section of the shoot is more or less edged, 

 or winged. The green bark is rather significant, especially 

 where wings are developed (Sarothammis, Genista pllosa and 

 G. germanica), often palissades are found here. Mechanical 

 tissue especially in the bark. The wood is waved and hard. 



The stipiiles are reduced or none, the leaves are simple, 

 except those of Sarothammis, leathery or hairy, their direction 

 is oblique or vertical (isolateral structure), a tendency to win- 

 tering is to be found. The cell-walls of the epidermis are thick, 

 in all species some of these cells are mucilagineous. All species, 

 except Genista anglica, have bud-scales. 



G. anglica is the first flowering of the species in question, 

 thereafter Sarothammis, G. pilosa, G. germanica, G. tinctoria. 

 G. pilosa bears only a few legumes. 



All species are xerophilous, Sarothamnus and Genista pilosa 

 have some resemblance to the spartium-type; spines, small 

 leaves, thick epidermis, few stomata, faintly developed air-spaces, 

 strong mechanical tissue a. o. characterize the „Genista-type" 

 as xerophilous. Ove Paulsen (Copenhagen). 



Negri, G., La vegetazione della Collina di Torin o. 



(Mem. della R. Accademia delle Scienze di Torino. Ser. II. 



T. LV. 1905. p. 113—188.) 



Les collines de Turin constituent l'extremite septentrionale et 

 occidentale du Systeme orographique d'origine tertiaire qui se detachant 

 des Appennins s e p t e n tr i o n au x s'avance dans la plaine du Po 

 jusqu'au cours du fleuve qu'il longe entre Turin et Valenja Mon- 

 ier rato. L'auteur etudie les conditions que les differents iacteurs 

 ambiants offrent dans ce district ä la vie vegetale: il donne le 

 catalogue de sa flore, fruit des etudes des botanistes piemontais 

 continuees depuis un siecle et de ses recherches personnelles : il en 

 reconnait les associations vegetales et, en y relevant la presence de 

 nombreuses colonies de plantes microthermes, evideniment d'origine 

 glaciaire et dont Timportance va se reduisant de jour en jour, il cherche 

 ä tracer l'evolution de la vie vegetale dans la region en question du 

 quaternaire ä nos jours. II conclut que par action des variations de la 

 nature du sol et du domat dues particulierement ä l'aetion de l'homme, 

 ä l'ancienne Vegetation microtherme d'origine alpine, se substitue 

 graduellement une Vegetation megatherme d'origine mediterraneenne. 



G, Negri. 



Neuman, L. M., Bidrag tili kännedomen af floran vid 

 Saitenfjord och pä Su lit älma -om r ädet i Norge. 

 [Contributions to the knowledge of the flora at 

 Saitenfjord and the Sulitä Ima-district in nor- 

 th er n Norway.] (Botan. Notiser. 1905. p. 251—282, 

 323-327.) 



