Floristik, Geographie, Systematik etc. 221 



Nieuwland, J. A., A new genus of Ruhiaceae. (Amer. Midland 

 Nat. I p. 263—4. Dec. 1. 1910.) 



Bataprine , consisting of B. hispidida [Galiuni hispidtilum Michx.) 

 and B. unißora {G. uniflorum Michx.) Trelease. 



Ramaley, F., The Rocky Mountain Flora as related to cli- 

 mate. (Rep. brit. Ass. Sc. Winnipeg, Sect. K. p, 670—671. 1909.) 



The author's abstract of this communication states that the so- 

 called effects of altitude upon plant life are mainly the results of 

 diminished heat. The flora of the Rocky Mountains is much the 

 same from Canada to Colorado, but any particular species must 

 be looked for at higher altitudes as the observer travels south. The 

 mean temperatures for the summer months at Banff (Canada) at 

 altitude 1385 metres are nearly the same as those at stations in 

 Colorado at 3048 metres. The difference in latitude is about 12 

 degrees, and in this case one degree of latitude corresponds roughly 

 to 450 feet in altitude. The author would not neglect the impor- 

 tance of topographic features in determining a flora, but would 

 emphasise the point that, taken in the large, it is temperature rather 

 than topography, soil, or rainfall which permits or restricts the 

 extension of plants over great areas. W. G. Smith. 



Rydberg, P. A., Studies on the Rocky Mountain Flora. 

 XXIV. (Bull. Torrey Bot. Cl. XXXVII. p. 541—557. Nov. 1910.) 



Contains, as new: Saussurea densa (S. alpina densa Hook.), 5. 

 remotißora [S. alpina retnotißora Hook.), Carduus polyphyllus (C. 

 scopuloruin Rydb.), C. Butleri, C. lacerus, and C olivescens. The 

 foUowing probable hybrids are recorded: Carduus aniericanus X 

 griseus, C. aniericanus spathulatus, C. aniericanus X colorädensis, 

 C. acaulescens X ainericanus, C acaulescens X colorädensis, C acau- 

 lescens X scopuloruin, C. griseus X lateriflorus, C. griseus X scopu- 

 lorum, C. griseus X Parryi, C. oreophilus X scopuloruni, C. colorä- 

 densis X undulutus, C. filipendulus X ochrocentrus, C. Hoodtnanii 

 X megacephalus, C. plattensis X undulatus, C. niegacephalus X 

 ochrocentrus , C. foliosus X scopulorum, C. Butleri X Kelseyi, C. 

 Eatoni X olivescens and C. pulchellus X undulatus. Trelease. 



Sagorski, E. und L. Osswald. Ueber Formen der Gattung 

 Mentha im Thüringisch-^Herzynischen Florengebiete. 

 (xMitt. thüring. bot. Ver. N. F. XXVI. 83 pp. mit 8 Taf. 1910.) 



Als neu werden beschrieben: 



Mentha paludosaeformis Ossw. et Sag. (=: M. arvensis X < '^i^i- 

 dis)\ M. scharsfeldensis Sag. (=: M. aquatica X pipetita); M. triplex 

 Sag. (z= M. arvensis X < piperita)\ M. platyphylla Ossw. et Sag. 

 (= M. aquatica > X neinorosa)'^ M. intercedens Sag. (:= M. arvensis 

 X < longifoliä)\ M. helvetica H. Br. (= M. arvensis = nemorosa); 

 M. arvensis subsp. austriaca s. M. heterophylla Ossw. et Sag.; M. 

 gentilis subsp. gentilis y M. canipedunculata Ossw. et Sag.; M.gothica 

 H. Br. (= M. arvensis > X viridis); M. pseudo-Wirtgeniana Ossw. 

 et Sag. {-=1 M. arvensis X Wirtgeniana). Matouschek (Wien). 



