240 Floristik, Geographie, Systematik etc. 



A number of species of Gormania, Cotyledon and Sedum are 

 transterred to Echeveria. New combinations: E. Watsonn {Gormania 

 Watsonn Brit., Cotyledon oregonensis Wats., not Sedum oreganiim 

 Nutt.), E. ohtusata [Sedum obtusatum Gray), E. debilis (S. debile 

 Wats.). E. oyegana (S. oyeganum Nutt.). E. Gormanii n. n. {Gorm.ania 

 laxa Britt. not E. laxa LindL), E. Brittonii n. n. {Gormania Hallii 

 Britt., not Dudleya Hallii Rose), E. Hallii {Dudleya Hallii Rose), 

 E Rusbyi {Cotyledon Rusbyi Greene), E. saxosa {Cotyledon saxosum 

 Jones), E. nevadensis (C. nevadensis Wats.), E. plattiana {C. plattiana 

 Jepson), E. palmeri (C Palmeri Wats.), E. Rosei n. n. {E. Palmeri 

 Rose not Wats.), E. lingula (C. lingula Wats.), E. Cotyledon {S Coty- 

 ledon ]sLCi\.), E. Setchellii (C. laxa Setchellii ]exiS,on), E. Jepsonii n. n. 

 {Cotyledon caespitosa paniculata Jepson, not E. paniculata Gray). 



Aster siskiyounensis n. n. {Eucephalus glabratus Greene, not 

 A. glabratus Kuntze), A perelegans n. n. {A. elegans T. and G., not 

 Willd.), A. kootenayi n. n. {A. Cusickii Lyallii Gray, not A. Lyallii 

 Kuntze). 



Chaenactis Mainsiana n. sp., allied to C. nevadensis (Kell.) Gray 

 and C. Evermannii Greene. 



Tonestus linearis n. sp., it is, by its slenderly linear parts 

 throughout, quite distinct from T. pygmaeus and T. Lyallii. 



Balsamorrhisa rosea n. sp. This is the second member in the 

 section Kalliactis Gray. It grows in the Rattlesnake Moun- 

 tains, Yakima County, Washington. B. serrata n. sp. Per- 

 haps nearcst B. deltoidea Nutt. It has been collected from Morrow 

 County, Oregon. Jongmans. 



Roberts, E. A., The Plant successions of the Holyoke 

 Range. (Botanical Gazette. LVIII. p. 432—444. with map. 1914.) 



The author gives the following summary at the end of the paper. 



The region (in the western central part of Massachusetts) is a 

 mountain ränge of trap rock. The climax forest of the region is of 

 the beech-maple-hemlock type. 



The successions may be classified as: I. Xerarch successions: 

 1. trap slope successions; 2. trap cliflf successions; 3. talus succes- 

 sions; II. Hydrarch successions: 1. ravine successions: 2. brook 

 successions. 



The terms initial and repetitive seem to be better than primary 

 and secundary in conveying the idea of often-repeated successions 

 such as are found in a frequently deforesting area. 



The east-facing and the south-facing trap slopes have the same 

 successions. Castanea dentata seems to present a temperary climax. 



The trap cliff doubtless presents an initial succession in which 

 the east and north cliffs have similar first stages, but the second 

 stage on the east is Pinus Strobus and Pinus resinosa, while on the 

 north it is Isuga canadensis. 



The combination of weathered rock with glacial drift on the 

 north talus slope affords a better opportunity for the climax forma- 

 tion than does rock alone on the talus east of Mt. Tom. 



Repeated deforestation has prevented all but a small area from 

 reaching the climax. Jongmans. 



Ausgegeben: 7 Miärz 1916. 



Verlag von Gustav Fischer in Jena. 

 Buchdruckerei A. W. Sythoff in Leiden. 



