Systematik d. Pterldophyten. — Systematik d. Phanerogamen. 31 



/Vlies 

 interference 



Allesie: La iaculte de Torganisme de manifester une 



Goethart. 



Hill, E. J., LycopocHum tristachviim. (Torreya. I. p, 76 — 77. 



July 1901.) 



Localities, in tre great-lake region, for this species, vvhich is usually 

 confounded with L. complanatiim. 



Trelease. 



Trelease, W., A cristate Pellaea. (Report Missouri Botanical 



Garden. XII. p. 77. PL 34. 6. April 1901.) 



A cristate form from Missouri described under the name Pellaea 

 atropurpnrea cristata. 



Trelease. 



Trelease, W., A Pacific-slope Palmetto. (Report 



Missouri Botanical Garden. XII. p. 79--80. PI. 35—37. 



April 1901.) 



Sabal Urssana, a glaucous, iarge-fruited species, from the vicinit}' 

 of üres, Sonora, Mex. 



Trelease. 



COVILLE, J. V., The willows oi Alaska. (Proceedings of 

 the Washington Academy of Sciences. III. p. 297 — 362. Fig. 17 

 —28 and pl. 33-42. Aug. 23. 1901.) 



This paper, constituting no. 24 of the Papers from the 

 Harr im an Alaska Expedition, enumerates 23 species of 

 Salix, of which 5 become trees, 7 erect bushes, and 1 1 are 

 prostrate. One of the trees, 6". ampllfolla is said to be con- 

 fined to Alaska, and one of the bushes (S. glaiica) and 

 one of the prostrate forms (S. reticulata) are strictly circum- 

 polary, the other species varying much in ränge, 9 being 

 common to Siberia and Alaska, 6 showing a relation-ship to 

 the flora of tre interior of the Continent, and the others be- 

 longing to the Pacific Coast Flora. Keys based on complete 

 specimens, and on pistillate leaf-bearing specimens, are given, 

 6". stolonlfera is the only species here named for the 

 first time. 



Trelease. 



Rydberg, P. A., St u dies on the Rocky Mountain flora. 

 VI. (Bulletin of the Torrey Botanical Club. September 

 1901. XXVIII.p. 499—513.) 



Trifolium stenolobiim, Vlcla producta, Primnla Americana, 

 Cuscuta gracllls, C. megalocarpa, Monarde cornata, Castllleja 

 Wyomlngensis, Sambucus microbotrys, Chrysothamnus filifollus, 

 C. scoparius, Aster crassulus , Machaeranthera rubricaulls, 

 Erlgeron laetevirens, Carduus Centaureae, C. erosus, C. oreo- 

 philus, C. griseus, C. pulclierrimus, C. oblanceolatus, Agoseris 



