scholarly journals The “evil tribe” spreads across the land: A dated molecular phylogeny provides insight into dispersal, expansion, and biogeographic relationships within one of the largest tribes of the sunflower family (Vernonieae: Compositae)

2021 ◽  
Author(s):  
Sterling C. Keeley ◽  
Jason T. Cantley ◽  
Timothy J. Gallaher
2013 ◽  
Vol 169 (3) ◽  
pp. 548-579 ◽  
Author(s):  
Carlos Gutiérrez-Gutiérrez ◽  
Carolina Cantalapiedra-Navarrete ◽  
Efrén Remesal ◽  
Juan E. Palomares-Rius ◽  
Juan A. Navas-Cortés ◽  
...  

1966 ◽  
Vol 24 ◽  
pp. 322-330
Author(s):  
A. Beer

The investigations which I should like to summarize in this paper concern recent photo-electric luminosity determinations of O and B stars. Their final aim has been the derivation of new stellar distances, and some insight into certain patterns of galactic structure.


1984 ◽  
Vol 75 ◽  
pp. 461-469 ◽  
Author(s):  
Robert W. Hart

ABSTRACTThis paper models maximum entropy configurations of idealized gravitational ring systems. Such configurations are of interest because systems generally evolve toward an ultimate state of maximum randomness. For simplicity, attention is confined to ultimate states for which interparticle interactions are no longer of first order importance. The planets, in their orbits about the sun, are one example of such a ring system. The extent to which the present approximation yields insight into ring systems such as Saturn's is explored briefly.


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