78 THE AMERICAN BOTANIST, 



pinnate leaves spread to the sun as if it were mid-summer. 

 the next morning all laid in a tangled heap on the ground, 

 beneath the tree fallen straight down in the still air. The 

 Catalpa showed a similar condition and it was noticed 

 that the other trees thus affected were species whose centre 

 of distribution is in w^armer regions. Has this fact anj^- 

 thing to do with the case? If not, who can offer an ex- 

 planation ? Further observations are desirable. 



Common Names of Orange Hawkweed,— The orange 

 hawkweed (Hieracivm aiuantiacvm) is a plant not easily 

 overlooked and as a consequence it has accumulated a 

 variety of common names. Although it landed in America 

 as the orange hawkweed, its noxious qualities soon in- 

 duced the agricvilturistto re-christen it devil's paint-brush. 

 According to Gardening World it has been called grim and 

 collier in Great Britain in allusion to the sooty appearance 

 which the black hairs on stem and involucre give to it. 



The Eucalyptus as a Rival of Coal. — An article 

 in Forest Leaves states that the species of Eucalyptus 

 have a remarkable capacity for storing the energA' received 

 from the sun. Experiments in south Africa have shown, 

 that a forest of these trees will each year produce twenty 

 tons of fuel per acre. The dry timber is heavier than coal 

 and gives out as much heat when burned. The trees- 

 thrive best in hot moist regions and it is asserted that if 

 half the area capable of supporting the trees was planted 

 to Eucalyptus iortsts,'\t would yield nearly three hundred 

 times as much fuel per year, as the world now requires. 



Temperature and the Color of Lilacs. — A writer 

 in Gardening not^s that in forcing lilacs for winter bloom- 

 ing it is not necessar\^ to have white varieties to obtain 

 white flowers. Colored lilacs grown in a temperature 

 of 65 or 75 degrees in greenhouses with little ventilation, 

 all produce white flowers. The editor of The American 

 Botanist long ago pointed out a relation between blue 

 flowers and temperature. Flowers of this color are al- 

 ways most abimdant in cool weather, as in earh^ spring 



