271 BOTANICAL GAZETTE. 



No. I, 25 feet high, 13 inches in circumference near base. 

 No. 2, 32 feet 8 inches high, 13 inches '•' " 



No. 3, 31 " I inch " 16 '• " " 



The iMiSTLETOE is frequent in this region and always, so far as I 

 have observed, found on Nyssa nutltiflora or Acer rubruin. In hist Sep- 

 tember it was seen in fine fruit and also in lull flower. The books 

 which I can consult, give the flowering period as April or May. This, 

 I believe, is correct in the far south. Can it be. that in more north- 

 ern localities it flowers in the fall and perfects its fruit the next year, 

 as is the case with Hamameiis and Alnus maritima ? I should be glad 

 to have information upon this point. — VVm. M. Canuv. 



CalamagrOStiS Howellii, 11. sp.— Culms densely tufted, 

 10-20 inches high, erect, or somewhat geniculate below, smooth ; radi- 

 cil leaves loosely setaceous involute, firm but not rigid, in length 

 nearly equalling or even exceeding the culm, ligule conspicuous, about 

 I ]/; lines long, scarious , culm leaves about 3, narrow or filiform, 4 to 8 

 inches long, the upper on.e equalling the culm ; panicle pyramidal, 2 to 4 

 inches long, loose and spreading, rays mostly in fives, lower ones i to 

 114 inches long, numerously flowered above the middle ; spikelets pale 

 green or purple tinged, outer glumes lanceolate, acute, 2j4 to 3 hnes 

 long, nearly equal, membranaceous, i-nerved or the upper indistinct- 

 ly 3-nerved, flowering glume slighdy shorter than the outer ones, 

 ovate-lanceolate, acute, 4-nerved above, the apex with 2 mncrouate 

 ])ointed teeth, the consi)icuous strong awn inserted about the lower 

 third, half an inch long, palet rather shorter than its glume, bidentate 

 at the apex, basal hairs about half as long as the flower, those of the 

 rudiment rather longer. 



A well marked and handsome species, remarkable for the long 

 setaceous leaves, both radical and cauhne, and for the open jwnicle 

 and conspicuous awns. It is named for the discoverer, T. J. Howell, 

 Oregon. — Geo. Vasev. 



BlijJ^llt. — Editors Botanical Gazette: — Please permit me to 

 call the attention of your readers who are adepts in the use of the 

 compound microscope, to the subject of disease in plants by bacteria. 

 Last year accounts of my own investigations were published in the 

 transactions ot the American Association for the Advancement of Sci- 

 ence, Scientific American, American Naturalist, and elsewhere. These 

 had special reference to the so called "fire blight" of the pear and "twig- 

 blight" of the apple tree. Some much more limited studies upon the 

 "\ellows" of the ])each were also ]Miblished in "Science." The 

 ])roofs offered in these accounts were such as : — 



1. The uniform presence of a certain species of Bacteritnn in' the 

 dying tissues. 



2. The appearance of the disease upon inoculating healthy limbs 

 with this Bacferinift. 



3. The observed multiplication of the organism and the gradual 

 spread of the disease from the point of inoculation. 



The results fully convinced me that these diseases of our orchard 

 trees are directly due to the operations of this minute cryptogamic 



