No. 5.] USTILAGINEH OF CONNECTICUT, 17 
oblong, dusty spore mass about 6-10 mm. in length; this is very 
temporarily protected by a thin transparent membrane, and 
upon dispersal of the spores nothing remains but the naked 
rhachis. The spores are lighter colored on one side, sub- 
spherical to spherical, or occasionally more elongated, minutely 
echinulate, especially on the lighter side, and chiefly 5-9» in 
length. 
Host and Distr.: Hordeum vulgare, Storrs, 1901; New 
Haven, July 8, 1902, June 15, 1904; Whitneyville, Sept. 24, 
1902; Westville, July 7, 1903. 
This is the loose smut of barley, and is rather common in 
the fields of this crop. The smuts of barley, oats, and oat 
grass, as will be seen by the descriptions, are very similar, in 
fact were not long ago considered one species. It requires 
the modified form of the hot-water treatment to prevent the 
loose smut of barley. 
Ustilago Panici-glauci (Wallr.) Wint. Fig. 49. The 
sori occur in all of the spikelets, are ovate, 2-3 mm. in length, 
and at first protected by thin transparent glumes, but soon rup- 
ture these, and scatter the dusty black-brown spore mass. The 
spores are dark reddish brown, ovoid, spherical or sometimes 
more elongated, prominently and abundantly echinulate, and 
10-14 in length. 
Host and Distr.: Setaria glauca, Southington, Aug. 8,’ 
1902; Bridgeport, Sept. 15, 1902; Berlin, Oct. 3, 1902; Glas- 
tonbury, Oct. 23, 1902; Andover, Sept. 15, 1903; New Canaan, 
Sept. 29, 1903; Manchester, Oct. 2, 1903. 
Throughout the United States this is a common smut on 
the yellow fox-tail grass, though it does not occur on the 
green fox-tail. ‘ . 
Ustilago Rabenhorstiana Kithn. Fig. 50. The sorus 
involves the entire inflorescence, changing it into a linear or 
oblong body, 3-5 cm. in length, which is usually hidden by 
the enveloping leaf sheath; it is covered for a short time by a 
very fragile transparent plant membrane, and within the dusty 
brown-black spore mass are often elongated remains of the 
plant tissues. The spores are reddish or olive brown, ovoid 
to spherical, or occasionally slightly angled, echinulate to ver- 
ruculose, and 10-14m in length. 
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