Group 1. 



TYLOSTOMA OCCIDENTALS (Plate 76). Peridium white, 

 with a small, tubular, circular, protruding mouth. Cortex adhering, 

 separating imperfectly, largely adhering in patches to the peridium, not 

 strongly thickened at the base. Stem pale, not scaly, strongly longi- 

 tudinally striate, white internally, hollow with a central fibril. Capilli- 

 tium slightly colored, with plane or oblique unthickening septa. Spores 

 4-5 mic., almost smooth. 



This species is very close to Tylostoma albicans, but on comparison 

 is quite different. The peridium is much whiter, the stem strongly 

 striate, the spores smoother. 



SPECIMENS IN OUR COLLECTION. 

 Washington, W. N. Suksdorf. 



(Tylostoma armillatum of Europe, which I only know from what 

 is published, evidently belongs to this section.) 



Group 2. 



TYLOSTOMA VERRUCOSUM (Plate 76) .Peridium globose, 

 deeply colored, reddish brown, with a protruding, tubular mouth. Cor- 

 tex thin, adnate, verrucose,f persistent.J Stem deeply colored, covered 

 when growing with long, spreading scales which mostly fall away from 

 dried specimens leaving the stems with short scales. Capillitium faintly 

 colored, freely septate, not swollen at the septa. Spores 5-6 mic., 

 aculeate. 



This is evidently a very rare and local plant. I collected it once in com- 

 pany with Prof. Morgan who told me it was the first time he had seen it since 

 the original collection some ten or fifteen years before. I have received it from 

 no correspondent save Mr. Long, Texas, who sent two small specimens, but evi- 

 dently the same species. Tylostoma verrucosum is very close to Tylostoma 

 squamosum of Europe, having the same mouth, color, spores and stem scales, 

 and is in my opinion the American expression of the European plant. It differs 

 in its verrucose cortex and more robust habits. 



SPECIMENS IN OUR COLLECTION. 



Ohio (Preston), C. G. Lloyd; Texas, W. H. Long. (Note. We have from 

 Geo. G. Hedgcock, St. Louis, Mo., two specimens that are very close to this 

 species and yet in some characters are quite different. We do not wish to defi- 

 nitely refer them to this species, nor for the present to describe them as different, 

 so we pass them, hoping that other collections may be received that will throw 

 more light on them.) 



t The only other species we know having this verrucose cortex is Tylostoma 

 Leveilleanum of Hawaii. It is very much the same plant, with same spores, cortex 

 warts, color and stem scales. We would conclude the two to be synonymous were 

 it not that Leveilleanum is illustrated with a different mouth. None of the type 

 specimens now preserved show this feature definitely. 



1 1 have never noted any evidence that it "becomes smooth with age." 



13 



