A STUDY OF RHUS GLABRA 1 79 



sessile by an abruptly acutisb base, 6-7 cm. long, saliently 

 serrate, tbe serratures 13-15 on a side, upper face dull deep 

 green, lower glaucous but less so than in R. glabra, the texture 

 thinner: fruiting panicle small comparatively, long-peduncled, 

 12-18 cm. long, oblong fusiform, not very compact, its branches 

 thinly tomentellous ; drupelets below medium size, notably 

 smaller than in R. glabra. 



Seems to take the place of R. glabra everywhere to the west- 

 ward of the Alleghenies in western Pennsylvania and New 

 York, and in northern Ohio. The station for the type is near 

 Ithaca, New York, as the name might indicate ; the type speci- 

 men is on sheet No. 225037 U. S. National Herbarium ; was 

 collected at Fall Creek, September, 1893, by K. M. Wiegand. 

 Sheet 292227 is the same from Westmoreland County, Penn- 

 sylvania, 1878, by P. E. Pierron, consisting of uppermost leaves 

 and a panicle each of staminate and pistillate flowers. It is 

 also in U. S. Herbarium in flower only, from Elyria, Lorain 

 County, northern Ohio, as collected in flower only by A. E. 

 Ricksecker, August 1, 1894. 



Excellent specimens, true to the type, are in the Herbarium 

 of the Geological Survey of Canada as follows : sheet 34165 

 from Sandwich, Ontario, by John Macoun, July, 1901 ; also 

 another from Bellville, Ontario, by the same as early as 1867, 

 this in male flower only. 



All the so-called Rhus glabra from the geographic region so 

 indicated, differs from the southern R. glabra and the New 

 England R. -pyramidata in points quite sufficient to establish it 

 in the rank of at least a strong subspecies. 



5. RHUS ASHEI (Small). 



Rhus Caroliniana Ashe, Bot. Gaz. 20: 548, 1895, not of Mil- 

 ler, Diet. 1768. 

 Schmaltzia Ashei Small, Fl. 729. 



Shrub erect but low, only 3-5 dm. high ; leaflets 13-17, oval 

 to oblong lanceolate, 5-7 cm. long, acute, not acuminate, sessile, 

 rather coarsely subserrate-dentate, the teeth about 10 on each 

 side, pale beneath but not glaucous : panicle of ovoid outline, 

 large for the plant, 10-15 cm - l° n g- 



