2 4. '5 



pairs. It is closely related to Allium anceps* and A . falcifolium. 

 The perianth segments of the former are linear-lanceolate, spread- 

 ing and in the proposed oblong-ovate, acuminate, erect. 



Allium falcifolium has the narrow perianth segments of A. 

 anceps and the rather thin curved leaves of the i)roposed species. 

 Allium anceps is also distinguished by its exserted stamens and 

 thick leaves. The width of the leaves of A. platyphyllum, 

 however, is nearly double that of A. falcifolium. 



■^ IVAR TiDESTROM. 



Stenophyllus floridanus in South Carolina. — In 1894 

 Mr. G. V. Nash collected in "high pine land" in Lake County, 

 Florida, a small annual sedge which was described the following 

 year in his account of the season's work as Stenophyllus floridanus 

 Britton.f For the next few years nothing else was known about 

 it, and it was probably regarded as one of numerous species 

 endemic to the lake region of Florida. But in the years 1900- 

 1908 I found it in many counties in the coastal plain of Georgia,! 

 always in unnatural habitats, such as cultivated fields and sandy 

 roadsides, and in 1909-1914 I found it occurring similarly in 

 Middle Florida. § On Aug. 22, 1913, while waiting for a con- 

 necting train at Branchville, Orangeburg County, South Carolina, 

 I found the same plant in sandy cotton fields right in the town; 

 and a little later in the day I saw considerable quantities of it 

 from the train, in fields in Dorchester County. 



Although this species was treated as a native when first 

 described, it is known only in habitats modified by civilization, 

 and therefore could hardly have existed in the United States in 

 prehistoric times. The fact that it was not recognized by 

 botanists before 1894, although it is amply distinct from other 

 southeastern species of the genus, and is now known in thirty or 

 forty counties, would seem to indicate that it is a comparatively 

 recent introduction, probably from the tropics. (It is very 

 similar to, if not identical with, Isolepis barbata (Rottb.) R. Br., 



* Curtis Bot. Mag. Ill; 32: t. 6227. 1876. 



t Bull. Torrey Club 22: 161. 1895. 



t See Ann. N. Y. Acad. Sci. 17: 283. 1906. 



§ See Ann. Rep. Fla. Geol. Surv. 6: 263, 286, 293. 1914. 



