77 



usually two and sessile or more commonly on peduncles 1^-5 

 cm. in length; when ripe the fruiting heads 2-^ cm. in diameter; 

 mature nutlets thick, hard, 8-10 mm. long, irregularly and ob- 

 tusely four to five angled, wedge-shaped, truncate at the apex, 

 the top rounded, flattened or depressed, abruptly tipped with the 

 style ; scales as many as the angles on the fruit, and often several 

 exterior ones, half as long as the fruit or more, expanding into a 

 spatulate apex, which is commonly eroded on the edges. 



As stated by Dr. Engelmann in Gray, Man., Ed. 5, p. 481, this 

 species has often been confounded with the European 5. ramosum, 

 Curtis, which does not occur in this country. It differs from that 

 not only in the greater size of the plant, which would not be of 

 much importance in itself, but in the magnitude of the fruit (as 

 may be seen in fig. 2 in the plate, where the two are represented 

 m contrast), and also in the number of the stigmas. 5. eiirycarpian 

 differs still more widely from the European S. iieglectiiin, the 

 fruit of which is outhned in fig. 4. 



Virginia to California and northward to Lower Canada. I 

 have seen no specimens from our Southern States or north of 

 Ontario. 

 2. vS, Greenei, n. sp. 



Quite similar to S, eiirycarp 



Stem 



9-15 dm. in height; inflorescence about 3^ dm. long, rather 

 narrower in outline than in 5. eiirycarptim, and the branches 

 rising at a sharper angle. Pistillate heads two on a branch and 

 sessile, the staminate lO-i; ; ripe fruiting heads 15-23 mm. in 

 diameter; nutlets fusiform, 9 mm. long by 5 broad, widest part 

 a little more than a quarter of the length from the summit, ob- 

 scurely angular, tapering to the base; about one third of the 

 stigmas in a head are double and they are. as long as the styles, 

 and both together not far from ^Y^ mm. in length; leaves similar 

 to those of 5. etirycarptim, triangular, channelled and partly 

 clasping at the base and flattened towards the apex, the largest 

 12 mm. wide by 16 cm. long. The fruit is shown in fig. 3. 



This interesting plant was collected by Prof. E. L. Greene, in 

 Sept., 1887, at Olema, Marin Co., California. It gives me great 

 pleasure to name it for the acute and enthusiastic botanist to 

 whom we owe its discovery. 



