Class III. Order I. 13 







petals lanceolate, slightly emarginate. Germs oblong, three 

 sided ; sides with two deep parallel grooves, the whole repre- 

 senting a cylinder with three smaller ones attached to its sides. 

 As the germ enlarges the distance between the two furrows 

 does not increase, and they are nearly obliterated in the capsule, 

 which is triangular and turgid with its three rows of seeds. 



Found at South Boston and Cambridge in the same places 

 with Iris Virginica, but much less frequent. June. Perennial. 



14. XYRIS. 

 XYRIS JUPICAI. Mich. Yellow eyed grass. 



Leaves linear, somewhat obtuse ; scape near 

 the head dilated, two edged ; scales rounded.. 

 Mieh. abr. 



Sijn. XTRIS CAROLINIANA. Lam. Poir. 



Root bulbous ; leaves grassy, shorter than the scape ; scape 

 erect, two edged, twisted, a little widened at top. Heads round- 

 ish, rather acute, supporting a number of small yellow florets 

 projecting out of the scales, hairy within, and consisting of three 

 ovate, crenate petals. Meadows. July, August. Perennial. 



15. SCHCENUS. 

 SCHOENUS ALBUS. L. White headed bog ruth. 



Culm three sided, leafy : flowers fascicled ; 

 leaves setaceous. 



A smooth, grassy plant, with white heads of flowers. Stem 

 half a foot or more in height, three sided, mostly smooth. Leaves 

 mostly belonging to the stem, alternate, sheathing, the sheaths 

 tubular or entire. Flowers in fascicles on footstalks, terminal 

 and axillary, erect. Glumes white, afterward becoming brown- 

 ish. Seeds surrounded with short hairs. In low woods and 

 swamps. Brighton. July. Perennial. 





