— 110 — 



brown, somewhat flexuous, white-bordered for 1-5 to 1-4 their 

 height. 



Found at intervals for a mile along the railroad grade at 

 North Hampton, N. H. At the foot of the grade, in moist soil 

 near a brook, probably from the same source as this, a form of 

 afhne grows, but the joints are often tumid and occasionally 

 geniculate, the branches when present like stems of this, tumid 

 jointed, often so gibbous as to rupture the sheath. Peculiar for 

 its small cespitose stems, dark sheaths and especially the tumid 

 or gibbous nodes, which make the stems thickest there, while 

 usually the nodes are contracted. 



This is near the European variety viride Milde, but differs in 

 having bands on the ridges, no rosulse in the grooves, and in 

 the tumid joints. 



5. Suksdorfi var. nov. Stems 1 to 2^/2 feet high, 1 to 3 

 lines wide, about 24 angled, rough, with cross-walls of silex, 

 rarely with ends elevated to two rows of tubercles ; stomata in 

 single rows, rarely double for a short distance, each stoma con- 

 nected at top and bottom with its opposite by rows of rosulse 

 formed by the silex bands of the grooves throwing up tubercles 

 on each cell of the epidermis, which open at top to circular 

 jagged disks, these often obscured later by a washing of silex, but 

 always shown near the tops of the stems and on the branches; 

 sheaths elongated, cylindrical, tight, black, developing a ring of 

 tawny white which gradually increases till it occupies the whole 

 sheath except a narrow black basal ring and a narrow black 

 limb formed by the horny tips of the leaves ; leaves linear, nar- 

 rowed above the middle, the lower 2-3 keeled, the upper third 

 flat, rarely with a narrow carinal groove above, tipped with a 

 small, black, horny, hyaline-bordered point ; teeth articulated to 

 the leaves, black-centered, soon fading, withering and deciduous. 



Anatomy of hiemale, the carinal bast elongated along the dis- 

 sepiment, the vallecular much smaller but often similar in shape. 

 Upper 1 to 3 nodes bearing 1 to 4 branches each, which overtop 

 the stem and bear contemporaneous spikelets. 



This would be a noteworthy variety even if it bore no branches. 

 It is the only American iform of heimale known to me, except 

 occasionally intermedium which bears branches with the first 



