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normal ones, 6-15 inches high, often terminated by a yellowish, 

 conical spike, raised from the bell-shaped upper sheath on a 

 stout fleshy pedicel one and one-half inches long. In loose wet 

 sand usually where it has been recently disturbed. The normal 

 fruiting form of the species. Some forms are strikingly like 

 Arvense campestre macrostachya. In position where not inun- 

 dated by the tides, the stomata of this variety are smaller and 

 more numerous, much like those of fluviatile, from one form of 

 which {intermedium) it can only be separated by anatomical 

 characters. In this form the stem bears many rosulae (flat, cir- 

 cular spots of silex), and the cross-walls of silica are disposed 

 in dots. It has many minor points of difference from true 

 luimile, and may even be of equal rank. Banks of river at Ames- 

 bury, Mass., reservoir at the Pines, Newburyport, Mass., river 

 bank at Bangor and Ft. Kent, Me. : Femald. 



2. Arvensiforme A. A. E. Stems prostrate or with ascend- 

 ing tip, branched throughout, or with 5-10 naked terminal inter- 

 nodes, lower branches usually longest and often bearing verticils 

 of 2-5 branchlets. Similar to Arvense decumbens, which late sea- 

 son forms greatly resemble. In some situations the stems are 

 ascending from base, when they show a distinct dorsi-ventral ap- 

 pearance, lost in pressed specimens. 



3. Gracile Milde. Stems ascending or erect, 6 inches to 

 2 feet high, very slender, 5-12 angled, branchless or bearing a 

 few short scattered branches, often terminated by a minute fruit- 

 spike. Dense patches in firm sand of river bank, where inun- 

 dated regularly by tides : the common form. The bounds of this 



Variety, as of No. 1, have purposely been set wide to include 

 otherwise unclassifiable forms. European specimens of this are 

 much stouter than is usual here, and there are minor differences 

 in sheaths, etc. Amesbury and West Newbury, Mass., Stillwater, 

 Me., Femald; Utica, N. Y., Dr. Haberer. 



4- Vulgare Milde. Stem ascending or erect, usually naked 

 below the 8-12 middle internodes, provided with short, mostly 

 erect branches, of which the middle ones are little if any longer, 

 often terminated by a medium sized, mostly sessile, green or 

 dark brown spike. Dense patches in firm sand and gravel, New- 

 buryport, Mass. ; Orono and St. Francis, Me., Femald; Utica, N, 

 Y., Dr. Haberer. 



