78 



3. ^ S- ANDROCLADUM, (Engelm.) (5, simplex, Huds., v. andro- 

 cladtini, Engelm., in Gray, Man., Ed. 5, p. 481. 5. ramosum, 



Chapm. South. FL, 443.) 



Stems erect, slender, 2^-6 dm. high; the inflorescence 10- 



25 cm, long, usually close and narrow and bearing but few 

 branches, but sometimes branching extensively, A specimen 

 kindly given me by Dr. C. W. Swan, which was collected by Mr. 

 L. L. Dame on the island of Nantucket, has seven branches 

 and thirty-two heads, all but one of which are staminate. Pistil- 

 late heads three to seven, sessile or the lowest peduncled, axillary, 

 or the peduncles and branches axillary; ripe fruiting heads 12- 

 25 mm. In diameter ; nutlets fusiform, the body 5-6 mm. long by 3 

 broad, usually smooth but sometimes obtusely angular at the sum- 

 mit, oftentimes contracted strongly in the middle ; with a style and 

 stigma 6 mm. long, the stigmas as long as or shorter than the 



w 



styles, and occasionally double; stipe nearly 3 mm. long. The 

 plant grows in bogs or shallow water. Sometimes intermediate 

 forms between this and the following are found, reference to which 

 is made on p. 75. This species, as well as 5. eurycarpnm, has 

 often been confounded with 5. ramostcm. 



L ^^ 



Canada and New England to Florida, and northwest to Van- 

 couver's Island. 



Van FLUCTUANS. (5. simplex. Hud 

 ty, Man., Ed. 5, 481, non S. fiititans 



fl. 



Floating in deep water, with long, slender stems and thin, 

 flat leaves, 3-8 mm. in width. The inflorescence is usually short 



■ 



and close, 6-IO cm. long and 3 or 4 cm. broad, but sometimes 

 quite long and slender, as in a specimen from New Brunswick, 

 belonging to Prof. John Macoun, where the axis of the inflores- 

 cence and the lowest branch are each 15 cm. in length and only 

 2-5 cm. in breadth; ripe fruiting heads 8-12 mm. in diameter. 



Much as I dislike to multiply synonyms, it seems necessary 

 to change Dr. Engelmann's name of this plant, for two reasons ; 



ibh 



» 



and secondly, because Dr. E. named it "wd^v. fuitans,'' under the 

 impression that it is identical with S. Jluitans, Ft. ; but unless 

 that species is something very different from the plants so called 

 which are contained in our great Herbaria, or as described to me 



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