BicKNELL : Ferns and flowering plants of Nantucket 5 



A shade form occurring in dry thickets is characterized by 

 extremely slender culms, growing singly or a few together, and a 

 very sparse inflorescence of only 1-9 flowers, some of them borne 

 on thread-form branches or pedicels sometimes 7 cm. long ; the 

 lanceolate-subulate perianth -parts are unusually thin and mem- 

 branous and conspicuously white-margined. 



A very slender and somewhat rigid form w^hich grew in sandy 

 soil near Sachacha Pond has elongated very narrow and involute 

 leaves and bracts, the latter erect and becoming i 5 cm. long, and 

 congested cymes, the perianth-parts thickened and somewhat shin- 

 ing. The ligule is shorter, firmer, and less scarious than in 

 typical tenuis and the character and aspect of the plant suggests 

 some involvement with /uncus dicJiotoimis^ a small form of which 

 was associated with it. 



An equally aberrant form has been determined by Doctor 

 Wiegand, who kindly examined all of my Nantucket material of 

 this group, as 



* Juncus tenuis anthelatus Wiegand. 



. This was collected near Millbrook Swamp, Aug, 19, 1906. 



Juncus Greenei Oakes & Tuckerm. 



A characteristic rush of Nantucket, occurring everywhere on 

 the dry moors and commons or sometimes in low sandy places 



/i 



A 



Miacomet Pond. The 



typical 



clustered, rise singly or a few together and are very slender and 

 elongated, becoming 8 dm. long and finally declined or prostrate ; 

 the inflorescence is sparse and few-flowered and subtended by 

 bracts sometimes 2 dm. long. 



* Juncus dichotomus Elk 



Very 



Inflores- 



J 



Two forms of this rush are to be especially noted — one, which 

 appears to be the typical plant, becomes 8 dm. tall and bears 

 somewhat open cymes of strictly secund, sessile flowers ; the other 



