BICKNELL: FERNS AND FLOWERING PLANTS OF NANTUCKET 377 
Collected in the Thorn lot, June 27, 1910. It is scarcely to 
be doubted that it occurs elsewhere on the island. 
*CAREX CONOIDEA Schk. 
Damp field in Shawkemo not far from the harbor shore, well 
scattered through the grassy low growth about one spot, June 4, 
1909. 
*CAREX PRAIREA Dewey. 
Abundant in Shawaukemmo meadow where it appears to be 
strictly localized on Nantucket. In early bloom June 8, I911; in 
full flower July 1, 1912. 
*CAREX DIANDRA Schrank. 
With the above and much more mature, July 1, 1912, the 
achenia falling. 
*CAREX CEPHALOIDEA Dewey. 
A single tuft by a thicket at Shawaukemmo farm; spikes im- 
mature June 4, 1909; fully developed July 1, 1912. It is locally 
common on Chappaquiddick Island. 
CAREX STRAMINEA Willd. 
A recent enlightening study of this species by Mr. Kenneth K. 
Mackenzie (Bull. Torrey Club 42:603-608. 1915) has made it clear 
that, as commonly accepted, it has embraced two distinct species, 
one of them being the Carex tenera of Dewey (C. straminea var. tenera 
Boott). Carex straminea echinodes of Part III of this paper (Bull. 
Torrey Club 35: 496. 1908) should now be referred to C. tenera. 
An additional locality where it is rather numerous is in low grounds 
westward from Trot’s Swamp. It has not been met with on the 
eastern side of the island. True Carex straminea, specimens having 
been determined by Mr. Mackenzie, proves to be a not uncommon 
sedge of Nantucket inhabiting low grounds. 
CAREX ALATA Torr. 
Maxcy’s Pond, one tuft, June 17, 1910; also in a bog with 
Carex Walteriana Bailey and near Monomoy, June 28, 1912. 
*COMMELINA COMMUNIS L. 
Occasional in waste places, and by streetsides in the town. 
Juncus BuFontus L. 
The var. halophilus Buchenau & Fernald grows in abundance 
about ponds at the south shore of the island. 
