422 BICKNELL: FERNS AND FLOWERING PLANTS OF NANTUCKET 
EuPHORBIA CyPARIssIAs L. 
Fence borders and about farmhouses and abandoned grounds. 
Just in flower May 30, 1909; in full flower June 3, I91I, June 15, 
1910; passing out of bloom later in the month. No set fruit 
observed. 
CALLITRICHACEAE 
CALLITRICHE HETEROPHYLLA Pursh. 
Common in brooks, pools, and springy places or on drying 
mud where the water has receded. Mature fruit June 3, I9II, 
Sept. 5, 1904. 
EMPETRACEAE 
CorEMA Conrapil Torrey. 
Locally abundant in the southeast quarter of the island, ex- 
tending from north of the third milestone on the state road to 
Siasconset, within a quarter of a mile of the shore and into the 
South Pasture. This general area extends in a northwest and 
southeast direction south of Saul’s Hills for a distance of about 
four miles and is two miles or more in greatest breadth. It is a 
territory of level or gently rolling plains and open barrens of 
scrub oak and affords conditions that manifestly meet well the 
needs of this very local species. Where most abundant it grows 
in widespread profusion, covering the ground with a o 
heathlike carpet for rods together, perhaps even acres, OF when i 
evera 
more interrupted growth forming firm cushionlike masses °° 
yards across. Here and there it has extended its growth thickly 
along old wagon trails on the moors, which have opened a way a 
it through the dense carpeting of bearberry with which its mor" 
lively green makes striking contrast. Parts of these long unu ri 
roadways have thus been almost completely obliterated, the : 
wagon ruts once deeply scored in the sandy soil being marked sad 
by shallow parallel grooves along the dense masses of this wees 
tive compact shrub cushioned up between them. Le . 
myself met with it outside of the general area indicated gi 
near Tawpaushas Swamp, about two miles from the town, “™ 
Owen, however, mentions what may be still another smraesy 
‘‘Road from town to Polpis,’’ her authority being Miss ate 
1867. It is still abundant in low places bordering Tom NEVE 
