FLOWERING PLANTS OF NANTUCKET 369 
Panicum, p. 243). It has now been collected at four stations 
scattered within a distance of little more than a mile north and 
west of the town. At each station only a single tuft was found, 
or a few together, growing in association with P. depauperatum 
and P. meridionale. In many of its characters P. Owenae is 
somewhat intermediate between these abundant Nantucket grasses 
and, although they belong to rather distinct groups in their genus, 
the possibility seems to appear that P. Owenae may be a hybrid 
between them. P. Owenae has been figured in Britton and 
Brown’s Illustrated Flora from a specimen collected June 20, 1908. 
Panicum Bicknellii Nash. Collected a second time on Nan- 
tucket, June 17, 1911, on the downs east of Long Pond. 
Panicum dichotomum L. Additional localities are in Siasconset 
and Squam and near Sachacha Pond. 
Panicum tennesseense Ashe. This proves to be rather a com- 
mon species on Nantucket. 
Chaetochloa versicolor Bicknell. A restudy of this grass has 
not enabled me to view it as being the same as C. imberbis perennis 
(Hall) Scrib. (C. occidentalis Nash) to which it has been referred. 
Nor does its obviously closer relationship to true C. imberbis 
establish identity with that species. Although it is said to inter- 
grade with C. imberbis, I have yet to see specimens of mature 
plants that cannot readily be separated. 
Stipa avenacea L. Quite unexpectedly this grass has proved 
to be a characteristic species of Nantucket occurring, however, 
mainly on the eastern side of the island where it is well distributed 
and locally abundant. It is found in scrub oak barrens along the 
railroad and towards Siasconset and Sankaty Head, and in 
Wauwinet, Pocomo and Quaise; it is also common on the Smooth 
Hummocks on the western side of the island, and was observed on 
Tuckernuck. It is locally common on Chappaquiddick Island. 
Inflorescence appearing June 9, 1909; just in flower June 15, 1911, 
June 24, 1910. 
Alopecurus geniculatus L. Stations distant from the town are 
Quidnet and Millbrook swamp. 
Aira caryophyllea L. In full flower June 5, 1910, the larger 
