Bicknell : Ferns and flowering plants of Nantucket 183 



* Paspalum Muhlenbergii Nash. 



Rather common. The usual form has the leaves 4-8 mm. 

 wide, and rarely more than a single spike on the slender peduncle, 

 which is sometimes thinly pilose. At Shawkemo in damp soil a 

 few plants were met with having somewhat inflated sheaths, leaves 

 6-15 cm. wide, and shorter, pilose peduncles bearing twin spikes. 



The Nantucket plant sometimes seems to show a close ap- 

 proach to P. pnbescens Muhl. 



* Syntherisma filiforme (L.) Nash. 



Common in sandy soil, especially in the neighborhood of the 

 town, extending along roadsides to far-outlying points, as near 

 Wauwinet and Long Pond. 



Syntherisma humifusum (Pers.) Ryd. 



Very common generally, often in abundance along sandy 

 roadsides. 



Syntherisma sanguinale (L.) Dulac. 



Very common. 



Echinochloa Crus-galli (L.) Beauv. 



Common, mostly about and near the town and in the vicinity 

 of cultivated ground. About the shores of ponds on the south 

 side of the island occurs a form often much dwarfed and some- 

 times quite prostrate in the sand, having numerous reduced 

 panicles, and spikelets like the common barnyard plant but very 

 shortly awned. 



* Echinochloa Crus-galli mutica Vasey. 



Met with several times in or near the town, rather a small 

 form, the panicle sometimes reduced to 4-6 simple subsecund 

 short branches bearing loosely subsecund spikelets smaller than 

 in E. Crus-galli proper, with less hispid and awnless, acute or 

 mucronate scales. 



Echinochloa Walteri (Pursh) Nash. 



Occurs sparingly with E. Crus-galli in brackish soil about 

 ponds on the south shore. Growing with it was a reduced form, 

 appearing like a hybrid with £. Crus-galli, in which the sheaths 

 were glabrous or the lowest minutely pubescent but not at all 

 papillose. Not flowering until late August or September. 



