174 REPORT OF NEW JERSEY STATE MUSEUM. 



Reported by Knieskern from Swimming River, Monmouth 

 Co., the only known locaHty in the State and not recently found 

 there so far as I know. No specimen seen. 

 Coast Strip.— Swimming River [Knieskern]. 



Order QRAMINALES. 



A larg-e group comprisnig the Grasses and Sedges. 



Family GRAMINE^. Grasses. 



Grasses may be distinguished from sedges by having hollow 

 culms, round or flattened in cross section, and fruit in the form 

 of grains. 



Flowering and Fruiting Data. — Dates given indicate the 

 season of full fresh panicles, racemes or spikelets, from the be- 

 ginning of the flowering season to the latest date, when fresh 

 intact inflorescence is still commonly present. 



a. Sv/eet scented, odor persisting after drying. 



b. Inflorescence in a compact spike. [Anthoxanthum odoratum]* 



bb. Inflorescence in an open panicle. Savastana, p. 216 



aa. Not sweet scented. 



b. Fruit a prickly bur. Cenchrus, p. 213 



bb. Fruit imbedded in the stalk (rachis), making a cylindrical, swollen, 



smooth or corrugated spike. 



c. Spike uniform throughout. Calorachis, p. 181 



cc. Spike with distinct staminate flowers above on a much more 



slender extension of the rachis. Tripsacum, p. 180 



bbb. Fruit not a bur nor imbedded in the rachis. 



c. Inflorescence obviously silky with soft hairs, appressed or in tufts. 

 d. Two large glumes embracing a spikelet of several flowers be- 

 tween them, plants green. Danthonia sericea, p. 231 

 dd. Inflorescence not in small spikelets, subtended by large 

 glumes, plants more or less rusty purplish or glaucous. 

 e. Pubescence largely rusty, inflorescence forming a dense 

 plume-like head 1-1.2 dm. long, 25-50 mm. broad or more, 

 maroon or chestnut, flowers long awned. Brianthus, p. 181 

 ee. Pubescence white or whitish. 



/. Hairs not reaching beyond the flower scales. Inflores- 

 cence in a long plume-like chestnut panicle. 



Sorghastrum, p. 184 



* Sweet Vernal Grass. Extensively introduced in fields, etc. 



