282 POACE^. 



59. (125). Phippsia E. Br. Suppl. App. Parry's Voy. 285 

 (1824). 



Spikelets 1-flowered, in a short spikelike or interrupted pani- 

 cle, rachilla articulate above the lower glumes and not jDroduced 

 above the floret. Empty glumes minute scales, 2 in number and 

 unequal, or only one; floral glume broad-oval, keeled, thin, 3- 

 nerved, 1.5 mm. long; palea shorter, oval, hyaline, truncate, 

 irregularly toothed, the two keels diverging. Stamen 1 or rarely 

 2-3. Styles short, distinct. Grain oblong, free. 



It is allied to Coleantlms and Sporoholus. One sjDecies and that 

 is found in the arctic regions of the northern hemisphere. 



1. P. algida (Soland.) R. Br. 1. c. Agrostisalgida, Wohl. Phipp's 

 Voy. 200 (1810?). Trichodium (dgiduin E. & S. Syst. 2:283 

 (1817). 



A smooth dwarf tufted annual, 5-7 cm. high, with short flat 

 obtuse leaf-blades. Panicle erect, narrow, scarcely exceeding the 

 leaves; chiefly distinguished from Sj^orobolus by the minute lower 

 empty glumes. 



Point Barrow; arctic coast. Dr. Murdoch in 

 1883. See Bot. Gaz. p. 25. 1886. A note by 

 Scribner, to the effect that the plant was col- 

 lected in wet gravelly places in Colorado, at 

 Chicago Lake and Georgetown, by H. N. 



I I'f^*^ Patterson, of Illinois. 



Fm. 51. —Phippsia 60. (126). SPOROBOLTJS E. Br. Prodr. 1 : 169 



%'%\o!te-^)- (1810)- F///«Beauv.Agrost. 16(1812). Ag- 

 rosticvla Eaddi, Agrost. Bras. 33 (1823). 

 Triachyrum Hochst. Flora 24: 1 (1841). 



Spikelets small, 1-2-flowered, in a narrow or loose and pyram- 

 idal panicle, rachilla very short, glabrous, scarcely articulate, not 

 continued beyond the flower. Empty glumes membranous, per- 

 sistent or separately deciduous, unawned, slightly keeled or convex, 

 obscurely 1-3-nerved, or the first nerveless; floral glume as long 

 as the empty glumes, or longer; palea as long as its glume or 

 shorter, with two nerves usually prominent, and readily splitting 



