PAXICE.E. 101 



has ii second staniiiKito flower below tlie perfect one. Tlic genns 

 has the hubit rather of the section Urachidvia of Pdiiiriiiii than 

 of PitsjHdiiin. but wants the sinull lower glume of the former genus, 

 and differs ;om both in tlie peculiar callus. A few species of I'aiii- 

 cuiii have more or less of a callus. 



There are about T species, 5 found in North America. 1 in Asia, 

 1 in Africa. Some extend to Australia. 



The most luitural key for aiding to lind the name of a species 

 Avoidd start out with a, those in which the fertile florets are mu- 

 cronate ; b, those in which the fertile parts are awnless. but have a 

 tuft of liairs at the apex. The following more artificial key may 

 be found easier and e(pially useful : 



A. Spikes f>-7. simple, erect (a) 



a. IMades short and l-l.T) cm. wide 1 



a. Blades long aiul narrow (b) 



b. Lower spikes 'Z cm. or less long 2 



b. Lower spikes 4-5 cm. long 3 



B. Spikes more than 7 (c) 



c. Spikelets abruptly pointc'l, 4 mi; . long 4 



c. Spikelets ovate-lanceolate, 3.5-4 mm. long 5 



c. Spikelets ovate-lanceolate, 5 or more mm. long. ... G 



1. E. Lemmoni Vas. & Scrib. Coult. Hot. Gaz. 9 : 185 (1884). 



Fio. 25. — EHochloa Lemtnoni. A, spikes; n, b, spikelets; c, floret. (Scribner.) 



Culms ascciuling. branching below, 50-00 cm. high, and with 

 the sheaths and blades clothed with fine, soft pubescence. Sheaths 



