PANICE.E. 



101 



has a second staminate flower below the perfect one. The genus 

 has the habit rather of tlie section Brachiaria oi Panicum than 

 of Faspalum, but wants tlie small lower glume of the former genus, 

 and differs from both in tlie peculiar callus. A few species of Pani- 

 cuiii have more or less of a callus. 



There are about 7 species, 5 found in North America, 1 in Asia, 

 1 in Africa. Some extend to Australia. 



The most natural key for aiding to find the name of a species 

 would 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 hairs at the apex. The following more artificial key may 

 be found easier and equally useful : 



A. Spikes 6-7, simple, erect (a) 



a. Blades short and 1-1.5 cm. wide 1 



a. Blades long and narrow (b) 



b. Lower spikes 2 cm. or less long 2 



b. Lower spikes 4-5 cm. long 3 



B. Spikes more than 7 (c) 



c. Spikelets abruptly pointed, 4 mm. long 4 



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



c. Spikelets ovate-lanceolate, 5 or more mm. long. ... 6 



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



Fig. 25. — Eriochloa Lemmoni. A, spikes; a, b, spilielets; c, floret. (Scribner.) 



Culms ascending, branching below, 50-90 cm. high, and with 

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



