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IOWA ACADEMY OF SCIENCE Vol. XXV, 1918 



Agrostis alha. Red Top. Figure 125. 



A perennial ; the bases of the culms are decumbent. Rhizomes 

 slender, one-sixteenth inch in diameter, scales formed at nodes; 

 Icng fibrous roots found at everj^ node. New shoots sent up from 

 terminal bud of old rhizome followed by buds at intermediate 

 nodes. Roots are numerous at base of a shoot, and a lesser num- 

 ber found at the nodes. Roots fibrous, slender. Leaves rolled in 

 the bud, dark green, glabrous, linear. Blade, flat linear, sharply- 

 pointed, one-fourth to one-half cm. wide, somewhat rough on 

 margin and surface, thin, coarsely nerved. Sheaths smooth, 



Fig. 125. — Agrostis alba. Red Top. A, ligule ; B,' terminal node and slioot ; 

 C, bud at node of rhizome ; D, base of old culm. 



hot compressed,- about the same length as the internodes, Ligule 

 acute, long, toothed, membranous, thin, white. Collar rather 

 narrow, divided into two distinct parts by a glabrous portion of 

 the blade. Auricles not present. 



Andropogon furcatus. Blue Stem. Figur-i^ 126. 



An upright perennial. The resting period was from November 

 to January. Rhizomes slender, woody, tough, clustered; nodes 

 enlarged, conspicuous scales enwrap the internodes. New rhiz- 

 omes appear first from the base of the old cluster. The new 

 shoots make their first appearance fro-m the base of the old 

 culms, followed 'by those from the terminal bud which does not 



