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IOWA ACADEMY OF SCIENCE Vol. XXV, 1918 



of the old eulni, the rhizomes resemble a group of thick- 

 ened buds M-ith coarse scales entirely covering them. The 

 new shoots arise in a cluster about the base of the 

 dead culm, the nodes of the rhizome being marked by a 

 new series of scales. From the cluster of new shoots a branch 

 rhizome may be sent out leading to another cluster. Long, 



. Fig. 127. — Andropogon nutans. Indian Grass. A, ligule ; B, sheath 

 old culm ; D, new shoot and bud ; E, old rhizome. 



C, 



coarse roots are sent out from the base of the old culm and nodes 

 of the rhizome. Lea.v«s, dull green, folded in bud. Blades flat, 

 pubescent, compressed at base. Sheath compressed, pubescent, 

 liigule narrow, membranous, toothed, truncate. Auricles present 

 in form of hairlike appendages, not distinct. 



Andropogon scoparius. Little Blue Stem. Figure 128. 

 Upright perennial. Ehizoanes slender, sending out many new 

 shoots from the base of the old culm, also one or two new 



