36 
IOWA ACADEMY OF SCIENCE 
90. Sporobolus crtfpt andrus (Torr.) Gray. Sancl Dropseed. In sandy 
places ; scarce. 
91. Sporobolus heterolepis Gray. Northern Dropseed. Rather scarce 
in dry places, 
92. Sporobolus asper (Michx.) Kunth. Rough Rush Grass. Not 
common. 
CALAMAGROSTIS Adans. 
93. Calamagrostis canadensis (Michx.) Beauv. Blue Joint Grass. 
Common in fields and meadows. 
94. Calamagrostis inexpansa Gray. Bog Reed Grass. Scarce in moist 
meadows. 
AGROSTIS L. 
95. Agrostis alba L. Red Top. Abundant everywhere. 
96. Agrostis perennans (Walt.) Tuck. Thin Grass. Common espe- 
cially in moist places. 
97. Agrostis hy emails (Walt.) Beauv. Rough Hair Grass. Common 
in fields and open woods. 
CINNA L. 
98. Cinna arundinacea L. Wood Reed Grass. Common in moist 
woodlands. 
SPHENOPHOLIS Scribn. 
99. Sphenopholis obtusata (Michx.) Scrib. Blunt-scaled Sphenopho- 
lis. Abundant. 
100. Sphenopliolis pollens (Spreng.) Scrib. Pale Sphenopholis, 
Equally plenty. 
KOELERIA Pers. 
101. Koeleria cristata (L.) Pers. Dog-tail Grass. Abundant in dry 
soil. 
DANTHONIA DC. 
102. Danlhonia spicatd (L.) Beauv. Wild Oat Grass. On dry wooded 
hillsides, rare. 
SPARTINA Schreb. 
103. Spartma michauxiana Hitchc. Slough Cut Grass. Abundant in 
marshes. 
BOUTELOUA Lag. 
104. Bouteloua hirsuta Lag. Hairy Mesquite Grass. Quite common 
in dry soils. 
105. Bouteloua curtipendula (Michx.) Torr/ Grama Grass. Plenty 
on clay or sandy soils. 
