220 
IOWA ACADEMY OF SCIENCES. 
Apios. 
387 . A . apios (L . ) MacM . {A . tuherosa Moench . ) Thick' 
ets along streams; frequent. 
Strophostyles. 
388. S. helvola (L) Britt. (S. angidosa Ell.) Sandy 
ground; scarce. 
GERANIACE^. 
Geranium. 
389. G. maculatmn L. Woods and thickets common. 
390. G. caroliniamim L. Sterile ground; scarce. 
391. G, pusilltim L. About houses; becoming frequent. 
392. G. molle L. Waste ground; recently introduced. 
OXALIDACE^. 
OXALIS, 
393. 0. violacea L. Fields and open woods; abundant. 
394. 0. stricta L. (0. comiculata stricta Sav.) Woods, 
fields and waste ground; abundant, 
LINAGES. 
Linum. 
395. L, usitatissimum L. Occasionally escaped in waste 
ground. 
. 39(i, L. sulcatum Ridel. Dry, open ground; common. 
RUTACE^. 
Xanthoxylum. 
397. X. americanum Mill. Common in woods. 
POLYGALACE^. 
Poly GALA. 
398. P. verticillata li . Fields and waste ground; com- 
mon. 
399. P. viridescens L. Damp meadows; scarce. 
400. P. senega Open, stony ground; frequent. 
EUPHORBIACE^. 
Acalypha. 
401. A. virginicah. Abundant in woods and waste 
ground. 
