MICHIGAN ACADEMY OF SCIENCE. 
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273. Glycine Apios, Lin. Ground Nut. 
Thickets. Occasional. 
Order XXI. Geraniales. 
Family 42. Linaceae. 
274. Linum humile, Mill. Flax. 
Roadsides. Frequent. 
Family 43. Oxalidaceae. 
273. Oxalis stricta, Lin. Wood Sorrel. 
Fields. Common. 
276. Oxalis corniculata, Lin. Wood Sorrel. 
0. oymosa , Small. 
Low grounds and borders of woods. Common. 
Family 44. Geraniaeeae. 
277. Geranium maculatum, Lin. Cranesbill. 
Swamps and open woods. Common. 
Official under the name of Geranium. A powerful astringent 
employed in diarrhoea, dysentery, etc. 
Family 45. Rutaceae. 
278. Xanthoxylum Americanum, Mill. Prickly Ash. 
Low grounds. Common. 
The bark is official under the name of Xanthoxylum. The berries 
also constitute a commercial article. Employed as a stimulant, 
tonic and alterative, in chronic rheumatism, flatulent colic, 
syphilitic, and hepatic affections. 
Family 46. Polygalaceae. 
279. Polygala paucifolia, Willd. Flowering Wintergreen. 
Bogs. Rare. 
Family 47. Tithymalaceae. 
280. Acalypha Virginica, Lin. Mercury. 
Low grounds. Common. 
281. Euphorbia corollata, Lin. Flowering Spurge. 
Fields and roadsides. Common. 
The root is a commercial drug employed in throat and lung 
troubles. 
282. Euphorbia Cyparissias, Lin. Scotch Heath. 
Roadsides. Common. 
283. Euphorbia glyptosperma, Engelm. Spurge. 
Railroad track. Frequent. 
284. Euphorbia maculata, Lin. Spurge. 
Fields. Common. 
285. Euphorbia nutans, Lag. 
Waste places. Common. 
Order XXII. Sapindales. 
Family 48. Pistaciaceae. 
2S6. Rhus Canadensis, Marshall. Sweet Sumach. 
Hillsides. Occasional. 
The bark of the root is a commercial drug; in medicine it is 
employed as an astringent in diarrhoea, dysentery, etc. 
287. Rhus glabra, Lin. Smooth Sumach. 
Hillsides. Frequent. 
The bark, leaves, and fruit are commercial drugs, the latter 
being official under the title of Rh us Glabra. Employed as an 
