CATALOGUE OF PLANTS. 99 



770. L. sulcatum Riddell. 



Plentiful on the edgeB of the Plainfield Village "gravel-pit." 



July-Aug. 



This irf the only station known at present for this species in the 



State. A specimen ]>y Dr. Wright is in the U.of M. Herbarium. 



L. usiTATissiMUM L. Comuion Flax. 

 Untilled ground. ,July-Aug. 



Spontaneous about the West Michigan Fair Grounds; along the 

 C. & W. M. Ry., south of City (O.H.); Court St., City; along 

 the G. R. & I. Ry. (S.O.L.). 



771. L. Virginianum L. 



In moist shaded ground; infrequent. June-July. 

 Lambcrton Lake region; Crooked Lake region; Vergennes; John 

 Ball Park, City; on the bank of a creek near the school-house 

 on the LTpper River Road. 



RUTACEAE. Ruk Family. 

 PTELEA L. 



772. P. trifoiiata L. Hop-tree. Shrubby Trefoil. 

 Common along streams. June. 



XANTHOXYLUM L. Prickly Ash. 



773. X. Americanum Mill. Northern Prickly Ash. 

 Abundant along streams and in low ground. May. 



SIMARUBACEAE. Ailanthus Family. 

 AILANTHUS Desf. 



774. A. GLANDULOSA Ucsf. 



Spontaneous about the City from seeds and suckers. Mid-June. 



POLYGALACEAE, Milkwort Family. 

 POLYGALA L. Milkwort. 



775. P. cruciata L. 



Diamond St. Swamp, City (O.K.), Aug. 12, 1894. Rare. 



