NOTES ON OUR LOCAL PLANTS _ 289 



hypocotyl itself soon begins to swell out, causing the epidermis 

 to crack and finally to peel off (Plate IX, Figs. 2, 3). Thus en- 

 larged, the hypocotyl serves as a place for food storage. The 

 second year two or three leaves are sent up from the epicotyl, and 

 from the base of each petiole these arises usually a secondary root. 

 These become enlarged until they resemble the swollen hypocotyl 

 in appearance and serve like it for food storage. (Plate X). 

 Commonly each leaf that arises thereafter produces such a root 

 and the result in old plants is a considerable cluster of such tuberous 

 roots. This shows then that the first tuber arises from the hypo- 

 cotyl and the others from secondary roots originating from the 

 base of the leaf petiole or just below it. 



De-^artment of Botany, 

 University of Notre Dame. 



NOTES ON OUR LOCAL PLANTS.— VIL 



BY J. A NIEUWLAND. 



Cerastium longipedunculatum Muhl., Cat., p. 46 (1813). 



Cerastium nutans Raf., Prec. Decouv., p. 36 (18 14). 



Nos. 1 1 146, 9149, 9132, South of South Bend, Ind., 822 

 North Liberty, St. Joseph Co., No. 2040. Notre Dame (Powers). 



Cerastium arvense Linn., Sp. PI., p. 438 (1753). 



Nos. 2546, 11031, 11241, 1 1085, Notre Dame, Ind., 2443, 

 2039, W. of Notre Dame, (Powers), 9240, 9202, N. of Notre Dame 

 at Webster's Station. 



ARENARIA Chabraeus, Sciagraphia, (1666), also 2nd Ed., 

 P- 550, (1677). 



Arenaria Guettard, Stamp., 2, p. 281 (1747), Ruppius, Fl. 

 Jen., (1718), p. 89 (1726), Arenaria Linn., Syst. (1735), Gen., p. 

 133 (1737), p. 193 (1754), Euthalia Ruprecht, Fl. Cauc, p. 220 



(1869). 



Arenaria serpyllifolia Linn., Sp. PI. p. 423 (1753). 



Arenaria multicaulis Linn, and Hesselgren, Pan Suecus, Am. 

 Acad., p. 248 (1751). Probably. Spergula multicaulis Dillenius, 

 Giss., p. 58 (17 1 8), Euthalia serpyllifolia Ruprecht, 1. c, Arenaria 

 hreviflora Gilib., Enum. PI. Ltih., 249, II, 155 (1781), Alsine 



