Botany of Illinois and Missouri. 1 1 3 



Spiraea opulifolia. Lin. 

 Hab. Bank of the Mississippi near St. Louis — May. 



Spiraea aruncus. 



americana. Pursh. 

 Hab. Banks of the Merrimack river, Missouri — June. 

 Obs. Stem three to four feet high. Flowers small, her- 

 maphrodite. Leaves triply pinnate ; leafets ovate, acumi- 

 nate, pubescent on the under surface. 



Gillenia stipulacea. Nutt. 

 Hab. Hills near Potosi, Missouri — June. 



ICOSANDRIA. POLYGYNIA. 



Rosa parviflora. Ehrh. 

 Rosa Carolina. Lin. 

 Both species are common on the prairies near St. Louis, 

 and flower in June. 



Rosa rubifolia. Brown in Hort. Kew. 



Fruit subglobose and with the peduncles glandular-hispid. 

 Stem smooth. Prickles solitary, short, uncinate. Leaves 

 petioled, ternate ; leafets ovate, acute, serrate, glabrous 

 above, white-downy beneath. Calyx with ovate, acute or 

 acuminate segments, which are covered with viscid hairs. 

 Flowers corymbose. Petals large, cuneate, white, pink 

 and red. 



Obs. A very branching shrub, from six to eight feet high, 

 common on the prairies near St. Louis. I have sometimes 

 seen the bushes assume a conical form, and completely cov- 

 ered with flowers. The color of the petals when they are 

 first unfolded is white, this in a few days is changed to pink, 

 and before the end of the flowering season this last is again 

 changed to a deep red. Hence Mr. Bradbury who consid- 

 ered it a new species proposed the name of mutabilis. But 

 it is undoubtedly R. rubifolia. It flowers from June to August. 



Rubus trivialis. Lin. 

 Rubus villosus. Ait. 

 Both species are common on the barrens, near St. Louis — 

 May. 



Geum album. Willd. 

 Geum virginianum. Lin. 

 Both found on the banks of the Mississippi, near St. Louis 

 — June. 



Vol. XIV.— No. 1. 15 



