170 
FIFTEENTH REPORT. 
115. Smilax, rotundifolia, Lin., Yar. quadrangular is (Muhl.) 
Wood. Thickets. Rare. 
Family 17. Narcissaceae. 
11G. Hvpoxis hirsuta (Lin.) Coville. Yellow Star Grass. 
Marl bed. Common. 
Family 18. Dioscoriaeeae. 
117. Dioscorea villosa, Lin. Wild Yam. 
Thickets. Rare. 
The rhizome is a commercial article. Used in medicine as an 
expectorant, diaphoretic and antispasmodic. Useful in bilious 
colic, cramps of the stomach, uterine diseases, etc. 
Family 19. Iridaceae. 
118. Iris versicolor, Lin. Blue Flag. 
Low wet grounds. Frequent. 
119. Iris versicolor, Lin., Var. Virginica (Lin.) Baker. Blue Flag. 
Low, wet grounds. Frequent. 
There are two very pronounced forms of the Blue Flag both as 
to color and shape of the sepals. 
In the type the sepals are spatulate, the blade being rotund and 
abruptly rounded into the claw, light blue, variegated with white, 
yellow and green. In the variety the sepals are oblong-obovate, 
dark purple, variegated as in the type, but not so pronouncedly so. 
The rhizomes are a commercial product under the name Blue 
Flag, and were official under the name of Iris. They are used 
as a cathartic, cliolagogue and alterative. In treatment of dis- 
orders of the liver. 
120. Sisyrinchium albidum, Raf. Blue-eyed Grass. 
Barren Soil. Rare. 
Order X. Orchidales. 
Family 20. Orchidaceae. 
121. Cypripedium bulbosum, Mill., Yar. parviflorum (Salisb.) 
C. parviflorum, Salisb. Trans. Lin. Soc. 1 :77 pi. 2. Fig. 2. 1791. 
Ladies Slipper. 
Lip medium sized, yellow, vertically compressed. Rich woods. 
Rare. 
122. Cypripedium bulbosum, Mill., A ar. flavescens (D. C.) Ladies 
Slipper. 
G. flavescens D. C. Redoute, Lil. I : pi. 20, 1S02. 
Smaller, lip laterally compressed. 
Tamarack swamps. Rare. 
123. Cypripedium reginae, Walt. Ladies Slipper. 
Tamarack swamps. Frequent. 
The root system of species of Cypripedium is a commercial 
article under the name of Ladies Slipper, and a pharmacopoeial 
drug, under the title of Cypripedium. Used as a tonic and an- 
tispasmodic in nervous excitability, hysteria, nervous headache, 
etc. 
124. Pogonia ophioglossoides (Lin.) Ker. Snake Mouth. 
Marl bogs. Common. 
