AROIDE® 169 
A. maculatum, L., Cuckoo-Pint, Lords-and- Ladies ; 
leaves spotted, appearing in the spring, spadix violet; 
hedge-banks; Switzerland, Pyrenees. A. z¢alicum, 
Mill. ; spadix yellow, leaves not always spotted; Ticino, 
Pyrenees. 
FC ART AShL: 
Spadix entirely covered with flowers; anthers on long 
filaments. 
C. palustris, L.; leaves cordate, spathe white inside ; 
marshes ; Lucerne, Vosges. 
2/ AGORUS;) | L. 
Perianth-segments membranous; stamens 6. 
A. Calamus, L.; Sweet-Flag; leaves ensiform ; wet 
places, rare. 
Order XCIX.—LEMNACE., 
Perianth 0; stem and leaves reduced to floating green 
disks. Aquatic plants; not alpine. 
1. LEMNA, L. 
Our four species of Duckweed, ZL. mznor, L., gibba, 
L., trisulca, L., and polyrhiza, L., all occur in Switzer- 
land, though the first only is common; they are very 
rarely seen in flower. 
2. WOLFFIA, Hork. 
An extremely minute floating plant, resembling Lemna, 
but much smaller; perianth o. 
W. arhiza, Wimm.; the smallest European flowering 
plant ; Switzerland, very rare. 
