TG 
ARACEAE 
Arisaema 
1. Lateral leaflets very rounded on lower side, tapering 
to base on the upper side; tube of spathe 3.5-7.0 cm. 
long, summit flange 2-8 mm. broad, hood 3-6 cm. broad; 
fruiting head 3-6 cm. Long... cc.esssecsscevcececveces Ae atrorubens 
1. Lateral leaflets narrowed subequally at base, not 
especially rounded on the lower side; measurements 
of other parts usually smaller than above but slightly 
OVEFLAPPING<.csccccesseresseseveerorersesecccnencsncoe As triphyllum 
Arisaema atrorubens (Ait.) Blume Jack-in-the-pulpit 
Java Farm. Infrequent; prefers moist, shaded sites. Along old 
entrance road under canopy of Liquidambar styraciflua, Fagus grandifolia, 
Quercus alba, Acer rubrum, etc. Associate species: Podophyllum peltatum. 
Also along moist terrace of Muddy Creek under canopy of Fraxinus 
americana and Platanus occidentalis. 
Ivy Neck. Moderately abundant in similar habitats, especially 
source of Scaffold Creek, under canopy of Liquidambar styraciflua, 
Acer rubrum, Robinia pseudoacacia, etc. Associate species: Viola spp., 
Podophyllum peltatum, Claytonia virginica. Higman 72, 600. 
A. triphyllum (L.) Schott Small Jack-in-the- 
pulpit 
Java Farm and Ivy Neck. Habitats and associate species the same 
as for A. atrorubens above. Higman 544. 
LEMNACEAE 
1. Floating frond flattish, ovate to circular; rootlets 
present, 1 to several. 
2. Rootlet 1; frond 1- to 5-nerved, green beneath..... Lemna 
2. Rootlets 2 or more; frond 4- to 15-nerved, purple 
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1. Floating frond ellipsoid to globose (like green rice); 
rootlets absent. Expected (Wolffia, Wolffiella). 
