359 



Polygonum pennsylvanicum L. (3238) 



Polygonum acre HBK. (3241) 



Polgonum persicaria L. (3253) Lady's Thumb 



Polygonum hydropiperoides Michaux. Mild Water Pepper 



Chenopodiaceae. Goosefoot Family. 



Cycloloma atriplicifolium (Spreng.) Coulter. (2975) Winged Pig- 

 weed 

 Chenopodium album L. Lamb's Quarters 

 Corispermum hyssopifolium L. (3226) Bug-seed 

 Salsola kali tenuifolia G. F. W. Mey. (2974) Russian Thistle 



Amaranthaceae. Amaranth Family. 

 Acnida tuberculata sul^nuda Wats. Water Hemp 



Caryophyllaceae. Pink Family. 



Arenaria stricta Michaux. (2510) Sandwort 



vSilene antirrhina L. (2449) Sleepy Catchfly 



Silene stellata (L. ) Alton f. (3267) Starry Campion 



Ceratophyllaceae. Hornwort Family. 

 Ceratophyllum demersum L. (Collected by Dr. H. A. Gleason.) 



Nymphaeaceae. Water Lily Family. 



Nymphaea advena Alton. (3015) Yellow Water Lily 

 Castalia tuberosa (Paine) Greene. (3204) White Water Lily 



Ranunculaceae. Crowfoot Family. 



Ranunculus aquatilis capillaceus DC. (Batrachium trichophyllum 



Bosch) (3014) White Water Crowfoot 

 Ranunculus delphinifolius Torrey. Yellow Water Crowfoot 

 Ranunculus sceleratus L. Cursed Crowfoot 

 Ranunculus pennsylvanicus L. f. (3244) Bristly Crowfoot 

 Anemone cylindrica A. Gray. (2761) Anemone 

 Anemone virginiana L. (3140) 

 Anemone canadensis L. (3029) 



Berberidaceae. Barberry Family. 

 Podophyllum peltatum L. (3056) May Apple 



(Cruci ferae) Brassicaceae. Mustard Family. 



Draba caroliniana Walt. (2477) 



Lepidium apetalum Willd. (3101) Peppergrass 



