52 IOWA ACADEMY OF SCIENCE 
338. Polygonum sagittatum L. Arrow-leaved Tear-thumb. Abun- 
dant in marshes and marshy fields. 
339. Polygonum convolvulus L. Black Bindweed. In thickets and 
along railway tracks. 
340. Polygonum' scandens L. Climbing False Buckwheat. Same lo- 
calities as the above. 
341. Polygonum dumetorum L. Hedge Buckwheat. Similar to and 
found with the two preceding. 
342. Polygonum cuspidatum Sieb & Zucc. Japanese Knotweed. Culti- 
vated and locally established at Iowa City. 
FAGOPYRUM (Tourn) L. 
343. Fagopyrum esculentum Moensch. Buckwheat. Occasionally in 
waste places and along fields. 
CHENOPIDIACEAE. 
CYCLOLOMA Moq. 
344. Cycloloma atriplicif olium (Spreng) Coult. Winged Pigweed. Not 
scarce in sandy soil. 
CHENOPODIUM (Tourn) L. 
345. Chenopodium ambrosioides L. Yar. anthelminticum (L.) Gray. 
Wormseed. A weed in waste places. 
346. Chenopodium capitatum (L.) Ashe. Strawberry Blite. Rare; 
streets of Iowa City. 
347. Chenopodium glaucum L. Oak-leaved Goosefoot. Abundant in 
waste places, 
348. Chenopodium album L. Lambs Quarter. Abundant everywhere; 
very variable. 
349. Chenopodium hybridum L. Maple-leaved Goosefoot. Common in 
waste places. 
350. Chenopodium album Yar. viride (L.) Moq. Quite common. 
351. Chenopodium boscianum Moq. Bose’s Goosefoot. Common in 
woodlands. 
352. Chenopodium leptophyllum Nutt, Narrow-leaved Goosefoot. Rare 
on sand bars of Iowa River. 
