IOWA ACADEMY OF SCIENCES 
43 
DBUFACEAE. 
Peunus. 
441. P. americana Marsh. Abundant in woods and along roadsides. 
^., 442. P. pennsylvanica L. f. Plenty in woods. 
443. P. virginiana L. Abundant in woods and along streams. 
444. P. demissa (Nutt.) Walp. Rare on prairies. 
445. P. serotina Ebrb. Abundant in woods. 
MIMOSaCEAE. 
Acuan. 
446. A. ilUnoensis (Micbx.) Kuntze. Plenty along streams. 
CAESALPINACEAE. 
Cassia. 
447. C. cTiamaecrista L. Abundant in sandy soil. 
Gleditsia. 
448. G. triacanthos L. Plenty in woods and along streams. 
Gymnocladus. 
449. G. dioica (L.) Koch. Plenty in woods. 
papilionaceae. 
Bapttsia. 
450. B. dracteata Ell. Abundant in fields and prairies. 
451. B. leucantha T. & G. Plenty in fields and meadows. 
Ceotalakia. 
452. C. sagittalis L. Scarce in meadow^s. 
Medicago. 
453. M. sativa L. Plenty; escaped and thriving. 
Melilotus. 
454. M. allta Desv. Very abundant along roadside, a very trouble- 
some plant. Has overrun the country within the last few 
years. 
455. M. officinaUs (L.) Lam. Scarce but spreading. 
Trifolium. ’ ' 
456. T. aureum Poll. Scarce in dry soil. {T. agrarium L. In part.) 
457. T. procumljens L. Rather scarce. 
458. T. pratense L. Abundant. 
459. T. hyhridum L. Abundant in fields and meadows. 
460. T. repens L. Abundant in fields and meadows. 
Psoralea. 
461. P. argophylla Pursh. Abundant on prairies. 
462. P. esculenta Pursh. Plenty on prairies. 
Amoepha. 
463. A, canescens Pursh. Abundant on prairies. 
464. A. fruticosa L. Common along streams. 
465. A. nana Nutt. Nearly extinct, formerly common on prairies. ' 
