IOWA ACADEMY OP SCIENCES 
45 
GERANIACEAE. 
OESANroM* 
494. G. maculatum L. Scarce, formerly plenty in woods. 
495. G. rotundifoUum L. Rare. Very rare in Iowa. 
OXALIDACEAE. 
Gxalis. 
496. 0. violacea L. Abundant. Often with white flowers. 
497. 0. stricta L. Abundant everywhere. 
498. 0. cymosa Small. Scarce in woods. 
LINACEAE. 
lANUM. 
499. L. usitatissimum L. Sparingly escaped from cultivation. 
500. L. sulcatum Riddell. Common on prairies. 
RUTACEAE. 
Xanthoxylum. 
501. X americanum Mill. Abundant in woods. 
Ptelea. 
502. P. trifoliata L. Plenty in woods. 
POLYGALACEAE. 
POLYGALA. 
503. P. verticillata L. Common in meadows. 
504. P. viridescens L. Scarce in meadows, 
505. P. senega L. Scarce in rocky woods. 
euphorbia ceae. 
Acalypha. 
506. A. virginica L. Abundant in woods. 
Euphorbia. 
507. E. serpyllifolia Pers. Scarce. 
508. E. glyptosperma Engelm. Scarce. 
509. E. nutans Lag. 
510. E. corollata L. Abundant on prairies. 
511. E. maculata L. Abundant in fields and gardens. 
512. E. dentata Michx. Scarce in waste places. 
513. E. heterophylla L. Common in waste places. 
514. E, oMusata Pursh. Scarce in dry soil. 
515. E. missouriensis (Norton) Small. Scarce in sandy soil. 
(E. dicliotosperma of Britton and Brown’s Illustrated Flora, 
but not of P. & M.) 
616. E. cyparissias L. Common; escaped from gardens. 
