IOWA ACADEMY OF SCIENCE 
63 
AMELANCHIER Medic. 
479. Amelanchier canadensis (L.) Medic. Service Berry or June 
Berry. Common on high banks. 
480. Amelanchier botryapium (L. f.) T. & G. Shad-bush. Locally 
plenty. 
CRATAEGUS L. 
481. Crataegus crusgalli L. Cockspur Thorn. Very common in 
woods. 
482. Crataegus punctata Jacq. Large-fruited Thorn. Abundant in 
woods’ and thickets. 
483. Crataegus coccinea L. Rough Thorn. Less common but not 
scarce. 
484. Crataegus rotundifolia Moench. Glandular Thorn. Rare; State 
Quarries. 
485. Crataegus macrosperma Ashe. Large-seeded Thorn. Scarce in 
low rich woods. Hills Siding. 
486. Crataegus pruinosa (Wendl.) C. Koch. Pruinose Thorn. Com- 
mon in woods and thickets. 
487. Crataegus mollis (T. & G.) Scheele. Red Fruited Thorn. Com- 
mon in woods and thickets. 
488. Crataegus macracantha Lodd. Long Spined Thorn. Scarce in 
woods. 
489. Crataegus tomentosa L. Pear Thorn. Rare in rocky places. 
FRAGRARIA (Tourn) L. 
490. F rag r aria virginiana Yar. illinoensis (Prince) Gray. Wild 
Strawberry. Very abundant. 
491. Fragraria vesca Yar. americana Porter. Wood Strawberry. Not 
rare in woodlands. 
POTENTILLA L. 
492. Potentilla arguta Pursh. Glandular Cinquefoil. Common in 
rocky and gravelly soils. 
493. Potentilla monspeliensis L, Rough Cinquefoil. Common in 
waste places. 
494. Potentilla rivalis Nutt. Yar. millegrana (Engelm.) Wats. Dif- 
fuse Cinquefoil. Scarce in moist places. 
495. Potentilla canadensis L. Five Finger. Common. 
