62 
IOWA ACADEMY OF SCIENCE 
SAXIFRAGACEAE. 
SAXIFRAGA (Tourn) L. 
467. 
468. 
469. 
470. 
471. 
472. 
473. 
Saxifraga pennsylvanica L. Swamp Saxifrage. Not rare in moist 
woodlands. 
HEUCHERA L. 
Heuchera 'hispida Pursh. Hairy Alum-root. Common in high 
gravelly soils. 
MITELLA (Tourn) L. 
Mitella diphylla L. Mitrewort. Common in rich moist wood- 
lands. 
RIBES L. 
Ribes cynosbati L. Prickly Gooseberry. Common in woods. 
Ribes gracile Michx. Missouri Gooseberry. Common in woods. 
Ribes oxyacanthoides L. Smooth Gooseberry. Not uncommon 
in woodlands. 
Ribes floridum L’Her. Wild Black Currant. Rather scarce in 
woodlands. 
PLATANACEAE. 
PL AT ANUS (Tourn) L. 
. 474. Platanus occidentalis L. Sycamore. Common especially in low 
woods. 
ROSACEAE. 
PHYSOCARPUS Max. 
475. Physocarpus opulifolius (L.) Max. Nine-bark. Locally plenty 
along streams. 
476. Physocarpus opidifolius Var. intermedins (Ryd.) Rob. Nine- 
bark. Rare; Cedar Township. 
SPIRAEA (Tourn) L. 
477. Spiraea saiicifolia L. Meadow Sweet. Not uncommon in low 
meadows. 
PYRUS (Tourn) L. 
478. Pyrus ioensis (Wood) Bailey. Western Wild Crab. Common 
in woods and thickets. 
