Saxifrage Family. 51 



C. coccinea L. Spines stout; leaves ovate or orbicular, apex acute or a- 

 cuminate, base truncate or subcordate, thiti, sharply incised and serrate; flow- 

 ers numerous. Wcods. thickets; April-May, common; Johnson county. The 

 species has been reported from many localities but is confused with V. mollis 

 (T. & G. ) Sheele. 



AMELANCH'ER Medic. Small trees or shrubs, with simple alternate pet- 

 ioled leaves, and white racemose flowers. Calyx 5-cleft, the lobes reflexed, 

 persistent. Petals 5, oblong-spatulate or oblong. Stamens short, many. 

 Styles 5, united below. Fruit a berry like pome, 5-celled, each cell with » 

 false partition, thus apparently 10-celled, and each cell 2-seeded. 



* Leaves usually serrate all around. 



A. canadensis ( L. ) Medic. Jane-berry. Serriee-lnjny. A small tree, usual- 

 ly 10-25 feet high; leaves ovate or oval, acute or acuminate, base rounded or 

 cordate, sharply or finely serrate, sparingly pubescent when young, soon gla- 

 brous; racemes spreading or drooping, pedicels slender, long; petals linear- 

 oblong 1o linear-spatulate, 3-4 times the length of the calyx; pome globose, 

 red or purple, on long slender pedicels. Wooded bluffs; April-May, fruit ripe 

 in July; frequent; Winneshiek, Allamakee, Fayette, Delaware, Johnson, .Sto- 

 ry, and Decatur counties. 



A. botryapium ( L. f.) DC. Usually a small shrub, with leaves and racemes 

 densely white-woolly when young, often glabrous when old; leaves oblong, 

 oval to obovate, acute, base rounded or narrowed, sharply serrate; raceme 

 dense, short; pedicels short; petals spatulate, 2-3 times the length of the ca- 

 lyx-lobes. Wooded bluffs; April-May; infrequent; Fayette and Johnson coun- 

 ties. ( A. canadensis var. ohlonyifolia T. & G. ) 



* * Leaves dentate above the middle. 



A. alnifolia Nutt. A shrub, 3-7 feet high, mostly glabrate, somewhat 

 glaucous; leaves thickish, broadly elliptical to nearly orbicular, obtuse or 

 sometimes truncate at the apex, base rounded or subcordate, coarsely dentate 

 above; raceme short, dense; pedicels short; petals cuneate-oblong. Dry soil; 

 April; infrequent; Winnebago county; reported from Winneshiek county. 



SAXIFRAGACEAE Dwnort. Saxifrage Family. 

 Herbs or shrubs, with alternate or opposite usually exstipulate leaves, 

 and mostly regular flowers. Calyx of 4 or 5 distinct or slightly united 

 sepals. Petals as many as the sepals and alternate with them or none. 

 Stamens 4 or 5, inserted alternately with the petals, or twice the number 

 of the petals. Fruit a capsule or a berry. 



* Herbs; leaves usually alternate. 

 Saxifriga. Flowers perfect ; stamens 10 ; ovary 2-celled. 



SullivANTIA. Flowers perlect : stamens 5 ; ovary 2-celled ; seeds wing- margined. 

 Mitella. Calyx adnate to the base of the 1 -celled ovary ; petals pinnatind; stamens 10. 

 Heucheba. Calyx adnate to the base of the 1 -celled ovary ; petals small, entire ; stamens 



5; carpels 2. 

 ChrysospliEnldm. Petals wanting; stamens 10; styles2. 



Pabnassia. Flowers showy, terminal ; fertile stamens 5, sterile stamens clustered at the 

 base of the petals. 



* Shrubs; leaves opposite. 

 HYDRANGEA. Flowers in compound cymes ; stamens 8 or 10. 

 SAXIpRAGA L. Perennials, with simple leaves, in ours clustered at the 

 root, and perfect flowers. Sepals 5, more or less connivent. Petals 5, entire, 

 inserted on the calyx-tube, imbricated in the bud. Stamens 10; anthers 2- 

 celled. Styles 2. Ovary 2-celled. Capsule 2-celled, 2-beaked. 



