Saxifrage Family. 51 



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

 euminate. base truncate or subcordate, thin, 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 C. mollis 

 (T. & G. ) Sheele. 



AMELANCHIER Medic. Small trees or shrubs, with simple alternate pet- 

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

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

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

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

 * Leaves usually serrate all around. 



A. cancdensis ( L.) Medic. June-berry. Service-berry. A small tree, usual- 

 ly 1 0—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 to linear-spatulate. .'5-4 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. ohbmgifolia 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 W T inneshiek county. 



SAXIFRAGACEAE Dumort. 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. 

 Saxifr*ga. Flowers perfect: stamens 10; ovary 2-celled. 



Sullivantia. Flowers perfect : stamens 5; ovary 2-celled; seeds wing- margined. 

 Mitklla. Calyx adnate to the base of the 1 -celled ovary ; petals pinnatifid; stamens 10. 

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



5 : carpels 2. 

 Chrysospi.es tor. Petals wanting: stamens 10; styles 2. 

 Parsassia. 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. 



SAXIFRAGA 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; anther 

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



