SAXIFRAGES. 137 



11. R. cynosbati Jacq. : subaxillary spines in pairs ; leaves with short 

 lobes, incisely toothed, softly pubescent ; racemes nodding, few-flower- 

 ed ; calyx erect-campanulate ; berries prickly. 



HAB. Mountains. N. H. andPenn. April, June. 1>. Racemes 

 few-flowered. Calyx white. Petals very small. Berry cover- 

 ed with long prickles. Prickly Gooseberry. 



ORDER LVII. SAXIFRAGES. De Cand. Lind. 



Calyx either superior or inferior, 4 5-cleft. Petals 6, or 

 none, inserted between the lobes of the calyx. Stamens 5 10, 

 inserted either into the calyx, or beneath the ovary. Disk either 

 hypogynous or perigynous. Ovary inferior, or nearly supe- 

 rior, usually consisting of two carpels, 1 or 2-celled, rarely 4 

 or 5-celled. Styles none. Stigmas sessile on the tips of the 

 lobes of the ovary. Fruit a capsule or berry, with numerous 

 minute seeds. E?nbryo taper in the axis of a fleshy albumen. 



Herbs. Leaves simple, alternate, without stipules. 



1. HYDRANGEA. Linn. 



Calyx hemispheric, adnate to the germ, 5-toothed. Petals 

 5, regular. Stamens 10. Styles 2, distinct. Capsule 2- 

 celled, crowned by the styles and teeth of the calyx, opening 

 by a foramen between the styles. (Placed under Caprifolia- 

 cea by Lindley.) Decandria. Digynia. 



1. H. vulgaris Mich. : leaves oblong-ovate, acuminate, dentate, ob- 

 tuse at base, smooth beneath ; flowers in terminal naked cymes. H. 

 arlorescens Linn. 



HAB. Rocky situations. Penn. Pursh. July. T>. Shrub 

 4 6 feet high. Flowers white. 



2. H. radiata Walt. : leaves cordate, ovate, acuminate, serrate, to- 

 mentose and white beneath ; cymes terminal, radiate. -H. nivea Mich. 



HAB. Penn. to Geor. Muhl July. T?. Shrub 6 feet high. 

 Floicers white, very ornamental. Hydrangea. 



2. SAXIFRAGA. Linn. 



Calyx 5-parted. Petals 5, entire, with short claws. Sta- 

 mens 10. Capsule with2-beaks, 2 celled, many-seeded, open- 

 ing between the beaks. Decandria. Digynia. 



1. & virginiensis Mich. : pubescent ; stem nearly leafless, corym- 

 bose-paniculate ; leaves oval, obtuse, crenate, narrowed at the base into, 

 a petiole ; flowers subsessile ; petals oval, much larger than the calyx ; 

 capsule half inferior. & vernalis Big. & nivalis Muhl. 



12* 



