SAXIFUAGAC^. 99 



nchmg from the base. Flowers large for the size of tlic plant. Calyx per- 

 nt ; segments ovate. Pitals scalc-hke, ovate. Capsule 3-valvcJ at the 

 ■;\i::v". 



U hite. G. March— April. Close soils. 1 inch. 



Genus VII HYDRANGEA. 



Crt?vJ 5-toothed. F/ofrer* fertile, or sterile ; calyx of the 

 sterile flowers membranaceous, colored, tlat, dilated ; the re- 

 maininii organs riidimeiitarv, or none: tube of the calyx in 

 fertile flowers, hemispherical, cohering to the ovary, ribbed. 

 Petals 5, ovate, sessile. Stamens double the number of the 

 petals. Sti/les 2. Capsule 2-celled, dehiscing by an aper- 

 ture between the styles. Seeds numerous. Shrubs with op- 

 posite leaves, with cymose flowers. 



1. H. Arborescens. "S/^/n with opposite branches, pubescent when young. 

 Ijcaves obioiig-ovatc, acuminate, dentate, nearly glabrous. Flowers in fasti- 

 giate cvmcs, generally tertile. 



While, h- May — June. Mountains. S-8 feet. 



2. H. C'^RPATA. Resembling the precedinfj species. i>at)C» broad-ovate , 

 slightly corilnte at the base, acuminate, coarsely toothed, glabrous underneath. 

 Flovcers generally in radiate cymes. 



White. ^1- May — June. Mountains. 6-8 feet. 



3. H. NivEA. Leaves ovate, cordate, acuminate, serrate, pubescent along 

 the veins on the upper surface, silvery, tomentose beneath. Flowers in ter- 

 minal radiate cymes, with few sterile tiorets in the circumference; by culti- 

 vation all liecome sterile. 



White, h' May— June. Upper Car. & Ga. Near Greenville. 6-8 ft. 



4. H. QuERciFoi.iA. A showy shrub. Leaves deeply 3-5 lobed, serrate, 

 tomentose beneath. Flowers in paniculate, radiate cymes, sterile flowers 

 large, numerous. 



White, becoming purple, b^ May— June. Middle Ga. Common on 

 the banks of the Ocmulgee and Flint rivers. 



Gents VIII. DECUMARIA. 



Calyx 8-12 cleft, tube campanulate,,ad'iering to the ovary 

 Petals 8-12, narrow, oblong, with margins somewhat indu- 

 plicate. Stamens 3 times the number of the petals. Capsule 

 5-lO.celled, ribbed, opening between the rii)S ; placentae cen- 

 tral. Seeds numerous. A shrub with opposite leaves. Floio- 

 ers in compound cymes, fragrant. 



1. D. Barbara. Stem climbing by rootlest large trees. Leaves broadly 

 c ate, acute at eacn end, or obtuse at the base. Flowers in 



Cu- . _ icS. 



White, h- July- In middle Georgia. 20-40 feet. 

 Gents IX. PHILADELPHUS. 



Calyx 4-5.parted, j>ersistent, tube adhering to the ovary. 

 Petals 4-5, broadly obovate. Stamens numerous. Styles 4, 



'TP 



