ORDER 61. SAXIFRAGES. 21? 



P. grandiflo'rns. Large-flowered Ryringa. A very showy sh/'.'b, 6f. high. Leaves 

 ovate, acuminate, 3-veined. Stigmas 4, styles united into 1. Flowers large, in 

 umbels of 2-7, white nearly inodorous. Cultivated, but wild at the South. June. 



P. eorona'rius. Mock Orange. Stems 5-8f. high. Leaves oval and ovate, short- 

 pointed, feather-veined. Styles and stigmas 4, distinct. Flowers numeroj.i, 

 white, handsome, very fragrant. Cultivated. June. 



*. HYDRAN'GEA. Hydrangea. 



Flowers in cymes, the marginal ones generally barren, with the sepals 

 much enlarged (that is, the cymes are radiant). The fertile flowers are 

 small, calyx about 4-toothed, petals 4, stamens 8 or 10; capsule 2-beaked. 

 many-seeded. 



1 H. arbores'cens. Big Wild H. Leaves ovate, obtuse or cordate at base, nearly 



smooth. Cymes flat. Shrub 4 to 6 feet high. M. W. Cultivated. 



2 H. quercifo'lia. Oak-leaved H. Leaves deeply sinnate-lobed. Cymes in the form 



of a panicle. South. Cultivated. (See Fig. 482.) 



3 H. radia'ta. Silver-leaned H. Leaves ovate, clothed with a silvery-white down 



beneath. Cymes flat. Shrub 6-8f. high. S. t 



4 H. horten'sis. Changeable II. Leaves elliptical, narrowed at each end, smooth. 



Cymes mostly all barren, changing from green to white, pink, blue, &c, 



5. SAXIF'RAGA. Saxifrage. 



Calyx 5-cleft, either free, or adherent to the base of the ovary. Petals 

 5, entire. Stamens 10. Styles 2. Pod 2-celled, 2-beaked, opening between 

 the beaks, many-seeded. 



Leaves opposite (small) on the prostrate stem. Flower? purplish No. 1. ' 



Leaves alternate on the ascending ptem. Flowers yellow or white NOB. 2-4. 



Leaves rosulate at the base of the mostly leafless scape.... (a) 

 a Calyx entirely free from the ovary (inferior). . . .Nos. 5-7. 

 a Calyx adherent to the base of the ovary (half superior).... Nos. 8-10. 

 1 S. oppositifo'lia. A small plant with large fls. Cliffs, Willoughby L., Vt. and N. 



2 S. aizoi'des. Petals yellow, spotted. Lvs. narrow. Wyth No. 1, and West. 



3 S. rivula'ris. Petals white. Root leaves renif orm. White Mts. and North. 



4 S. tricuspida'ta. Petals yellow, dotted. Lvs>. S-cu^ped at apex. L.Superior. 



5 S. erosa, and two other species, on Mts. Penn. and S. (See Botanist and Flor.) 



8 S. Aizo'on. Leaves evergreen, thick, spatulate, bordered with white teeth. Petals 



obovate, cream-white. Rocks, \J"illonghby Mt., and W. 



9 S. Virginien'sis. Early Saxifrage. Lvs. oval-spatulate with a broad petiole. Scape 



par.icled, 4-12' high. Petals white, oblong, much longer than the calyx. Flowers 

 many, in April and May. Grows on rocks, common. 



10 S. Pennsrlva'nica. Swamp S. Leaves lance-oblong, acntisb, narrowed to a short 



stalk. Scape l-2f., branching into a diffuse panicle of small, greenish homely 

 flowers. Petals narrow, scarce longer than the reflexed iepale. Swamps. 

 10 



