Order 61.— SAXIFRAGES. 217 



P. grandiflo'rus. Large-flowered Syringa. A very sliowy shrub, 6f. hi^h. 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. corona'rius. Mock Orange. Stems 5-8f. high. Leaves oval and ovate, short- 

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

 white, handsome, very fragrant. Cultivated. June. 



4. 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 arc 

 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 i=^/^. 4S2.) 

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



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

 4 H. horten'sis. Changeable H. 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. Flowers purplish — No. 1. 



§ Leaves alternate on the ascending etem. Flowers j'ellow or white Nos. 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. oppositjfo'lia. A small plant with large fls. Cliffs, Willoughby L., Yt. and N. 



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



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



4 S. tricuspida'ta. Petals yellow, dotted. Lvs. 3-c?/c<f/)ecf at apex. L.Superior. 



:^ S. erosa. and two other species, on Mts. Penn. and S. (See Botanist andFlor.) 



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



obovate, cream-white. Rocks, Willoughby Mt., and W. 



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



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

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



10 S. Pennsylva'nica. Swamp S. Leaves lance-oblong, acutish, 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 eepalt". Swamps. 



10 



