188 CLASS X. ORDER II. 



nectariferous cavity within. Their number is four, and in the 

 terminal one four or five. Inner petals alternating with these, 

 but part of thera usually wanting, lanceolate, acute. Stamens 

 about eight. Germ ovate furrowed, style straight, as long as the 

 germ, stigma peltate, concave. From the base of the germ are 

 horns reversed by pairs into the nectaries. — Woods. — July. 



DIGYNIA. 



194. SCLERANTHUS. 

 ScLERANTHus ANNuus. L. CommoTi Knawcl. 



Calyx of the ripe fruit with sharp, spreading teeth; 

 stems spreading. tSm. 



A small, obscure plant in gravelly soils, road sides, &c. Stems 

 spreading, decumbent, short. Leaves linear, acute, short, oppo- 

 site. Flowers green, sessile, in terminal, leafy clusters. Calyx 

 with five acute, spreading, permanent segments. Stamens from 

 five to ten. — July. — Annual. 



195. SAXIFRAGA. 

 Saxifraga vernalis. Willd. Early Saxifrage. 



Pubescent; leaves oval, somewhat petioled, cre- 

 nate ; flowers erect, panicled, nearly sessile, alternate. 

 Syn. Saxifraga Virginiensis. Mich. 



One of the earliest flowers upon rocks and dry hills. Leaves 

 mostly radical, spreading, fleshy, elliptical, a little pubescent, 

 crenate or serrate, and tapering into a broad petiole. Stem 

 erect, fleshy, hairy, nearly destitute of leaves. Flowers numer- 

 ous, crowded, white, arranged in corymbs on the ends of the 

 branches, which, collectively, form a sort of panicle. — April, 

 May. — Perennial. 



Saxifraga Pennsylvanica. L. Pcnnsylvanian Saxifrage. 

 Leaves oblong-lanceolate, a little hairy, denticulate; 

 stem naked ; peduncles alternate, forming corymbed. 

 heads. Willd. 



A tall, green plant, of little beauty, growing in meadows. 

 Leaves all radical, many times larger than in the preceding 



