OiiDEii 45. SAXIFRAGACE.E. 113 



I. SAXIFR^GE.E. Herbs. Stipules uone or aduate. Petals imbricate, rarely 

 convolute in the bud. Calyx free or partly adherent., .(a) 



Petals wanting. Ovary adherent, 1-celled. Stamens 10 CHRYSOSPLBNIUM. 1 



a Petals pinnatifid. Ovary half adherent, 1-celled. Stamens 5 or 10 MK.SLLA. 2 



Petals entire. d Stam. 10. e Ovary 1-celled, nearly free TIARELLA. 3 



Ovary 2-celled. Fls. perfect. Lvs. simple SAXIKKAGA. 4 



Ovary 2-celled. Fls. polyg. Lvs. compound... ASTILBK. 5 



d Stam. 5. / Ovary 2-celled, adherent. Seed rough BOTKINI A. 6 



/ Ovary 2-celled, free. Seed wing-margined SULLIVANTIA. 7 



/ Ovary 1-celled. </ Styles and carpels 2 HKUCHKRA. 8 



g Styles and carpels S LEPUROPETALOX. 9 



<j Stigmas and carpels 4 PAKNASSIA. 10 



H ESCALLONIE^. Shrubs with alternate leaves, no stipules, and a valvate corolla bud. . .(!>) 



b Calyx free from the 2-celled ovary. Stamens 5. Capsule OO -seeded ITEA. 11 



b Calyx adherent to the ovary. Stam. 5. Berry 00 -seeded. (From S. Am.) ESCALLONIA. 12 



HI. HYDRANGEA. Shrubs with opposite, simple leaves, and no stipules. . .(c) 



c Corolla valvate in the bud. h Cymes radiate. Shrub erect HYDRANGEA. 13 



h Cymes naked. Shrub climbing DECUMARIA. 14 



c Corolla convolute in the bud. 7; Stamens 20 40 Petals 4 PHILADELPHCS. 15 



Is Stamens 10. Petals 5. (Asiatic) DEUTZIA. 16 



IV. RIBESIE^E. Shrubs with alternate, palmately-lobed leaves, and baccate fr...RiBES. 17 



1. CHRYSOSPLENIUM. Tourn. WATER CARPET. Calyx adnate 

 to the ovary, 4-5-lobed, colored inside. Cor. 0. Sta. 8 10, short. Sty. 2. 

 Caps, obcordate, 1-celled, 2-valved, many-seeded, x? Prostrate, small. 



C. Americanum Schw. Lvs. opposite, roundish, slightly crenate, tapering to the 

 petiole ; cal. 4-cleft. Cool springs, Northward. 3 6'. Calyx yellowish. Apr. May. 



2. MITELLA, Tourn. MITRE-WORT. Calyx 5-cleft, adherent to the 

 base of the ovary. Pet. 5, pectinately pinnatilid, inserted on the throat of 

 the calyx. Sta. 5 or 10, included. Sty. 2, short. Caps. 2-beaked, 1-celled, 

 with two equal valves. 1| Flowers small, in a slender raceme or spike. 



1 M. dipli^lla L. Lvs. cordate, acute, eublobate, serrate-dentate, radical ones on 



long petioles, the cauliue 2, opposite, subsessile ; fls. white, in a long, loose spike. 

 Woods, N. Eng. to Car. If. May, June. Curious. 



2 T9K nutla L. Lvs. orbicular-reniform, doubly crenate, with scattered hairs above ; 



scape filiform, few-flwd., naked or with a single leaf; pet. pinnatitid. with filiform 

 segments. Damp woods, N. Eng. N. Y. : rare. 6'. Very delicate. June. 



3. TIARELLA, L. BISHOP'S CAP. Calyx 5-parted, the lobes obtuse. 

 Pet. 5, entire, the claws inserted on the calyx. Sta. 10, cxserted, inserted 

 into the calyx. Sty. 2. Caps. 1-celled, 2-valved, one valve much larger. 

 U Flowers white. 



T. cordifolia L. Lvs. cordate, acutely lobed, mucronate-dentate, pilous ; scape ra- 

 cemous ; stolons creeping. Rocky woods, Can. to Ga. Common North. If. 



4. SAXIFRAGA, L. SAXIFRAGE. Sep. 5, more or less united, often 

 adnate to the base of the ovary. Pet. 5, entire, inserted on the tube of the 

 calyx. Sta. 10. Anth. 2-celled, with longitudinal dehiscence. Caps, of 

 2 connate carpels, opening between the 2 diverging, acuminate beaks 

 (styles). Seeds GO. if 



| Leaves opposite (small) on the prostrate stem. Flowers purplish No. 1 



{ Leaves alternate on the ascending stem. Flowers yellow or white Noa. 2, 3, 4 



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



