3Y0 Oedse 61.— SAXIPKAGACEiE. 



1 M, diph^Ua L. Lvs. cordate, acuto, sublobate, serrate-dentate, radical ones 

 on long petioles, the caulme 2, opposite, subsessile. — ^Very common in the woods 

 of N. Eng. to Can. and Ky. St. a foot or more high, bearing the pair of leaves 

 near the midst. Lvs. 1 to 3' long, nearly as wide, hairy, on the hispid petioles 

 2 to 6' long. Ms. on short pedicels, arranged in a long, thin spike or raceme, 



. and most beautifully distinguished by the finely divided white petala Seeds 

 black and shining. May — Jn. Fig. 298. 



2 M. ntlda L. Lvs. orbicular-reniform, doubly crenate, with scattered hairs 

 above ; scape filiform, few-flowered, Tiaked or with a single leaf; pet. pinnatifld 

 with fiUform segments. — A very delicate species, growing in damp, rich, shady 

 woodlands, Potsdam, N. T., and in northern N. Eng. Lvs. and sta. light green, 

 peUuoid. Soape 4 to 6' high, terminating in a thin raceme of white fls. with 

 finely pinnatifid petals. They are erect or prostrate and send out creeping sto- 

 lons fi-om the base. Lvs. J' long and of nearly the same width. Jn. 



3. TIAREL'LA, L. Bishop's Cap. (Lat. tiara, a mitre or some 

 other head dress ; from the resemblance of the capsule.) Calyx 5- 

 parted, the lobes obtuse ; petals 5, entire, the claws inserted on the 

 calyx ; stamens 10, exserted, inserted into the calyx ; styles 2 ; cap- 

 sule 1-celled, 2-valved, one valve much larger. — 'H Fls. white. 



T. cordifdlia L. Lvs. cordate, acutely lobed, mucronate-dentate, pilous ; soape 

 racemous ; stolons.creeping. — Rooky woods, Can. to Macon, Ga. and Eufala, Ala. 

 Common in N. Eng. and generally associated with Mitella diphyUa, which plant, 

 in its general aspect, it much resembles. The scape arises from a creeping root- 

 stock 10 to 20' high, often bearing a bract Lvs. 2 to 3' long, 4 as wide, hairy, 

 and on hairy petioles 4 to 6' long. Rao. 1 to 2 J' long ; fls. wholly white, with 

 minute bractlets. May, Jn. 



4. SAXIF'RAGA, L. Saxifrage. (Lat. saxum, a vock, frangere, to 

 break; often growing in the clefts of rocks.) Sepals 5, more or less 

 United, often adnate to the base of the ovary ; petals 5, entire, inserted 

 on the tube of the calyx; stamens 10; anthers 2-celled, with longi- 

 tudinal dehiscence ; capsule of 2 connate carpels, opening between the 

 2 diverging, acuminate beaks (styles) ; seeds oo. — li 



§ Leaves opposite (small) on tlie prostrate stem. Tls. purplish No. 1 



§ Leaves alternate on tlio .ascending stem. Fls. yellow or white Nos. 2, 8, 4 



^ Leaves rosul.ite at the base of the mostly leafless scape, (a) 



a Oaly.x entirely free from the ovary (inferior) Nos. 6, 6, 7 



a Calyx adherent to the base of the ovary (half superior) Nos. 8, 9,10 



1 S. oppositifdlia L. Lvs. opposite, rather crowded, obovate, carinate, ciliate, 

 obtuse, punctate, persistent ; fls. solitary ; cal. free from the ova. ; pet. large, ob- 

 ovate, .5-veined, longer than the stam. — In the same locahty as the next species. 

 Sts. purplish, very branching, diffuse. Lvs. bluish-green, 1 to 2" long. Fls. 

 light purple, large and showy. May, Jn. ? 



2 S. aizoides L. Casspitous, leafy; hs. linear-obhng, more or less ciliate, thick, 

 flat, mostly persistent ; flowering sts. annual; fls. paniculate, sometimes solitary;, 

 sop. ovate, slightly coher.ent with the ova ; pet. oblong, longer than the sep. ; 

 stig. depressed ; caps rather thick, as long as the styles. — In the clefts of rocks, 

 at Willoughby Lake, Vt. (500 feet above the water), N. to the Arc. Sea, Bar- 

 ren stems short, with densely crowded lvs. ; flowering stems ascending, 2 to i'- 

 long, with scattered lvs. Lvs. 4 to 6" long, about 2" wide. Pedicels bracteate. 

 Pis. yellow, dotted. 



3 S. rivuldris L. St. weak, ascending, 3 to 5-flowered; radical lvs. petioMe, 

 reniform, crenately lobed, cauUne, lanceolate, subentire; cal. lobes broad-ovate, 

 nearly as long as the ovate petals, but much shorter than the short-beaked cap- 

 sule.— White Mts. N. H. (Oakes), N. to Arc. Am. A very small species, with 

 white, bracteate fls. Sts. about 2' high, annual, with alternate lvs. 



4 S. triouspidata Retz. St. thick, erect; lowerlvs. crowded, oblong, Z-ctt^pidate; 

 fls. few, large, somewhat oorymbed ; sop. thick, ovate, shorter than the obloiig- 



