Order 61.— SAXIFRAGACE^. ggp 



acute at, each end, unequally serrate ; fla. in unilateral cymoua racemes. — A 

 hardy plant of little beauty, in moist situations, Can. and U. S. St. 10 to 16' 

 high, with a few short branches. Lvs. 2 to 3' by J to 1', membranous, smooth 

 sharply and unequally serrate. Eac. several, recurved at first, at length spread- 

 ing, with the flowers arranged on their upper side, constituting a corymboua, 

 scentless, pale, yellowish green cyme. Petals generally wanting. Jl. — Sept. 



Order LXL SAXIFRAGACE^. Saxifrages. 



Herhs or shrubs. Lvs. alternate or opposite, sometimes stipulate. Sepals 4: or 5, 

 cohering more or less, and partly or wholly adherent. Petals as many aa the sepals, 

 inserted between the lobes of the calyx. Stamens as many as the petals and al- 

 ternate with them, or 2 to 10 times as many. Ovary inferior, usually of 2 carpels, 

 cohering at base, distinct and divergent above. Fruit generally capsular, 1 to 2- 

 celled. Seeds small, many, albuminous, (Figs. 270, 298, 310, 393.) 



Genera 42, species 640, subdivided into four groups ns given below. They are distributed in 

 both heiriisphercs as follows. The Saxitrasjeic beloriK to the northern find alpine regions. The 

 Eseallonieiu to the nlpine regions of S. America. The Philadtlpheie to the north Temperaw 

 Zone, and tlie Cnnoniufle to the E. Indies, Australia and S. America, Many are cultivated for 

 their great beauty. Their properties are generally astringent. 



SUBORDERS AND GENERA. 

 I. SAXIFRAGES. Herbs. Stipules none or adnate. Petals imbiicate, rai'ely convolute in 

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



a Petals wanting. Ovary adherent, 1-celled. Stamens 10 ...Chrysosplenium. 1 



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



a Petals entire.— Stamens 10. — Ovary l-celled, nearly free Tiarblla. 3 



— Ovary 2-celled. FIs. perfect. Lvs. simple. ..Saxifraga. 4 

 —Ovary 2-celIed. FIs. polygamous. Lvs. comp..,A6TiLBB. 5 



— Stamens 5. — Ovary 2-cellcd, adherent. Seed rough Boykinia. 6 



— Ovary 2-celled, free. Seed wing-margined.. Sullivaktia. 7 



— Ovary 1-celled. — Styles and carpels 2 Heucueea. 8 



— Styles and carpels 3. . . .Lepueopetalon. 9 

 II. ESCALLONIES. Sfirubs with alternate Z«s., no stipules and a valvate corolla bud. (b) 



b Calyx free from the 2-celled ovary. Stamens 5. Capsule oo -seeded Itea. 10 



b Calyx adherent to the ovary. Stam. 5. Ber. OO -seeded. (From S. Am.)..EscALLOKiA. lil 

 III. HYDRANGEA. Sliruha witJi opposite, simple leaves and no stipules, (c) 



C Corolla valvate In the bud. — Cymes radiate. Shrub erect Hydrangea. 12 



—Cymes naked. Shrub climbing Decumaeia. 13 



C Corolla convolute in the bud.— Stamens 20 to 40. Petals 4 PiiiLADELPnuB. 14 



-Stamens 10. Petals 5. (Asiatic) Deutzia. 15 



1. CHRYSOSPLE^NIUffl, Tourn. Water Carpet. (Gr. XP'-ao?, 

 gold, arrXTjv, the spleen ; on account of the medicinal qualities.) Calyx 

 adnate to the ovary, 4 to 5-lobed, more or less colored inside ; corolla 

 ; stamens 8 to 10, superior, short ; styles 2 ; capsule obcordate, com- 

 pressed, 1-ceIled, 2-valved, many-seeded.— Small aquatic herbs. 



C. AmerioSnum Sohw. Lvs. opposite, roundish, slightly creuate, tapering to 

 the petiole. — A small plant, in springs and streams, spreading upon the muddy 

 surface. St. square, 3 to 6' long, divided in a diohotomous manner at top. Lvs. 

 opposite, i' in length, smooth. Calyx 4-cleft, greenish-yellow, with purple lines. 

 f Corolla 0, stamens 8, very short, with orange-colored anthers, which are the only 

 conspicuous part of the flower. The terminal flower is sometimes decandrous. 

 Apr., May. 



2. MITEL'LA, Tourn. Mitre-wort. (A Lat. diminutive from OT«7ra, 

 a mitre. See Tiarblla.) Calyx 5-cleft, campanulate, adherent to the 

 base of the ovary ; petals 5, pectinately pinnatifid, inserted on the 

 throat of the calyx ; stamens 5 or 10, included ; styles 2, short ; cap- 

 sule 2-beaked, 1-celled, with two equal valves. — V FIs. small, in a slen- 

 der raceme or spike. 



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