296 XLVII. SAXIFRAGACE^E [Deutzia 



Oeder XLVII. SAXIFRAGACE^. Gen. PI. i. 629. 



Trees, shrubs or herbs, fl. regular, generally bisexual. Calyx free or adnate 

 to ovary. Stamens free, as many as petals or double their number, rarely more. 

 Carpels 2 or more, usually connate into a 1- or 2-celled ovary, ovules numerous, 

 placentae on the edge of carpels, parietal or on the dissepiment. Seeds small, 

 embryo minute, in copious fleshy or horny albumen. 



A. Leaves opposite. 



Filaments winged, stamens 10 1. Deutzia. 



Filaments linear or subulate. 



Stamens 2-40 Phii.adeli'hus (p. 296). 



Stamens 8-12. 



Petals falling off as a cap, style one, short . Pileostegia (p. 296). 

 Petals sometimes falling off as a cap. styles 2—4, 

 calyx-segments of sterile fl. enlarged in fr. . 2. Hydrangea. 

 Petals free, berry inferior, blue. . . .3. Dichroa 

 • Stamens 4, fr. fleshy 1-seeded . . . .4. Polyosma 



B. Leaves alternate. 



Ovary nearly free, of 2 carpels, capsule 2-valved . 5. Itea. 



Ovary nearly free, of 3 carpels, capsule 3-valved . Pottixgeria (p. 299). 



Ovary inferior, fr. a berry 6. Ribes. 



1. DEUTZIA, Thunb. ; Fl. Brit. Ind. ii. 406. - 



Shrubs, 1. and branches opposite, hairs stellate. Leaves serrate, stipules 0. 

 Fl. white, corymbose, pentamerous, stamens 10, filaments broadly winged. Ovary 

 inferior, 3-5-celled, ovules oo on 3-5 axile placentas in the inner angle of the 

 cells, styles 3-5, filiform. Capsule septicidally dehiscent, separating into 3-5 

 distinct cocci. Species 10. Himalaya, China, Japan, North- and hills of 

 Central- America. 



1. D. corymbosa, Rob. Brown: Boyle 111. t. 46 (Bhujhi, Philru, Bash.). Himalaya 

 6-10,000 ft., Kashmir to Bhutan. Tibet. A shrub attaining 8 ft., bark peeling off in 

 long thin shining rolls, leaves green beneath. Calyx-teeth ovate, shorter, when in fl., 

 than tube, petals broad, obovate, nearlv glabrous, imbricate, J in. long. 2. D. staminea, 

 Bob. Brown in Wall. PI. As. Ear. t. 191 ; Collett Simla Flora, fig. 52 (Deosu, Bash.). 

 Himalaya 4-9,000 ft., Hazara to Bhutan. Naga hills and Manipur (D. intermedia, 

 Watt MSS.). Usually smaller than 1, bark dark grey, peeling off in thin longitudinal 

 strips,branehlets,innoreseence and leaves rough with harsh stellate hairs. Calyx-teeth 

 triangular, oblong or linear, when in fl. as long as tube, petals oblong, induplicate- 

 valvate, J in. long. 3. D. macrantha, Hook. f. & Thorns. Below Binsar in Kumaon, 

 5,500 ft., 1. distantly serrate, calyx-teeth linear, longer than tube while in fl., petals 

 lanceolate, § in. long, induplicate-valvate in bud. 



Philadelphus coronarius, Linn. Himalaya, Kashmir to Bhutan, 5-9,000 ft. (Da&ya, Bash.). 

 A shrub, bark light grey, fl. white, fragrant, usually tetramerous, axillary or in small 

 cymes at the ends of branchlets. Petals convolute in bud, J in. long, stamens 20-40, 

 filaments subulate, ovary 4-celled, ovules oo on 4 placentas protruding into the cell from 

 the inner angle. Capsule dehiscing loculicidally. 



Pileostegia vibumoides, Hook. f. & Thorns. ; Khasi hills. China. A glabrous shrub, 

 branches decussate, 1. coriaceous evergreen, entire. Fl. small, white, in large terminal 

 panicles, petals 4 oro, falling off as a cap, ovary inferior, 4-6-celled, ovules oo. Styles 

 short, surmounted by a thicker pyramid, the 4-6 angles of which are stigmatic. 

 Capsule 4-5-celled. 



2. HYDRANGEA, Linn. ; Fl. Brit. Ind. ii. 403. 



Shrubs or trees, often climbing, 1. opposite, stipules 0. Fl. in terminal 

 corymbs, bracts deciduous, the outer fl. often sterile and larger than the fertile 

 inner fl. Calyx-tube adnate to ovary, limb4-5-dentate, petals valvate, stamens 



