206 RIBESACEJE. PHILLADELPHUS. 



WHIPPLKA. 



the ovary nearly or quite to the summit, the limb 4-5-parted T 

 valvate in the bud, persistent. Petals 4-5, large, convolute in 

 the bud. Stamens 20-40, shorter than th3 petals. Styles 3-5, 

 usually 4, united sometimes nearly to the summit : stigmas ob- 

 long or linear. Capsule mostly 4-celled, free at the summit ; 4- 

 valved, loculicidal, the placentae projecting into the cells, many- 

 seeded. Seeds pendulous and densely imbricated downward on 

 the thickened placenta?, with a loose coat, usually prolonged at 

 both ends or fimbriate at the hilum. 



P. Lewisii Pursh Fl. 329. Shrub 3-12 feet high : leaves broadly lance- 

 olate, entire or serrate, acute, more or less pubescent both sides: flowers 

 in small cymes at the ends of the branchlets; lobes of the calyx acute, 

 twice the length of the tube : petals white, oblong-ovate, 6-10 lines long ; 

 filaments unequal the longer ones about half as long as the petals ; styles 

 about equalling the shorter stamens, deeply 2-4-cleft. Common in open 

 woods and rocky hillsides, Brit. Columbia to California. 



2 WHIPPLE1 Torr. Pac. R. Rep. iv, 90, t. 7. 



Small diffuse shrubs with opposite simple leaves and small 

 white flowers in cymous clusters on terminal naked peduncle?. 

 Calyx 5-cleft, the tube coherent with the lower part of the ovary, 

 the lobes thin and petal-like. Petals 5. Stamens 10, rarely more 

 or less ; anthers short, 2 -celled. Ovary 3-5-celled with a single 

 suspended ovule in each cell; styles distinct ; stigmas introrse. 

 Capsule septicidally dehiscent into 35* cartilaginous 1-seeded 

 closed valves which open down the ventral suture only. Seeds 

 oblong with a closed coat. 



W. motlesta Torr. 1. c. Stems slender, spreading or trailing, rooting 

 at the nodes, 1-2 feet long or more : leaves ovate or oval, obtusely few- 

 toothed or entire, somewhat 3-ribbed, 8-12 lines long, tapering below to a 

 short petiole, acute or acutish, pubescent both sides: flowers white, few, in 

 in a close cyme at the end of a rather long slender peduncle hardly 2 lines 

 broad; calyx campanulate, the white oblong lobes longer than the tube; 

 petals white, with a lanceolate blade and broad claw, longer than the 

 calyx-lobes : capsule globose : styles at length deciduous: seeds oblong. In 

 open woods, from near the Columbia river to California. 



Order XXXII. PvEBESACE^C. 



Spiny or smooth shrubs with alternate often fascicled pal- 

 mately veined leaves without stipules, and few to numerous, 

 mostly perfect, flowers in racemes, either produced from the 

 bud with the leaves and terminating the very short axillary 

 branchlets, or sometimes leafless buds. Calyx campanulate or 

 tubular, colored, the tube adherent to the ovary, the limb 4-5- 

 cleft, with mostly equal segments, marcescent, imbricate in 

 the bud. Petals distinct, equal in number to the segments of 

 the calyx and alternate with them, inserte I in the throat of the 

 calyx. Stamens as many as petals and inserted alternately 

 with them: anthers introrse. Ovary 1-celle-l with two parietal 

 placentae: ovules numerous, or sometimes few; styles 2, rarely 



