p.abnassia. HYDRANGEACiE. 205 



PHILADKLPHUS 



ter on the short caudex, and simple scape-like stems not rarely 

 bearing a small sessile leaf or two near the middle and a large 

 terminal solitary flower. Calyx rotate, deeply 5-cleft, the base 

 free from or adnate to the base of the ovary, the lobes herba 

 ceous, somewhat imbricate in the bud. Petals 5, imbricate in 

 the bud, with a cluster of more or less united gland-tipped fila- 

 ments at the base of each. Stamens 5, alternate with the petals : 

 anthers 2-celled. Ovary entire. 1-celled with 3-4 parietal pla- 

 centae: stigmas as many, closely sessile, very obtuse. Capsule 

 3-4-valved from the apex, the valves bearing the many-seeded 

 placentae on their middle. Seeds with a loose thickish some- 

 what winged testa. 



P. Californica Greene Pitt, ii, 102. Leaves ovate to broadly oval, 

 6-18 lines long, narrowed below to a slender petiole : stems slender, flex- 

 uous, 1-2 feet high, with a small sessile bract borne above the middle; 

 calyx-lobes lanceolate, obtuse, 4 lines long; petals white, broadly ovate to 

 elliptical, 3-10 lines long by 6 lines broad, bristles of the appendages 20- 

 24. almost capillary, united" below into a broad cuneiform base; filaments 

 subulate, about half as long as the petals. In marshes at the eastern base 

 of the Coast Mountains southern Oregon and adjacent California. 



P. fimbriata Banks Sims 7 Keen. Ann. Bot. i, b91. Leaves cordate to 

 reniform, 6-12 lines long, on long slender petioles : stems slender, 6-18 

 inches high, with a comparatively large leaf-like bract above the middle: 

 sepals oblong, acutish ; petals spatulate, 4-6 lines long, conspicuously fim- 

 briolate ciliate at base; bristles of the appendages 5-9, often short or re- 

 duced to mere teeth on the cuneiform base; filaments filiform, about half as 

 long as the petals. In high mountain marshes, Alaska to California and 

 the Rocky Mountains. 



Order XXXI. HYDRANGEAS Dumort Anal. Fam. 36, 38. 



Shrubs with opposite leaves without stipules, the flowers in 

 terminal or axillary panicles or cymes. Calyx 4 5-cleft, valvate 

 in the bud. Petals as many as the sepals and alternate with 

 them , convolute in the bud. Stamens few or numerous in- 

 serted with the petals into the throat of the c^lyx: anthers in- 

 trorse. Ovary either free from or coherent with the tube of 

 the calyx, of 3-5 or more carpels with as many cells as carpels 

 and the placenta? in the axis. Fruit capsular, with septicidal 

 or loculicidal dehiscence. Seeds anatropous, small and nu- 

 merous or solitary. Embryo straight, in the axis of fleshy 

 albumen. 



1. Philadelphus. Calyx-tube coherent with the 4-5-celled ovary: 

 stamens 20 or more : seeds numerous. 



2. "Whipplea. Calyx nearly free from the 3-5-celled ovary: stamens 

 3-12; ovules and seeds solitary in the ceils. 



1 PHILADELPHUS L. Gen. n. 614. 



Rather large shrubs with opposite simple leaves without sti- 

 pules, and large showy flowers in paniculate c vines or sometimes 

 solitary in the axils. Calvx with turbinate tube coherent with 



