PARNASSIA. HYDRANGEAS. 205 



PHILADELPHUS 



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. Heeds with a loose thickish some- 

 w.hat 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, 8-10 lines long by 6 lines broad, bristles of the appendages 20- 

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

 subulate, about ha'lf as long as the petals. In marshes at the eastern base 

 of the Coast Mountains southern Oregon and adjacent California. 



P. ilmbriata Banks Sims 7 Keen. Ann. Bot. i, o91. 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. HYDRANGEAC^ 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 clyx: 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 placentse in the axis. Fruit capsular, with septicidal 

 or loculicidal dehisceuce. Seeds anatropous, small and nu- 

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

 albumen. 



1. Philadelphia. 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 

 8-12; ovules and seeds solitary in the cells. 



1 PHILADELPHUS L. Gen. n. 614. 



Rather large shrubs with opposite simple leaves without sti- 

 pules, and large showy flowers in paniculate cvmes or sometimes 

 solitary in the axils. Calyx with turbinate tube coherent with 



